SECTION 417-01: Exterior Lighting
2014 Flex Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 05/02/2013

Exterior Lighting

 

DTC Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

 


  BCM DTC Chart

DTC Description Action
B1115:11 High Mounted Stop Lamp Control: Circuit Short To Ground GO to Pinpoint Test J .
B123A:11 Left Front Turn Indicator: Circuit Short To Ground GO to Pinpoint Test M .
B123A:15 Left Front Turn Indicator: Circuit Short To Battery or Open GO to Pinpoint Test M .
B123B:11 Right Front Turn Indicator: Circuit Short To Ground GO to Pinpoint Test M .
B123B:15 Right Front Turn Indicator: Circuit Short To Battery or Open GO to Pinpoint Test M .
B1277:11 Reverse Lamp: Circuit Short To Ground GO to Pinpoint Test U .
B1277:15 Reverse Lamp: Circuit Short To Battery or Open If the reversing lamps are inoperative, GO to Pinpoint Test U .

If the reversing lamps are always on, GO to Pinpoint Test W .
B132B:11 Left Stop/Turn Lamp: Circuit Short To Ground GO to Pinpoint Test J .
B132B:15 Left Stop/Turn Lamp: Circuit Short To Battery or Open If the stop/turn lamp is inoperative, GO to Pinpoint Test J .

If the stop/turn lamp is always on, GO to Pinpoint Test K .
B132C:11 Right Stop/Turn Lamp: Circuit Short To Ground GO to Pinpoint Test J .
B132C:15 Right Stop/Turn Lamp: Circuit Short To Battery or Open If the stop/turn lamp is inoperative, GO to Pinpoint Test J .

If the stop/turn lamp is always on, GO to Pinpoint Test K .
B1C98:11 Left Corner Lamp Circuit: Circuit Short To Ground GO to Pinpoint Test M .
B1C98:15 Left Corner Lamp Circuit: Circuit Short To Battery or Open GO to Pinpoint Test M .
B1C99:11 Right Corner Lamp Circuit: Circuit Short To Ground GO to Pinpoint Test M .
B1C99:15 Right Corner Lamp Circuit: Circuit Short To Battery or Open GO to Pinpoint Test M .
B1A85:11 Ambient Light Sensor: Circuit Short To Ground GO to Pinpoint Test H .
B1A85:13 Ambient Light Sensor: Circuit Open GO to Pinpoint Test H .
B1D00:11 Left Low Beam: Circuit Short To Ground GO to Pinpoint Test A .
B1D00:15 Left Low Beam: Circuit Short To Battery or Open GO to Pinpoint Test A .
B1D01:11 Right Low Beam: Circuit Short To Ground GO to Pinpoint Test A .
B1D01:15 Right Low Beam: Circuit Short To Battery or Open GO to Pinpoint Test A .
B1D02:11 Left High Beam Circuit: Circuit Short To Ground GO to Pinpoint Test B .
B1D02:15 Left High Beam Circuit: Circuit Short To Battery or Open If the high beams are inoperative, GO to Pinpoint Test B .

If the high beams are always on, GO to Pinpoint Test D .
B1D03:11 Right High Beam Circuit: Circuit Short To Ground GO to Pinpoint Test B .
B1D03:15 Right High Beam Circuit: Circuit Short To Battery or Open If the high beams are inoperative, GO to Pinpoint Test B .

If the high beams are always on, GO to Pinpoint Test D .
B1D35:11 Hazard Switch: Circuit Short to Ground GO to Pinpoint Test N .
C0040:12 Brake Pedal Switch "A": Circuit Short To Battery GO to Pinpoint Test K .

 


  SCCM DTC Chart

DTC Description Action
B1007:09 High-Beam Headlamp Switch: Component Failure GO to Pinpoint Test D .
B1D36:09 Turn Indicator Switch: Component Failure GO to Pinpoint Test L .

 


  RFA Module DTC Chart

DTC Description Action
P1571:12 Brake Switch: Circuit Short To Battery GO to Pinpoint Test K .

 

Symptom Charts

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

 
Symptom Chart: Headlamps
Condition Possible Sources Action
  • One or both low beams are inoperative
  • Refer to the Diagnostic Routine
  • One or both high beams are inoperative
  • Refer to the Diagnostic Routine
  • The low beams are on continuously
  • Refer to the Diagnostic Routine
  • The high beams are on continuously
  • Refer to the Diagnostic Routine
  • The flash-to-pass feature is inoperative
  • Refer to the Diagnostic Routine
 
Symptom Chart: Daytime Running Lamps (DRL)
Condition Possible Sources Action
  • The Daytime Running Lamps (DRL) are inoperative
  • Refer to the Diagnostic Routine
 
Symptom Chart: Autolamps
Condition Possible Sources Action
  • The autolamps are inoperative
  • Refer to the Diagnostic Routine
  • The autolamps are on continuously
  • Refer to the Diagnostic Routine
 
Symptom Chart: Stoplamps
Condition Possible Sources Action
  • All the stoplamps are inoperative
  • Refer to the Diagnostic Routine
  • One or more stoplamps are inoperative
  • Refer to the Diagnostic Routine
  • The stoplamps are on continuously
  • Refer to the Diagnostic Routine
 
Symptom Chart: Turn Signal And Hazard Lamps
Condition Possible Sources Action
  • The turn signal lamps flash fast and no bulbs are inoperative
  • NOTE: LED lamps draw low current compared to an incandescent bulb. The Body Control Module (BCM) can interpret this as a bulb out and fast flashes (bulb outage mode).

    • Bulb

  • INSTALL correct turn lamp bulbs as necessary.
  • The turn signal function is inoperative
  • Refer to the Diagnostic Routine
  • The turn signal function is always on
  • Refer to the Diagnostic Routine
  • INSTALL a new multifunction switch. REFER to Section 211-05 . TEST the system for normal operation. If the concern still exists, INSTALL a new SCCM . REFER to Section 211-05 .
  • One turn signal lamp is inoperative/always on
  • Refer to the Diagnostic Routine
  • The hazard lamp function is inoperative/always on
  • Refer to the Diagnostic Routine
 
Symptom Chart: Parking, Rear And License Plate Lamps
Condition Possible Sources Action
  • One or more parking, rear or license plate lamps is inoperative
  • Refer to the Diagnostic Routine
  • The parking, rear or license plate lamps are on continuously
  • Refer to the Diagnostic Routine
 
Symptom Chart: Fog Lamps
Condition Possible Sources Action
  • Both fog lamps are inoperative
  • Refer to the Diagnostic Routine
  • An individual fog lamp is inoperative
  • Refer to the Diagnostic Routine
  • The fog lamps are on continuously
  • Refer to the Diagnostic Routine
  • The fog lamps on indicator is inoperative
  • Refer to the Diagnostic Routine
 
Symptom Chart: Reversing Lamps
Condition Possible Sources Action
  • All the reversing lamps are inoperative
  • Refer to the Diagnostic Routine
  • An individual reversing lamp is inoperative
  • Refer to the Diagnostic Routine
  • The reversing lamps are on continuously
  • Refer to the Diagnostic Routine
 
Symptom Chart: Trailer Lamps
Condition Possible Sources Action
  • All the trailer lamps are inoperative
  • Refer to the Diagnostic Routine
  • The trailer stop/turn lamp is inoperative
  • Refer to the Diagnostic Routine
  • The trailer parking lamps are inoperative
  • Refer to the Diagnostic Routine
  • The trailer reversing lamps are inoperative
  • Refer to the Diagnostic Routine
  • The trailer lamps are on continuously
  • Refer to the Diagnostic Routine
  • The trailer battery charging is inoperative/does not operate correctly
  • Refer to the Diagnostic Routine
  • The trailer electric brakes are inoperative/always applied
  • Refer to the Diagnostic Routine
 

Pinpoint Tests

 

Pinpoint Test A: One Or Both Low Beams Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Low Beams in Headlamps .

Refer to Component Description - Headlamp Assembly in Headlamps .

Refer to Component Description - Ballast in Headlamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1D00:11 Left Low Beam: Circuit Short To Ground Sets when the BCM detects a short to ground from the LH low beam output circuit.
B1D00:15 Left Low Beam: Circuit Short To Battery or Open Sets when the BCM detects an open from the LH low beam output circuit.
B1D01:11 Right Low Beam: Circuit Short To Ground Sets when the BCM detects a short to ground from the RH low beam output circuit.
B1D01:15 Right Low Beam: Circuit Short To Battery or Open Sets when the BCM detects an open from the RH low beam output circuit.

 
PINPOINT TEST A: ONE OR BOTH LOW BEAMS ARE INOPERATIVE

NOTE: Due to varying wattage ratings and the resulting current draw differences of certain aftermarket halogen headlamp bulbs, the BCM may activate its short circuit protection strategy, resulting in the low beam output circuit becoming inoperative. Verify the bulbs meet Ford specifications. If the bulbs do not meet Ford specifications, install the correct bulbs. Run the self-test (required to clear certain DTCs and reset the BCM ). Correct any unresolved DTCs. Clear all DTCs. Test the system for normal operation.

Test Step Result / Action to Take
  A1 CHECK FOR VOLTAGE TO THE HEADLAMP ASSEMBLY  
  • Ignition OFF.
  • Disconnect: Inoperative LH Headlamp C1021 or RH Headlamp C1041 (Halogen headlamps).
  • Disconnect: Inoperative LH Headlamp C1284 or RH Headlamp C1285 ( HID Headlamps).
  • Place the headlamp switch in the headlamps on position.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-1 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1041-1 CLF05 (BU/GN) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-2 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1285-2 CLF05 (BU/GN) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to A2 .

No
VERIFY the BCM fuse 17 (10A) (LH low beam) or fuse 16 (10A) (RH low beam) is OK. If OK, GO to A6 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  A2 CHECK THE HEADLAMP ASSEMBLY GROUND CIRCUIT FOR AN OPEN  
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-1 CLF04 (BN/BU) C1021-2 GD123 (BK/GY)
    RH Headlamp
    C1041-1 CLF05 (BU/GN) C1041-2 GD120 (BK/GN)



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-2 CLF04 (BN/BU) C1284-6 GD123 (BK/GY)
    RH Headlamp
    C1285-2 CLF05 (BU/GN) C1285-6 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
For halogen headlamps, INSTALL a new headlamp bulb. REFER to Headlamp Bulb .

For HID headlamps, GO to A3 .

No
REPAIR the circuit.
  A3 CHECK FOR BALLAST SUPPLY VOLTAGE TO THE HEADLAMP ASSEMBLY  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-3 SBB57 (RD) — Ground
    RH Headlamp
    C1285-3 SBB78 (BN/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to A4 .

No
VERIFY the BJB fuse 57 (20A) (LH headlamp) or fuse 78 (20A) (RH headlamp) is OK. If OK, REPAIR the affected circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  A4 CHECK THE BALLAST  
  • Place the headlamp switch in the off position.
  • Substitute a known good ballast.
  • Place the headlamp switch in the headlamps on position.
  • Does the inoperative headlamp illuminate?
Yes
REMOVE the known good ballast. INSTALL a new ballast. REFER to Ballast .

No
REMOVE the known good ballast. GO to A5 .
  A5 CHECK THE HID BULB  
  • Place the headlamp switch in the off position.
  • Substitute a known good HID bulb.
  • Place the headlamp switch in the headlamps on position.
  • Does the inoperative headlamp illuminate?
Yes
REMOVE the known good HID bulb. INSTALL a new HID bulb. REFER to Headlamp Bulb .

No
REMOVE the known good HID bulb. REPAIR or INSTALL a new headlamp assembly. REFER to Headlamp Assembly .
  A6 REPEAT THE BCM SELF-TEST AND CHECK FOR VOLTAGE TO THE HEADLAMP  
  • Place the headlamp switch in the off position.
  • Ignition ON.
  • Using a scan tool, clear the DTCs and perform the BCM self-test.
  • Place the headlamp switch in the headlamps on position.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-1 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1041-1 CLF05 (BU/GN) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-2 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1285-2 CLF05 (BU/GN) — Ground



  • Is the voltage greater than 11 volts?
Yes
For halogen headlamps, INSTALL a new headlamp bulb. REFER to Headlamp Bulb .

For HID headlamps, GO to A7 .

No
GO to A8 .
  A7 CHECK THE HEADLAMP HARNESS  
  • Ignition OFF.
  • Place the headlamp switch in the off position.
  • Check the headlamp harness for an internal short to the ground circuit.
  • Is the headlamp harness OK?
Yes
INSTALL a new ballast. REFER to Ballast .

No
REPAIR or INSTALL a new headlamp assembly. REFER to Headlamp Assembly .
  A8 CHECK THE BCM LOW BEAM VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Place the headlamp switch in the off position.
  • Disconnect: BCM C2280E.
  • For halogen headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-1 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1041-1 CLF05 (BU/GN) — Ground



  • For HID headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-2 CLF04 (BN/BU) — Ground
    RH Headlamp
    C1285-2 CLF05 (BU/GN) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to A9 .

No
REPAIR the circuit.
  A9 CHECK THE BCM LOW BEAM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • For halogen headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-1 CLF04 (BN/BU) C2280E-2 CLF04 (BN/BU)
    RH Headlamp
    C1041-1 CLF05 (BU/GN) C2280E-1 CLF05 (BU/GN)



  • For HID headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-2 CLF04 (BN/BU) C2280E-2 CLF04 (BN/BU)
    RH Headlamp
    C1285-2 CLF05 (BU/GN) C2280E-1 CLF05 (BU/GN)



  • Is the resistance less than 3 ohms?
Yes
GO to A10 .

No
REPAIR the circuit.
  A10 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test B: One or Both High Beams are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - High Beams in Headlamps .

Refer to Component Description - Headlamp Assembly in Headlamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1D02:11 Left High Beam Circuit: Circuit Short To Ground Sets when the BCM detects a short to ground from the LH high beam output circuit.
B1D02:15 Left High Beam Circuit: Circuit Short To Battery or Open Sets when the BCM detects an open from the LH high beam output circuit.
B1D03:11 Right High Beam Circuit: Circuit Short To Ground Sets when the BCM detects a short to ground from the RH high beam output circuit.
B1D03:15 Right High Beam Circuit: Circuit Short To Battery or Open Sets when the BCM detects an open from the RH high beam output circuit.

 
PINPOINT TEST B: ONE OR BOTH HIGH BEAMS ARE INOPERATIVE
Test Step Result / Action to Take
  B1 CHECK THE LOW BEAM OPERATION  
  • Ignition OFF.
  • Place the headlamp switch in the headlamps on position and observe the headlamps.
  • Place the multifunction switch in the HIGH BEAM position and observe the headlamps.
  • Place the multifunction switch in the LOW BEAM position and observe the headlamps.
  • Do the low beams illuminate?
Yes
If an individual high beam is inoperative, GO to B3 .

If both high beams are inoperative, VERIFY the BCM fuse 39 (15A) is OK. If OK, GO to B2 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

No
GO to Pinpoint Test A .
  B2 CHECK THE MULTIFUNCTION SWITCH INPUT  
  • Ignition ON.
  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM HEADLAMP_SW PID while placing the multifunction switch in the flash-to-pass and high beam positions.
  • Do the PID states agree with the multifunction switch positions?
Yes
GO to B8 .

No
INSTALL a new multifunction switch. REFER to Section 211-05 .

If the concern still exists, INSTALL an new SCCM . REFER to Section 211-05 .
  B3 CHECK FOR VOLTAGE TO THE HEADLAMP  
  • Place the headlamp switch in the off position.
  • Disconnect: Inoperative LH Headlamp C1021 or RH Headlamp C1041 (Halogen headlamps).
  • Disconnect: Inoperative LH Headlamp C1284 or RH Headlamp C1285 ( HID Headlamps).
  • Place the headlamp switch in the headlamps on position and the multifunction switch in the HIGH BEAM position.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1041-3 CLF03 (VT/OG) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1285-1 CLF03 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to B4 .

No
GO to B5 .
  B4 CHECK THE HEADLAMP GROUND CIRCUIT FOR AN OPEN  
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) C1021-2 GD123 (BK/GY)
    RH Headlamp
    C1041-3 CLF03 (VT/OG) C1041-2 GD120 (BK/GN)



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) C1284-6 GD123 (BK/GY)
    RH Headlamp
    C1285-1 CLF03 (VT/OG) C1285-6 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
REPAIR or INSTALL a new headlamp assembly. REFER to Headlamp Assembly .

No
REPAIR the circuit.
  B5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE HEADLAMP  
  • Place the headlamp switch in the off position.
  • Ignition ON.
  • Using a scan tool, clear the DTCs and perform the BCM self-test.
  • Place the headlamp switch in the headlamps on position and the multifunction switch in the HIGH BEAM position.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1041-3 CLF03 (VT/OG) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1285-1 CLF03 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
For halogen headlamps, INSTALL a new headlamp bulb. REFER to Headlamp Bulb .

For HID headlamps, INSTALL a new headlamp assembly. REFER to Headlamp Assembly .

No
GO to B6 .
  B6 CHECK THE BCM HIGH BEAM VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • For halogen headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1041-3 CLF03 (VT/OG) — Ground



  • For HID headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1285-1 CLF03 (VT/OG) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to B7 .

No
REPAIR the circuit.
  B7 CHECK THE BCM HIGH BEAM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • For halogen headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) C2280E-8 CLF02 (GY/BN)
    RH Headlamp
    C1041-3 CLF03 (VT/OG) C2280E-7 CLF03 (VT/OG)



  • For HID headlamps, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) C2280E-8 CLF02 (GY/BN)
    RH Headlamp
    C1285-1 CLF03 (VT/OG) C2280E-7 CLF03 (VT/OG)



  • Is the resistance less than 3 ohms?
Yes
GO to B8 .

No
REPAIR the circuit.
  B8 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test C: The Low Beams Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Low Beams in Headlamps .

Refer to Component Description - Ballast in Headlamps .

 
PINPOINT TEST C: THE LOW BEAMS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  C1 CHECK THE COMMUNICATION NETWORK  
  • Ignition ON.
  • Using a scan tool, perform the network test.
  • Does the SCCM pass the network test?
Yes
GO to C2 .

No
REFER to Section 418-00 . The SCCM Does Not Respond To The Scan Tool.
  C2 CHECK FOR LIGHT SENSOR DTCs  
  • Review the DTCs recorded from the BCM self-test.
  • Is DTC B1A85:11 or DTC B1A85:13 present?
Yes
GO to Pinpoint Test H .

No
GO to C3 .
  C3 CHECK THE SCCM AUTOLAMP ON REQUEST PID  
  • Ignition ON.
  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM headlamp switch PID (EXT_LMP_SW) while placing the headlamp switch in the AUTOLAMPS ON and then OFF position.
  • Does the PID agree with the headlamp switch when it is in the AUTOLAMPS ON position and indicate it is not in the AUTOLAMPS ON position when the headlamp switch is in the OFF position?
Yes
GO to C4 .

No
GO to Pinpoint Test H .
  C4 CHECK THE SCCM HEADLAMP SWITCH PIDs  

    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PID.

  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM headlamp switch input PID (EXT_LMP_SW) while moving the headlamp switch through all positions (OFF, PARKING LAMPS and HEADLAMPS).
  • Do the headlamp switch positions agree with the PID?
Yes
GO to C9 .

No
GO to C5 .
  C5 CHECK FOR VOLTAGE TO THE HEADLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-2 CLS34 (GY) — Ground
    C205-4 CLF19 (VT/GN) — Ground
    C205-6 CLF23 (WH/VT) — Ground
    C205-7 CLF24 (YE/BU) — Ground



  • Are the voltages greater than 5 volts?
Yes
GO to C6 .

No
GO to C7 .
  C6 CHECK THE HEADLAMP SWITCH GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-6 CLF23 (WH/VT) C205-3 GD375 (BK/BU)



  • Is the voltage greater than 5 volts?
Yes
INSTALL a new headlamp switch. REFER to Headlamp Switch .

No
REPAIR the circuit.
  C7 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND  
  • Disconnect: SCCM C2414A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-2 CLS34 (GY) — Ground
    C205-4 CLF19 (VT/GN) — Ground
    C205-6 CLF23 (WH/VT) — Ground
    C205-7 CLF24 (YE/BU) — Ground



  • Are the resistances greater than 10,000 ohms?
Yes
GO to C8 .

No
REPAIR the circuit.
  C8 CHECK THE HEADLAMP SWITCH INPUT CIRCUITS FOR AN OPEN  
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-2 CLS34 (GY) C2414A-6 CLS34 (GY)
    C205-4 CLF19 (VT/GN) C2414A-3 CLF19 (VT/GN)
    C205-6 CLF23 (WH/VT) C2414A-7 CLF23 (WH/VT)
    C205-7 CLF24 (YE/BU) C2414A-4 CLF24 (YE/BU)



  • Are the resistances less than 3 ohms?
Yes
GO to C10 .

No
REPAIR the affected circuit.
  C9 CHECK THE BCM OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Ignition ON.
  • Does the LH or RH headlamp continue to illuminate?
Yes
REPAIR the affected circuit.

No
GO to C11 .
  C10 CHECK FOR CORRECT SCCM OPERATION  
  • Disconnect and inspect all the SCCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM . REFER to Section 211-05 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  C11 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test D: The High Beams Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - High Beams in Headlamps .

Refer to Component Description - Headlamp Assembly in Headlamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1007:09 High-Beam Headlamp Switch: Component Failure Sets when the SCCM detects a fault from the multifunction switch input.
B1D02:15 Left High Beam Circuit: Circuit Short To Battery or Open Sets the BCM detects a short to voltage from the LH high beam output circuit.
B1D03:15 Right High Beam Circuit: Circuit Short To Battery or Open Sets when the BCM detects a short to voltage from the RH high beam output circuit.

 
PINPOINT TEST D: THE HIGH BEAMS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  D1 CHECK THE MULTIFUNCTION SWITCH INPUT  
  • Ignition ON.
  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM FLASH-to-PASS and HIGH_BEAM_SW PIDs while placing the multifunction switch in the flash-to-pass, high beam and rest positions.
  • Do the PID values agree with the multifunction switch position?
Yes
GO to D2 .

No
INSTALL a new multifunction switch. REFER to Section 211-05 .

If the concern still exists, INSTALL a new SCCM . REFER to Section 211-05 .
  D2 CHECK THE HIGH BEAM VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE  
  • Ignition OFF.
  • Disconnect: Incorrectly Operating LH Headlamp C1021 or RH Headlamp C1041 (Halogen headlamps).
  • Disconnect: Incorrectly Operating LH Headlamp C1284 or RH Headlamp C1285 ( HID Headlamps).
  • Ignition ON.
  • Make sure the multifunction switch in the rest position.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1041-3 CLF03 (VT/OG) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1285-1 CLF03 (VT/OG) — Ground



  • Is any voltage present?
Yes
GO to D3 .

No
INSTALL a new headlamp assembly. REFER to Headlamp Assembly .
  D3 CHECK THE BCM HIGH BEAM OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Ignition ON.
  • For halogen headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1021-3 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1041-3 CLF03 (VT/OG) — Ground



  • For HID headlamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-1 CLF02 (GY/BN) — Ground
    RH Headlamp
    C1285-1 CLF03 (VT/OG) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit.

No
GO to D4 .
  D4 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test E: The Flash-To-Pass Feature Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

Refer to System Operation - Flash-To-Pass in Headlamps .

 
PINPOINT TEST E: THE FLASH-TO-PASS FEATURE IS INOPERATIVE
Test Step Result / Action to Take
  E1 VERIFY THE HIGH BEAM HEADLAMP OPERATION  
  • Ignition ON.
  • Place the headlamp switch in the headlamps on position.
  • Place the multifunction switch in the HIGH BEAM position while observing the headlamps.
  • Do the high beam headlamps illuminate?
Yes
INSTALL a new multifunction switch. REFER to Section 211-05 .

If the concern still exists, INSTALL a new SCCM . REFER to Section 211-05 .

No
GO to Pinpoint Test B .
 

Pinpoint Test F: The Daytime Running Lamps (DRL) Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Normal Operation and Fault Conditions

Refer to System Operation - DRL in Daytime Running Lamps (DRL) .

 
PINPOINT TEST F: THE DRL ARE INOPERATIVE
Test Step Result / Action to Take
  F1 CHECK THE OPERATION OF THE HEADLAMPS AND FOG LAMPS  
  • Ignition OFF.
  • Place the headlamp switch in the ON position and activate the fog lamps.
  • Do the headlamps and fog lamps operate correctly?
Yes
GO to F2 .

No
GO to Symptom Chart - : Headlamps or GO to Symptom Chart - : Fog Lamps .
  F2 VERIFY THE DRL OPERATION  
  • Place the headlamp switch in the off position and deactivate the hazard lamp function.
  • Ignition ON.
  • Place the gear selector lever in any gear other than PARK (P).
  • Are the DRL illuminated?
Yes
The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.

No
GO to F3 .
  F3 CHECK THE TRANSMISSION GEAR INPUT  
  • Using a scan tool, view PCM PIDs.
  • Monitor the PCM Transmission Range (TR) PID while placing the gear selector lever through all its positions.
  • Does the PID agree with the gear selection?
Yes
INSTALL a new BCM . REFER to Section 419-10 .

No
REFER to Section 307-01 to diagnose the transmission range input.
 

Pinpoint Test G: The Autolamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Autolamps in Autolamps .

Refer to Component Description - Light Sensor in Autolamps .

 
PINPOINT TEST G: THE AUTOLAMPS ARE INOPERATIVE
Test Step Result / Action to Take
  G1 CHECK THE MANUAL HEADLAMP OPERATION  
  • Place the headlamp switch in the headlamps ON and OFF positions.
  • Do the headlamps operate correctly?
Yes
GO to G2 .

No
REFER to Symptom Chart: Headlamps in this section.
  G2 CHECK FOR VOLTAGE TO THE LIGHT SENSOR  
  • Ignition OFF.
  • Disconnect: Light Sensor C286 ( DATC ).
  • Disconnect: Light Sensor C287 ( EMTC ).
  • Ignition ON.
  • Place the headlamp switch in the autolamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is the voltage approximately 5 volts?
Yes
INSTALL a new light sensor. REFER to Light Sensor .

No
GO to G3 .
  G3 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test H: The Autolamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 85 , Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Autolamps in Autolamps .

Refer to Component Description - Light Sensor in Autolamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1A85:11 Ambient Light Sensor: Circuit Short To Ground Sets when the BCM detects a short to ground from the light sensor input circuit.
B1A85:13 Ambient Light Sensor: Circuit Open Sets when the BCM detects an open or short to voltage from the light sensor input circuit.

 
PINPOINT TEST H: THE AUTOLAMPS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  H1 CHECK THE SCCM HEADLAMP SWITCH PIDs  

    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PIDs.

  • Ignition ON.
  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM EXT_LMP_SW while placing the headlamp switch in the AUTOLAMPS ON and then OFF position.
  • Does the PID agree with the headlamp switch when it is in the AUTOLAMPS ON position and indicate it is not in the AUTOLAMPS ON position when the headlamp switch is in the OFF position?
Yes
GO to H5 .

No
GO to H2 .
  H2 CHECK FOR VOLTAGE TO THE HEADLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-4 CLF19 (VT/GN) — Ground



  • Is the voltage greater than 5 volts?
Yes
INSTALL a new headlamp switch. REFER to Headlamp Switch .

No
GO to H3 .
  H3 CHECK AUTOLAMPS REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND  
  • Disconnect: SCCM C2414A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-4 CLF19 (VT/GN) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to H4 .

No
REPAIR the circuit.
  H4 CHECK THE AUTOLAMPS REQUEST INPUT CIRCUIT FOR AN OPEN  
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-4 CLF19 (VT/GN) C2414A-3 CLF19 (VT/GN)



  • Is the resistance less than 3 ohms?
Yes
GO to H14 .

No
REPAIR the circuit.
  H5 CHECK THE SCCM HEADLAMP SWITCH PIDs  

    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PID.

  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM headlamp switch input PID (EXT_LMP_SW) while moving the headlamp switch through all positions (OFF, PARKING LAMPS and HEADLAMPS).
  • Do the headlamp switch positions agree with the PID?
Yes
GO to H6 .

No
GO to Pinpoint Test C .
  H6 USE THE RECORDED DTCs FROM THE BCM SELF-TEST  
  • Check the recorded results from the BCM self-test.
  • Is DTC B1A85:13 or DTC B1A85:11 present?
Yes
For DTC B1A85:13, GO to H8 . For DTC B1A85:11, GO to H12 .

No
GO to H7 .
  H7 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (NO DTC)  
  • Ignition OFF.
  • Disconnect: Light Sensor C286 ( DATC ).
  • Disconnect: Light Sensor C287 ( EMTC ).
  • Ignition ON.
  • Place the headlamp switch in the autolamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is the voltage approximately 5 volts?
Yes
INSTALL a new light sensor. REFER to Light Sensor .

No
GO to H15 .
  H8 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:13)  
  • Ignition OFF.
  • Disconnect: Light Sensor C286 ( DATC ).
  • Disconnect: Light Sensor C287 ( EMTC ).
  • Ignition ON.
  • Place the headlamp switch in the autolamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is the voltage approximately 5 volts?
Yes
GO to H11 .

No
GO to H9 .
  H9 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280B.
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit.

No
GO to H10 .
  H10 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR AN OPEN  
  • Ignition OFF.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) C2280B-30 VLF14 (BU)
    EMTC
    C287-2 VLF14 (BU/BN) C2280B-30 VLF14 (BU/BN)



  • Is the resistance less than 3 ohms?
Yes
GO to H15 .

No
REPAIR the circuit.
  H11 CHECK THE LIGHT SENSOR GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) C286-4 GD374 (BK/WH)
    EMTC
    C287-2 VLF14 (BU/BN) C287-4 GD374 (BK/WH)



  • Is the voltage approximately 5 volts?
Yes
INSTALL a new light sensor. REFER to Light Sensor .

No
REPAIR the circuit.
  H12 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:11)  
  • Ignition OFF.
  • Disconnect: Light Sensor C286 ( DATC ).
  • Disconnect: Light Sensor C287 ( EMTC ).
  • Ignition ON.
  • Place the headlamp switch in the autolamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is the voltage approximately 5 volts?
Yes
INSTALL a new light sensor. REFER to Light Sensor .

No
GO to H13 .
  H13 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Disconnect: BCM C2280B.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    DATC
    C286-2 VLF14 (BU) — Ground
    EMTC
    C287-2 VLF14 (BU/BN) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to H15 .

No
REPAIR the circuit.
  H14 CHECK FOR CORRECT SCCM OPERATION  
  • Disconnect and inspect all the SCCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM . REFER to Section 211-05 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  H15 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test I: All The Stoplamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps .

Refer to Component Description - Stoplamp Switch in Stoplamps .

 
PINPOINT TEST I: ALL THE STOPLAMPS ARE INOPERATIVE
Test Step Result / Action to Take
  I1 CHECK THE BRAKE SWITCH 2 BCM PID  
  • Ignition ON.
  • Using a scan tool, view BCM PIDs.
  • Monitor the BCM BOO_2 PID while pressing the brake pedal.
  • Does the PID read On while the brake pedal pressed?
Yes
GO to I2 .

No
GO to I5 .
  I2 CHECK THE STOPLAMP SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Ignition OFF.
  • Disconnect: Stoplamp Switch C278.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C278-1 SBB59 (BU/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to I3 .

No
VERIFY the BJB fuse 59 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  I3 BYPASS THE STOPLAMP SWITCH  
  • Connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C278-1 SBB59 (BU/RD) C278-4 CCB08 (VT/WH)



  • Do the stoplamps illuminate?
Yes
REMOVE the jumper wire. INSTALL a new stoplamp switch. REFER to Stoplamp Switch .

No
LEAVE the jumper wire connected. GO to I4 .
  I4 CHECK THE STOPLAMP SWITCH SIGNAL TO THE BCM  
  • Disconnect: BCM C2280B.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2280B-28 CCB08 (VT/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the jumper wire. GO to I5 .

No
REMOVE the jumper wire. REPAIR the stoplamp switch output circuit for an open.
  I5 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test J: One Or More Stoplamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1115:11 High Mounted Stop Lamp Control: Circuit Short To Ground Sets when the BCM detects a short to ground from the high mounted stoplamp voltage supply circuit.
B132B:11 Left Stop/Turn Lamp: Circuit Short To Ground Sets when the BCM detects a short to ground from the left rear stop/turn lamp voltage supply circuit.
B132B:15 Left Stop/Turn Lamp: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the left rear stop/turn lamp voltage supply circuit.
B132C:11 Right Stop/Turn Lamp: Circuit Short To Ground Sets when the BCM detects a short to ground from the right rear stop/turn lamp voltage supply circuit.
B132C:15 Right Stop/Turn Lamp: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the right rear stop/turn lamp voltage supply circuit.

 
PINPOINT TEST J: ONE OR MORE STOPLAMPS ARE INOPERATIVE
Test Step Result / Action to Take
  J1 DETERMINE THE INOPERATIVE STOPLAMP  
  • Ignition OFF.
  • Apply the brake pedal and observe the stoplamps.
  • Are all the stoplamps inoperative?
Yes
GO to Pinpoint Test I .

No
For the high mounted stoplamp, GO to J2 .

If an individual rear stoplamp is inoperative, GO to J4 .
  J2 CHECK THE HIGH MOUNTED STOPLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Disconnect: High Mounted Stoplamp C904.
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C904-1 CLS17 (YE/GY) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to J3 .

No
REPAIR the circuit.
  J3 CHECK THE HIGH MOUNTED STOPLAMP GROUND CIRCUIT FOR AN OPEN  
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C904-1 CLS17 (YE/GY) C904-2 GD349 (BK/GY)



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new high mounted stoplamp. REFER to High Mounted Stoplamp .

No
REPAIR the circuit.
  J4 CHECK FOR VOLTAGE TO THE REAR LAMP ASSEMBLY  
  • Disconnect: Inoperative LH Rear Lamp C498 or RH Rear Lamp C499.
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Lamp
    C498-3 CLS18 (GY/BN) — Ground
    RH Rear Lamp
    C499-3 CLS19 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to J5 .

No
VERIFY the BCM fuse 14 (15A) (LH stoplamp) or fuse 13 (15A) (RH stoplamp) is OK. If OK, GO to J7 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  J5 CHECK THE BULB REAR LAMP ASSEMBLY GROUND CIRCUIT FOR AN OPEN  
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Lamp
    C498-3 CLS18 (GY/BN) C498-1 GD351 (BK/GN)
    RH Rear Lamp
    C499-3 CLS19 (VT/OG) C499-1 GD349 (BK/GY)



  • Is the voltage greater than 11 volts?
Yes
GO to J6 .

No
REPAIR the circuit
  J6 CHECK THE REAR LAMP JUMPER HARNESS FOR AN OPEN CIRCUIT  
  • Inspect the rear lamp jumper harness for an open circuit and shorts.
  • Is the rear lamp jumper harness OK?
Yes
INSTALL a new rear stoplamp bulb socket.

No
REPAIR or INSTALL a new rear lamp jumper harness.
  J7 CARRY OUT THE BCM ON-DEMAND SELF-TEST AND RECHECK FOR VOLTAGE TO THE REAR STOPLAMP  
  • Ignition ON.
  • Using a scan tool, clear the DTCs and repeat the BCM self-test.
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Lamp
    C498-3 CLS18 (GY/BN) — Ground
    RH Rear Lamp
    C499-3 CLS19 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to J8 .

No
GO to J9 .
  J8 CHECK THE REAR LAMP JUMPER HARNESS FOR A SHORTED CIRCUIT  
  • Inspect the rear lamp jumper harness for a shorted circuit.
  • Is the rear lamp jumper harness OK?
Yes
INSTALL a new rear stoplamp bulb socket.

No
REPAIR or INSTALL a new rear lamp jumper harness.
  J9 CHECK THE REAR STOPLAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Lamp Inoperative
    C2280D-12 CLS18 (GY/BN) — Ground
    RH Rear Lamp Inoperative
    C2280D-15 CLS19 (VT/OG) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to J10 .

No
REPAIR the circuit.
  J10 CHECK THE REAR STOPLAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Lamp
    C498-3 CLS18 (GY/BN) C2280D-12 CLS18 (GY/BN)
    RH Rear Lamp
    C499-3 CLS19 (VT/OG) C2280D-15 CLS19 (VT/OG)



  • Is the resistance less than 3 ohms?
Yes
GO to J11 .

No
REPAIR the circuit.
  J11 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test K: The Stoplamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Stoplamps in Stoplamps .

Refer to Component Description - Stoplamp Switch in Stoplamps .



  BCM DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B132B:15 Left Stop/Turn Lamp: Circuit Short To Battery or Open Sets when the BCM detects a short to voltage from the LH rear stop/turn lamp voltage supply circuit.
B132C:15 Right Stop/Turn Lamp: Circuit Short To Battery or Open Sets when the BCM detects a short to voltage from the RH rear stop/turn lamp voltage supply circuit.
C0040:12 Brake Pedal Switch "A": Circuit Short To Battery Sets when the BCM detects a short to voltage from the stoplamp switch input circuit.



  RFA DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
P1571:12 Brake Switch: Circuit Short To Battery Sets when the RFA module detects a short to voltage from the stoplamp switch input circuit.

 
PINPOINT TEST K: THE STOPLAMPS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  K1 CHECK THE BRAKE SWITCH 2 BCM PID  
  • Ignition ON.
  • Using a scan tool, view BCM PIDs.
  • Monitor the BCM BOO_2 PID while pressing and releasing the brake pedal.
  • Does the PID read On while the brake pedal pressed and Off with the brake pedal released?
Yes
GO to K2 .

No
GO to K3 .
  K2 CHECK THE BCM STOPLAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Ignition ON.
  • Does any stoplamp continue to illuminate?
Yes
REPAIR the affected circuit.

No
GO to K9 .
  K3 CHECK THE STOPLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Stoplamp Switch C278.
  • Do the stoplamps continue to illuminate?
Yes
For vehicles with IA , GO to K4 .

For vehicles is without IA , GO to K5 .

No
INSTALL a new stoplamp switch. REFER to Stoplamp Switch .
  K4 CHECK THE RFA MODULE  
  • Ignition OFF.
  • Disconnect: RFA Module C2153C.
  • Ignition ON.
  • Do the stoplamps continue to illuminate?
Yes
GO to K5 .

No
GO to K7 .
  K5 CHECK THE PCM  
  • Ignition OFF.
  • Disconnect: PCM C175B (3.5L TIVCT).
  • Disconnect: PCM C1381B (3.5L GTDI).
  • Ignition ON.
  • Do the stoplamps continue to illuminate?
Yes
GO to K6 .

No
GO to K8 .
  K6 CHECK THE BCM STOPLAMP SWITCH INPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280B.
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2280B-28 CCB08 (VT/WH) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit.

No
GO to K9 .
  K7 CHECK FOR CORRECT RFA MODULE OPERATION  
  • Disconnect and inspect all the RFA module connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the RFA module connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RFA module. REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  K8 CHECK FOR CORRECT PCM OPERATION  
  • Disconnect and inspect all the PCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the PCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to Section 303-14 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  K9 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test L: The Turn Signal Function Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Turn Signals in Turn Signal and Hazard Lamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1D36:09 Turn Indicator Switch: Component Failure Sets when the SCCM detects an input concern from the multifunction switch.

 
PINPOINT TEST L: THE TURN SIGNAL FUNCTION IS INOPERATIVE
Test Step Result / Action to Take
  L1 CHECK THE COMMUNICATION NETWORK  
  • Ignition ON.
  • Using a scan tool, perform the network test.
  • Does the SCCM pass the network test?
Yes
INSTALL a new multifunction switch. REFER to Section 211-05 . If the concern still exists, INSTALL a new SCCM . REFER to Section 211-05 .

No
REFER to Section 418-00 , The SCCM Does Not Respond To The Scan Tool.
 

Pinpoint Test M: One Turn Signal Lamp Is Inoperative/Always On

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Turn Signals in Turn Signal and Hazard Lamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B123A:11 Left Front Turn Indicator: Circuit Short To Ground Sets when the BCM detects a short to ground from the left front turn lamp voltage supply circuit.
B123A:15 Left Front Turn Indicator: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the left front turn lamp voltage supply circuit.
B123B:11 Right Front Turn Indicator: Circuit Short To Ground Sets when the BCM detects a short to ground from the right front turn lamp voltage supply circuit.
B123B:15 Right Front Turn Indicator: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the right front turn lamp voltage supply circuit.
B1C98:11 Left Corner Lamp Circuit: Circuit Short To Ground Sets when the BCM detects a short to ground from the left cornering lamp voltage supply circuit.
B1C98:15 Left Corner Lamp Circuit: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the left cornering lamp voltage supply circuit.
B1C99:11 Right Corner Lamp Circuit: Circuit Short To Ground Sets when the BCM detects a short to ground from the right cornering lamp voltage supply circuit.
B1C99:15 Right Corner Lamp Circuit: Circuit Short To Battery or Open Sets when the BCM detects an open or short to voltage from the right cornering lamp voltage supply circuit.

 
PINPOINT TEST M: ONE TURN SIGNAL LAMP IS INOPERATIVE/ALWAYS ON
Test Step Result / Action to Take
  M1 DETERMINE IF A TURN LAMP IS ALWAYS ON  
  • Ignition ON.
  • Activate the hazard lamp function.
  • Observe the front and the rear turn lamps.
  • Is any turn lamp always on?
Yes
For front lamps, GO to M2 .

For rear lamps, GO to Pinpoint Test J to diagnose the stop/turn lamps.

No
For front lamps, GO to M3 .

For rear lamps, GO to Pinpoint Test I to diagnose the stop/turn lamps.
  M2 CHECK THE TURN LAMP OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Ignition ON.
  • Does the turn lamp in question continue to illuminate?
Yes
REPAIR the affected circuit.

No
GO to M8 .
  M3 CHECK FOR VOLTAGE TO THE FRONT BULB SOCKET  
  • Ignition OFF.
  • Disconnect: Inoperative LH Front Park/Turn Lamp C1115 or RH Front Park/Turn Lamp C1116.
  • Activate the hazard lamp function.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Turn Lamp
    C1115-5 CLS21 (BU/GN) — Ground
    LH Front Cornering Lamp
    C1115-6 CLS21 (BU/GN) — Ground
    RH Front Turn Lamp
    C1116-5 CLS25 (YE/VT) — Ground
    RH Front Cornering Lamp
    C1116-6 CLS25 (YE/VT) — Ground



  • Does the voltage alternate between 0 and greater than 11 volts?
Yes
GO to M4 .

No
GO to M5 .
  M4 CHECK THE TURN LAMP GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Turn Lamp
    C1115-5 CLS21 (BU/GN) C1115-1 GD123 (BK/GY)
    LH Front Cornering Lamp
    C1115-6 CLS21 (BU/GN) C1115-1 GD123 (BK/GY)
    RH Front Turn Lamp
    C1116-5 CLS25 (YE/VT) C1116-1 GD120 (BK/GN)
    RH Front Cornering Lamp
    C1116-6 CLS25 (YE/VT) C1116-1 GD120 (BK/GN)



  • Does the alternate between 0 and greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
REPAIR the affected circuit.
  M5 CHECK FOR VOLTAGE TO THE FRONT BULB SOCKET  
  • Deactivate the hazard lamp function.
  • Ignition ON.
  • Using a scan tool, clear the DTCs and repeat the BCM self-test (required to enable the turn lamp output driver if DTC U1000:00 is present) .
  • Activate the hazard lamp function.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Turn Lamp
    C1115-5 CLS21 (BU/GN) — Ground
    LH Front Cornering Lamp
    C1115-6 CLS21 (BU/GN) — Ground
    RH Front Turn Lamp
    C1116-5 CLS25 (YE/VT) — Ground
    RH Front Cornering Lamp
    C1116-6 CLS25 (YE/VT) — Ground



  • Does the voltage alternate between 0 and greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
GO to M6 .
  M6 CHECK THE TURN LAMP OUTPUT CIRCUIT FOR A SHORT TO GROUND  
  • Deactivate the hazard lamp function.
  • Ignition OFF.
  • Disconnect: BCM C2280F.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Turn Lamp
    C1115-5 CLS21 (BU/GN) — Ground
    LH Front Cornering Lamp
    C1115-6 CLS21 (BU/GN) — Ground
    RH Front Turn Lamp
    C1116-5 CLS25 (YE/VT) — Ground
    RH Front Cornering Lamp
    C1116-6 CLS25 (YE/VT) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to M7 .

No
REPAIR the circuit.
  M7 CHECK THE BCM TURN LAMP OUTPUT CIRCUIT FOR AN OPEN  
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Turn Lamp
    C1115-5 CLS21 (BU/GN) C2280F-8 CLS21 (BU/GN)
    LH Front Cornering Lamp
    C1115-6 CLS21 (BU/GN) C2280F-9 CLS21 (BU/GN)
    RH Front Turn Lamp
    C1116-5 CLS25 (YE/VT) C2280F-7 CLS25 (YE/VT)
    RH Front Cornering Lamp
    C1116-6 CLS25 (YE/VT) C2280F-10 CLS25 (YE/VT)



  • Is the resistance less than 3 ohms?
Yes
GO to M8 .

No
REPAIR the affected circuit.
  M8 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test N: The Hazard Lamp Function Is Inoperative/Always On

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Hazard Lamps in Turn Signal and Hazard Lamps .



  BCM DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1D35:11 Hazard Switch: Circuit Short to Ground Sets when the BCM detects a short to ground from the hazard lamp function input circuit.

 
PINPOINT TEST N: THE HAZARD LAMP FUNCTION IS INOPERATIVE/ALWAYS ON
Test Step Result / Action to Take
  N1 CHECK THE RECORDED DTCs FROM THE BCM SELF-TEST  
  • Ignition ON.
  • Using a scan tool, perform the BCM self-test.
  • Is DTC B1D35:11 present?
Yes
GO to N2 .

No
GO to N4 .
  N2 ISOLATE THE FCIM AS THE CAUSE OF DTC B1D35:11  
  • Ignition OFF.
  • Disconnect: FCIM C2402.
  • Ignition ON.
  • Using a scan tool, perform the BCM self-test.
  • Is DTC B1D35:11 still present?
Yes
GO to N3 .

No
GO to N6 .
  N3 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Disconnect: BCM C2280B.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2402-4 CLS32 (BN) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to N7 .

No
REPAIR the circuit.
  N4 CHECK FOR A VOLTAGE SIGNAL TO THE FCIM  
  • Disconnect: FCIM C2402.
  • Ignition OFF.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2402-4 CLS32 (BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to N6 .

No
GO to N5 .
  N5 CHECK THE HAZARD FLASHER LAMP REQUEST INPUT CIRCUIT FOR AN OPEN  
  • Disconnect: BCM C2280B.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2402-4 CLS32 (BN) C2280B-32 CLS32 (BN)



  • Is the resistance less than 3 ohms?
Yes
GO to N7 .

No
REPAIR the circuit.
  N6 CHECK FOR CORRECT FCIM OPERATION  
  • Disconnect and inspect the FCIM connector.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the FCIM connector. Make sure it seats correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new FCIM . Refer to the appropriate section in Group 415 for the procedure.

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  N7 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test O: One Or More Parking, Rear or License Plate Lamps Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 92 , Parking, Rear and License Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Parking Lamps in Parking, Rear and License Plate Lamps .

 
PINPOINT TEST O: ONE OR MORE PARKING, REAR OR LICENSE PLATE LAMPS IS INOPERATIVE
Test Step Result / Action to Take
  O1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE  
  • Ignition OFF.
  • Place the headlamp switch in the parking lamps on position.
  • Are all the parking lamps inoperative?
Yes
GO to O9 .

No
If all the front or all the rear parking lamps are inoperative, VERIFY the BCM fuse 30 (15A) and BJB fuse 48 (10A) (front parking lamps) or BCM fuse 40 (10A) (rear parking lamps) is OK. If OK, GO to O2 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

For front parking or side marker lamp   , GO to O3 .

For rear license plate lamp, GO to O5 .

For rear parking lamp, GO to O7 .
  O2 BYPASS THE BCM  

    NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams manual to identify the possible causes of the circuit short.

  • Place the headlamp switch in the off position.
  • Disconnect: BCM C2280E (inoperative front lamps).
  • Disconnect: BCM C2280D (inoperative rear lamps).
  • For inoperative front lamps, connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C2280E-6 CBB30 (YE/BU) — Battery positive



  • For inoperative rear lamps, connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C2280D-18 CLS30 (VT/WH) — Battery positive



  • Do the front or rear parking lamps illuminate?
Yes
REMOVE the jumper wire. GO to O12 .

No
REMOVE the jumper wire. REPAIR BCM front or rear parking lamp output circuit.
  O3 CHECK INOPERATIVE FRONT PARKING OR SIDE MARKER LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Place the headlamp switch in the off position.
  • Disconnect: Inoperative LH Front Lamp C1115 or RH Front Lamp C1116.
  • Disconnect: LH Inoperative Side Marker Lamp, LH Side Marker Lamp C151 (halogen headlamps) or LH Headlamp C1284 ( HID headlamps).
  • Disconnect: RH Inoperative Side Marker Lamp, RH Side Marker Lamp C161 (halogen headlamps) or RH Headlamp C1285 ( HID headlamps).
  • Place the headlamp switch in the parking lamps on position.
  • For inoperative front lamps, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Lamp
    C1115-2 CLS30 (VT/WH) — Ground
    RH Front Lamp
    C1116-2 CLS30 (VT/WH) — Ground



  • For inoperative side marker lamp (halogen headlamps), measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Side Marker Lamp
    C151-7 CLS30 (VT/WH) — Ground
    RH Side Marker Lamp
    C161-7 CLS30 (VT/WH) — Ground



  • For inoperative side marker lamp ( HID headlamps), measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-7 CLS30 (VT/WH) — Ground
    RH Headlamp
    C1285-7 CLS30 (VT/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to O4 .

No
REPAIR the circuit.
  O4 CHECK THE INOPERATIVE FRONT PARKING OR SIDE MARKER LAMP GROUND CIRCUIT FOR AN OPEN  
  • For inoperative front lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Front Lamp
    C1115-2 CLS30 (VT/WH) C1115-1 GD123 (BK/GY)
    RH Front Lamp
    C1116-2 CLS30 (VT/WH) C1116-1 GD120 (BK/GN)



  • For inoperative side marker lamp (halogen headlamps), measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Side Marker Lamp
    C151-7 CLS30 (VT/WH) C151-6 GD123 (BK/GY)
    RH Side Marker Lamp
    C161-7 CLS30 (VT/WH) C161-6 GD120 (BK/GN)



  • For inoperative side marker lamp ( HID headlamps), measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Headlamp
    C1284-7 CLS30 (VT/WH) C1284-6 GD123 (BK/GY)
    RH Headlamp
    C1285-7 CLS30 (VT/WH) C1285-6 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
REPAIR the circuit.
  O5 CHECK INOPERATIVE LICENSE PLATE LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Place the headlamp switch in the off position.
  • Disconnect: Inoperative LH License Plate Lamp C452 or RH License Plate Lamp C462.
  • Place the headlamp switch in the parking lamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH License Plate Lamp
    C452-1 CLS30 (VT/WH) — Ground
    RH License Plate Lamp
    C462-1 CLS30 (VT/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to O6 .

No
REPAIR the circuit.
  O6 CHECK THE INOPERATIVE LICENSE PLATE LAMP GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH License Plate Lamp
    C452-1 CLS30 (VT/WH) C452-2 GD351 (BK/GN)
    RH License Plate Lamp
    C462-1 CLS30 (VT/WH) C462-2 GD351 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
REPAIR the circuit.
  O7 CHECK INOPERATIVE REAR PARKING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Place the headlamp switch in the off position.
  • Disconnect: Inoperative LH Rear Parking Lamp C498 or RH Rear Parking Lamp C499.
  • Place the headlamp switch in the parking lamps on position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Parking Lamp
    C498-2 CLS30 (VT/WH) — Ground
    RH Rear Parking Lamp
    C499-2 CLS30 (VT/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to O8 .

No
REPAIR the circuit.
  O8 CHECK THE INOPERATIVE REAR PARKING LAMP GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Rear Parking Lamp
    C498-3 CLS30 (VT/WH) C498-1 GD351 (BK/GN)
    RH Rear Parking Lamp
    C499-3 CLS30 (VT/WH) C499-1 GD349 (BK/GY)



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
REPAIR the circuit.
  O9 CHECK THE SCCM HEADLAMP SWITCH PIDs  

    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PID.

  • Using a scan tool, view SCCM PIDs.
  • Monitor the SCCM headlamp switch input PID (EXT_LMP_SW) while moving the headlamp switch through all positions (OFF, PARKING LAMPS and HEADLAMPS).
  • Do the headlamp switch positions agree with the PID?
Yes
GO to O12 .

No
GO to O10 .
  O10 CHECK THE HEADLAMP SWITCH  
  • Disconnect: Headlamp SwitchC205.
  • Carry out the headlamp switch component test.

    Refer to Wiring Diagrams Cell 149 , component testing. for component testing.

  • Do the headlamp switch positions agree with the PID?
Yes
GO to O11 .

No
INSTALL a new headlamp switch. REFER to Headlamp Switch .
  O11 CHECK THE HEADLAMP SWITCH PARKING LAMPS CIRCUIT FOR AN OPEN  
  • Disconnect: SCCM C2414A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2414A-6 CLS34 (GY) C205-2 CLS34 (GY)



  • Is the resistance less than 3 ohms?
Yes
GO to O12 .

No
REPAIR the circuit.
  O12 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test P: The Parking, Rear Or License Plate Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 92 , Parking, Rear and License Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Parking Lamps in Parking, Rear and License Plate Lamps .

 
PINPOINT TEST P: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  P1 CHECK IF THE HEADLAMPS ARE ON  
  • Ignition ON.
  • Observe the headlamps.
  • Are the headlamps illuminated?
Yes
GO to Pinpoint Test C .

No
GO to P2 .
  P2 CHECK THE BCM REAR PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Ignition ON.
  • Do the rear parking lamps continue to illuminate?
Yes
REPAIR circuit CLS30 (VT/WH).

No
GO to P3 .
  P3 CHECK THE BCM FRONT PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Ignition ON.
  • Do the front parking lamps continue to illuminate?
Yes
REPAIR circuit CBB30 (YE/BU).

No
GO to P4 .
  P4 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test Q: Both Fog Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 86 , Fog Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Fog Lamps in Fog Lamps .

 
PINPOINT TEST Q: BOTH FOG LAMPS ARE INOPERATIVE
Test Step Result / Action to Take
  Q1 CHECK THE FOG LAMP SWITCH PID  
  • Ignition ON.
  • Using a scan tool, monitor the SCCM fog lamp switch PID (FOG_F_SW) while engaging the fog lamp switch.
  • Does the PID indicate the fog lamp switch is on?
Yes
VERIFY the BCM fuse 47 (15A) is OK. If OK, GO to Q4 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

No
GO to Q2 .
  Q2 CHECK FOR A VOLTAGE SIGNAL TO THE HEADLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-5 CLF21 (GY/VT) — Ground



  • Is the voltage greater than 5 volts?
Yes
INSTALL a new headlamp switch. REFER to Headlamp Switch .

No
GO to Q3 .
  Q3 CHECK THE FOG LAMP REQUEST INPUT CIRCUIT FOR AN OPEN  
  • Disconnect: SCCM C2414A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-6 CLF21 (GY/VT) C2414A-8 CLF21 (GY/VT)



  • Is the resistance less than 3 ohms?
Yes
GO to Q5 .

No
REPAIR circuit.
  Q4 BYPASS THE BCM  

    NOTE: If the fuse in the jumper wire fails, refer to the Wiring Diagrams manual to identify the possible causes of the circuit short.

  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C2280E-5 CLF12 (BN/YE) — Battery positive



  • Do the fog lamps illuminate?
Yes
REMOVE the jumper wire. GO to Q6 .

No
REMOVE the jumper wire. REPAIR circuit CLF12 (BN/YE) for an open.
  Q5 CHECK FOR CORRECT SCCM OPERATION  
  • Disconnect and inspect all the SCCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM . REFER to Section 211-05 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  Q6 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test R: An Individual Fog Lamp Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 86 , Fog Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Fog Lamps in Fog Lamps .

 
PINPOINT TEST R: AN INDIVIDUAL FOG LAMP IS INOPERATIVE
Test Step Result / Action to Take
  R1 CHECK FOR VOLTAGE TO THE FOG LAMP  
  • Ignition OFF.
  • Disconnect: Inoperative LH Fog Lamp C152 or RH Fog Lamp C162.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS ON position and engage the fog lamp switch.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Fog Lamp
    C152-1 CLF12 (BN/YE) — Ground
    RH Fog Lamp
    C162-1 CLF12 (BN/YE) — Ground



  • Is the voltage greater than 11 volts?
Yes
REPAIR circuit GD123 (BK/GY).

No
REPAIR the circuit.
 

Pinpoint Test S: The Fog Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 86 , Fog Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Fog Lamps in Fog Lamps .

 
PINPOINT TEST S: THE FOG LAMPS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  S1 CHECK THE FOG LAMP SWITCH PID  
  • Ignition ON.
  • Enter the following diagnostic mode on the scan tool: SCCM DataLogger.
  • Monitor the SCCM fog lamp switch PID (FOG_F_SW) while turning the fog lamp switch on and off.
  • Does the PID indicate the fog lamp switch is operating correctly?
Yes
GO to S4 .

No
GO to S2 .
  S2 CHECK THE HEADLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Ignition ON.
  • Using a scan tool, monitor the SCCM fog lamp switch PID (FOG_F_SW).
  • Does the PID indicate the fog lamp switch is on?
Yes
GO to S3 .

No
INSTALL a new headlamp switch. REFER to Headlamp Switch .
  S3 CHECK THE FOG LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND  
  • Ignition OFF.
  • Disconnect: SCCM C2414A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-5 CLF21 (GY/VT) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to S6 .

No
REPAIR the circuit.
  S4 CHECK THE BCM FOG LAMP INDICATOR OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280A.
  • Ignition ON.
  • Do the fog lamps continue to illuminate?
Yes
GO to S5 .

No
REPAIR circuit CLF12 (BN/YE) (between the BCM and the headlamp switch) for a short to voltage.
  S5 CHECK THE BCM FOG LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Ignition ON.
  • Do the fog lamps continue to illuminate?
Yes
REPAIR circuit CLF12 (BN/YE) (between the BCM and the fog lamps) for a short to voltage.

No
GO to S7 .
  S6 CHECK FOR CORRECT SCCM OPERATION  
  • Disconnect and inspect all the SCCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM . REFER to Section 211-05 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
  S7 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test T: The Fog Lamps On Indicator Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 86 , Fog Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Fog Lamps in Fog Lamps .

 
PINPOINT TEST T: THE FOG LAMPS ON INDICATOR IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Test Step Result / Action to Take
  T1 CHECK THE HEADLAMP SWITCH  
  • Ignition OFF.
  • Disconnect: Headlamp Switch C205.
  • Ignition ON.
  • Enter the following diagnostic mode on the scan tool: BCM DataLogger.
  • Select the BCM fog lamps active command PID (FOG_LAMPS). Command the fog lamps on.
  • NOTE: Make sure the fog lamps are illuminated when taking a reading.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-10 CLF28 (BN/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new headlamp switch. REFER to Headlamp Switch .

No
GO to T2 .
  T2 CHECK THE BCM FOG LAMP INDICATOR OUTPUT CIRCUIT FOR AN OPEN  
  • Ignition OFF.
  • Disconnect: BCM C2280A.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C205-10 CLF28 (BN/WH) C2280A-2 CLF28 (BN/WH)



  • Is the resistance less than 3 ohms?
Yes
GO to T3 .

No
REPAIR the circuit.
  T3 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test U: All The Reversing Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93 , Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Reversing Lamps in Reversing Lamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1277:11 Reverse Lamp: Circuit Short To Ground Sets when the BCM detects a short to ground from the reversing lamp output circuit.
B1277:15 Reverse Lamp: Circuit Short To Battery or Open Sets when the BCM detects an open from the reversing lamp output circuit.

 
PINPOINT TEST U: ALL THE REVERSING LAMPS ARE INOPERATIVE
Test Step Result / Action to Take
  U1 CHECK THE PARKING LAMP OPERATION  
  • Ignition OFF.
  • Place the headlamp switch in the parking lamps on position.
  • Do the parking lamps illuminate?
Yes
GO to U2 .

No
GO to Symptom Chart - : Parking, Rear And License Plate Lamps .
  U2 CHECK THE BCM OUTPUT  
  • Ignition ON.
  • Using a scan tool, view BCM PIDs.
  • Select the BCM RVRS_LMPS PID. Command the reverse lamps on then off.
  • Do the reversing lamps illuminate when commanded on?
Yes
REFER to Section 307-01 to diagnose the transmission range input.

No
GO to U3 .
  U3 BYPASS THE BCM  

    NOTE: If the jumper wire fails, refer to the Wiring Diagrams manual to identify the possible causes of the circuit short.

  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C2280D-13 CLS28 (BU/WH) — Battery positive



  • Do the reversing lamps illuminate?
Yes
REMOVE the jumper wire. GO to U4 .

No
REMOVE the jumper wire. REPAIR the BCM reverse lamp output circuit for an open.
  U4 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test V: An Individual Reversing Lamp Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93 , Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Reversing Lamps in Reversing Lamps .

 
PINPOINT TEST V: AN INDIVIDUAL REVERSING LAMP IS INOPERATIVE
Test Step Result / Action to Take
  V1 CHECK THE PARKING LAMP OPERATION  
  • Ignition OFF.
  • Place the headlamp switch in the parking lamps on position.
  • Do the parking lamps illuminate?
Yes
GO to V2 .

No
GO to Symptom Chart - : Parking, Rear And License Plate Lamps .
  V2 CHECK THE REVERSING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Ignition OFF.
  • Place the headlamp switch in the OFF position.
  • Disconnect: Inoperative LH Rear Lamp C498 or RH Rear Lamp C499.
  • Ignition ON.
  • Select REVERSE.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Reversing Lamp
    C498-4 CLS28 (BU/WH) — Ground
    RH Reversing Lamp
    C499-4 CLS28 (BU/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new bulb socket.

No
REPAIR the circuit.
 

Pinpoint Test W: The Reversing Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 93 , Reversing Lamps for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Reversing Lamps in Reversing Lamps .



 DTC Fault Trigger Conditions

DTC Description Fault Trigger Conditions
B1277:15 Reverse Lamp: Circuit Short To Battery or Open Sets when the BCM detects a short to voltage from the reversing lamp output circuit.

 
PINPOINT TEST W: THE REVERSING LAMPS ARE ON CONTINUOUSLY
Test Step Result / Action to Take
  W1 CHECK THE BCM CONTROL OF THE REVERSING LAMPS  
  • Ignition ON.
  • Using a scan tool, view BCM PIDs.
  • Select the BCM RVRS_LMPS PID. Command the reverse lamps off.
  • Do the reversing lamps turn off?
Yes
REFER to Section 307-01 to diagnose the transmission range input.

No
GO to W2 .
  W2 CHECK THE BCM OUTPUT  
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Ignition ON.
  • Do the reversing lamps continue to illuminate?
Yes
GO to W3 .

No
GO to W4 .
  W3 CHECK THE REVERSING LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: Auto-Dimming Interior Rear View Mirror C911.
  • Ignition ON.
  • Do the reversing lamps continue to illuminate?
Yes
REPAIR circuit CLS25 (BU/WH).

No
INSTALL a new auto-dimming interior rear view mirror. REFER to Section 501-09 .
  W4 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test X: All the Trailer Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST X: ALL THE TRAILER LAMPS ARE INOPERATIVE

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  X1 CHECK THE TRAILER TOW RELAYS GROUND CIRCUIT FOR AN OPEN  
  • Disconnect: Trailer Tow Parking Lamp Relay.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB84 (GN/RD) 2 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
GO to X2 .

No
REPAIR the circuit.
  X2 CHECK FOR CONTINUITY TO GROUND THROUGH THE TRAILER TOW CONNECTOR  
  • Disconnect: Negative Battery Cable.
  • For the 4-pin connector, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4098-4 RAT08 (WH) — Ground



  • For the 7-pin connector, measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    2 RAT08 (WH) — Ground



  • Is the resistance less than 3 ohms?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
For the 4-pin connector, REPAIR the circuit.

For the 7-pin connector, GO to X3 .
  X3 CHECK THE TRAILER TOW GROUND CIRCUIT FOR AN OPEN  
  • Disconnect: Trailer Tow C4099.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-2 RAT08 (WH) — Ground



  • Is the resistance less than 5 ohms?
Yes
INSTALL a new trailer tow connector.

No
REPAIR the circuit.
 

Pinpoint Test Y: The Trailer Stop/Turn Lamp Is Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST Y: THE TRAILER STOP/TURN LAMP IS INOPERATIVE

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  Y1 DETERMINE IF BOTH TRAILER STOP/TURN LAMPS ARE INOPERATIVE  
  • Ignition OFF.
  • Determine if both trailer stop/turn lamps are inoperative.
  • Are both trailer stop/turn lamps inoperative?
Yes
VERIFY the BJB fuse 63 (15A) is OK. If OK, REPAIR the trailer stop/turn lamp relay voltage supply circuit for an open. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

No
GO to Y2 .
  Y2 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR  
  • For the 4-pin connector, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Trailer Stop/Turn Lamp
    C4098-2 CAT06 (YE) — Ground
    RH Trailer Stop/Turn Lamp
    C4098-1 CAT09 (GN) — Ground



  • For the 7-pin connector, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Trailer Stop/Turn Lamp
    1 CAT06 (YE) — Ground
    RH Trailer Stop/Turn Lamp
    4 CAT09 (GN) — Ground



  • Is the voltage greater than 11 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
For the 4-pin connector, GO to Y4 .

For the 7-pin connector, GO to Y3 .
  Y3 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR  
  • Disconnect: Trailer Tow C4099.
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Trailer Stop/Turn Lamp
    C4099-1 CAT06 (YE) — Ground
    RH Trailer Stop/Turn Lamp
    C4099-4 CAT09 (GN) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow connector.

No
GO to Y4 .
  Y4 CHECK THE TRAILER TOW STOP/TURN RELAY  
  • Disconnect: Trailer Tow Left or Right Stop/Turn Relay.
  • Substitute a known good relay.
  • For the 4-pin connector, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Trailer Stop/Turn Lamp
    C4098-2 CAT06 (YE) — Ground
    RH Trailer Stop/Turn Lamp
    C4098-1 CAT09 (GN) — Ground



  • For the 7-pin connector, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    LH Trailer Stop/Turn Lamp
    C4099-1 CAT06 (YE) — Ground
    RH Trailer Stop/Turn Lamp
    C4099-4 CAT09 (GN) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the known good relay. INSTALL a new trailer tow turn relay.

No
REMOVE the known good relay. GO to Y5 .
  Y5 CHECK FOR VOLTAGE TO THE TRAILER TOW STOP/TURN LAMP RELAY COIL  
  • For LH trailer stop/turn lamp, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    1 CLS18 (GY/BN) — Ground



  • For RH trailer stop/turn lamp, while applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to Y6 .

No
GO to Y8 .
  Y6 CHECK THE TRAILER TOW STOP/TURN LAMP RELAY BJB VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • For LH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    3 SBB63 (WH/RD) — Ground



  • For RH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    3 SBB63 (WH/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to Y7 .

No
REPAIR the circuit.
  Y7 CHECK THE TRAILER TOW STOP/TURN LAMP RELAY GROUND CIRCUIT FOR AN OPEN  
  • For LH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB63 (WH/RD) 2 GD120 (BK/GN)



  • For RH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB63 (WH/RD) 2 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
REPAIR the trailer tow left stop/turn relay output circuit to the trailer tow connector for an open.

No
REPAIR the trailer tow left stop/turn relay ground circuit for an open.
  Y8 PERFORM THE BCM SELF-TEST AND RECHECK FOR VOLTAGE TO THE TRAILER TOW STOP/TURN LAMP RELAY COIL  
  • For LH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS18 (GY/BN) — Ground



  • For RH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow turn relay.

No
GO to Y9 .
  Y9 CHECK THE TRAILER TOW LEFT STOP/TURN LAMP RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND  
  • Disconnect: BCM C2280D.
  • For LH trailer stop/turn lamp, measure the resistance between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS18 (GY/BN) — Ground



  • For RH trailer stop/turn lamp, measure the resistance between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to Y10 .

No
REPAIR the circuit.
  Y10 CHECK THE TRAILER TOW LEFT STOP/TURN LAMP RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS18 (GY/BN) C2280D-12 CLS18 (GY/BN)



  • Measure the resistance between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) C2280D-15 CLS19 (VT/OG)



  • Is the resistance less than 3 ohms?
Yes
GO to Y11 .

No
REPAIR the circuit.
  Y11 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test Z: The Trailer Parking Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST Z: THE TRAILER PARKING LAMPS ARE INOPERATIVE

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  Z1 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR  
  • Ignition OFF.
  • Place the headlamp switch in the PARKING LAMPS ON position.
  • For the 4-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4098-3 CAT17 (BN) — Ground



  • For the 7-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    6 CAT17 (BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
For the 4-pin connector, GO to Z3 .

For the 7-pin connector, GO to Z2 .
  Z2 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (7-PIN)  
  • Disconnect: Trailer Tow C4099.
  • Place the headlamp switch in the PARKING LAMPS ON position.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-6 CAT17 (BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow connector.

No
GO to Z3 .
  Z3 CHECK THE TRAILER TOW PARKING LAMP RELAY  
  • Place the headlamp switch in the OFF position.
  • Disconnect: Trailer Tow Parking Lamp Relay.
  • Substitute a known good relay.
  • Place the headlamp switch in the PARKING LAMPS ON position.
  • For the 4-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4098-3 CAT17 (BN) — Ground



  • For the 7-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-6 CAT17 (BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the known good relay. INSTALL a new trailer tow parking lamp relay.

No
REMOVE the known good relay. GO to Z4 .
  Z4 CHECK THE TRAILER TOW PARKING LAMP RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CBB30 (YE/BU) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to Z5 .

No
REPAIR the circuit.
  Z5 CHECK THE TRAILER TOW PARKING LAMP RELAY BJB VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    3 SBB84 (GN/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to Z6 .

No
VERIFY the BJB fuse 84 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  Z6 CHECK THE TRAILER TOW PARKING LAMP RELAY GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB84 (GN/RD) 2 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
REPAIR the trailer tow parking lamp relay output circuit to the trailer tow connector for an open.

No
REPAIR the trailer tow parking lamp relay ground circuit for an open.
 

Pinpoint Test AA: The Trailer Reversing Lamps Are Inoperative

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST AA: THE TRAILER REVERSING LAMPS ARE INOPERATIVE

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  AA1 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR  
  • Apply the parking brake.
  • Ignition ON.
  • Select REVERSE.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    7 CAT16 (GY/BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
VERIFY the BJB fuse 60 (10A) is OK. If OK, GO to AA2 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AA2 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (VEHICLE HARNESS)  
  • Ignition OFF.
  • Disconnect: Trailer Tow C4099.
  • Apply the parking brake.
  • Ignition ON.
  • Select REVERSE.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-7 CAT16 (GY/BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow connector.

No
GO to AA3 .
  AA3 CHECK THE TRAILER TOW REVERSING LAMP RELAY  
  • Ignition OFF.
  • Disconnect: Trailer Tow Parking Lamp Relay.
  • Substitute a known good relay.
  • Apply the parking brake.
  • Ignition ON.
  • Select REVERSE.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-7 CAT16 (GY/BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the known good relay. INSTALL a new trailer tow reversing lamp relay.

No
REMOVE the known good relay. GO to AA4 .
  AA4 CHECK THE TRAILER TOW REVERSING LAMP RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS28 (BU/WH) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AA5 .

No
REPAIR the circuit.
  AA5 CHECK THE TRAILER TOW REVERSING LAMP RELAY VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Select PARK.
  • Ignition OFF.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    3 SBB60 (GN/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AA6 .

No
REPAIR the circuit.
  AA6 CHECK THE TRAILER TOW REVERSING LAMP RELAY GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB60 (GN/RD) 2 GD120 (BK/GN)



  • Is the voltage greater than 11 volts?
Yes
REPAIR the trailer tow reversing lamp relay output circuit to the trailer tow connector for an open.

No
REPAIR the trailer tow reversing lamp relay ground circuit for an open.
 

Pinpoint Test AB: The Trailer Lamps Are On Continuously

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST AB: THE TRAILER LAMPS ARE ON CONTINUOUSLY

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  AB1 CHECK FOR VOLTAGE AT THE TRAILER TOW CONNECTOR  
  • Ignition ON.
  • For the 4-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4098-1 CAT09 (GN) — Ground
    C4098-2 CAT06 (YE) — Ground
    C4098-3 CAT17 (BN) — Ground



  • For the 7-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    1 CAT06 (YE) — Ground
    4 CAT09 (GN) — Ground
    6 CAT17 (BN) — Ground
    7 CAT16 (GY/BN) — Ground



  • Is any voltage present?
Yes
GO to AB2 .

No
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
  AB2 CHECK THE RELAY OUTPUT CIRCUIT TO THE TRAILER TOW CONNECTOR FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: Suspect Trailer Tow Relay.
  • Ignition ON.
  • For the 4-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4098-1 CAT09 (GN) — Ground
    C4098-2 CAT06 (YE) — Ground
    C4098-3 CAT17 (BN) — Ground



  • For the 7-pin connector, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    1 CAT06 (YE) — Ground
    4 CAT09 (GN) — Ground
    6 CAT17 (BN) — Ground
    7 CAT16 (GY/BN) — Ground



  • Is the trailer tow relay OK?
Yes
REPAIR the circuit in question.

No
For the trailer tow parking or reversing lamps, INSTALL a new trailer tow relay.

For a trailer tow left or right stop/turn lamp, GO to AB3
  AB3 CHECK FOR VOLTAGE TO THE TRAILER TOW RELAY COIL  
  • For LH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    2 CLS18 (GY/BN) — Ground



  • For RH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) — Ground



  • Is any voltage present?
Yes
GO to AB4 .

No
INSTALL a new trailer tow relay.
  AB4 CHECK FOR VOLTAGE TO THE TRAILER TOW RELAY COIL  
  • Ignition OFF.
  • Disconnect: BCM C2280D.
  • Ignition ON.
  • For LH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS18 (GY/BN) — Ground



  • For RH trailer stop/turn lamp, measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CLS19 (VT/OG) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit in question.

No
GO to AB5 .
  AB5 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test AC: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST AC: THE TRAILER BATTERY CHARGING IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  AC1 CHECK FOR VOLTAGE THROUGH THE TRAILER TOW CONNECTOR (BATTERY CHARGE INOPERATIVE)  
  • Start the engine.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    5 CAT14 (OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AC2 .

No
VERIFY the BJB fuse 24 (30A) is OK. If OK, GO to AC5 . If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AC2 CHECK FOR VOLTAGE AT THE TRAILER TOW CONNECTOR (BATTERY CHARGE ALWAYS ON)  
  • Ignition OFF.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    5 CAT14 (OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AC3 .

No
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.
  AC3 CHECK THE TRAILER TOW BATTERY CHARGE RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Disconnect: Trailer Battery Charge Relay.
  • Substitute a known good relay.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    5 CAT14 (OG) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit.

No
GO to AC4 .
  AC4 CHECK FOR VOLTAGE TO THE TRAILER BATTERY CHARGE RELAY COIL (ALWAYS ON)  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CBB93 (GY/BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
VERIFY the BJB fuse 93 (5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.

No
INSTALL a new trailer tow battery charge relay.
  AC5 CHECK FOR VOLTAGE AT THE TRAILER TOW CONNECTOR (BATTERY CHARGE INOPERATIVE)  
  • Ignition OFF.
  • Disconnect: Trailer Tow C4099.
  • Start the engine.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-5 CAT14 (OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow connector.

No
GO to AC6 .
  AC6 CHECK THE TRAILER TOW BATTERY CHARGE RELAY  
  • Ignition OFF.
  • Disconnect: Trailer Tow Battery Charge Relay.
  • Substitute a known good relay.
  • Start the engine.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-5 CAT14 (OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the known good relay. INSTALL a new trailer tow battery charge relay.

No
REMOVE the known good relay. GO to AC7 .
  AC7 CHECK THE TRAILER TOW BATTERY CHARGE RELAY VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    3 SBB24 (VT/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AC8 .

No
VERIFY the BJB fuse 24 (30A) is OK. REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AC8 CHECK THE TRAILER TOW BATTERY CHARGE RELAY COIL VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    1 CBB93 (GY/BN) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AC9 .

No
VERIFY the BJB fuse 93 (5A) is OK. REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AC9 CHECK THE BATTERY CHARGE RELAY COIL GROUND CIRCUIT  
  • Ignition OFF.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Relay Socket Circuit
    3 SBB24 (VT/RD) 2 CDC65 (BN/YE)



  • Is the voltage greater than 11 volts?
Yes
REPAIR the trailer tow battery charge relay output circuit to the trailer tow connector for an open.

No
GO to AC10 .
  AC10 CHECK THE BATTERY CHARGE RELAY COIL GROUND CIRCUIT FOR AN OPEN  
  • Disconnect: BCM C2280F.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Relay Socket Circuit Pin Circuit
    2 CDC66 (BN/YE) C2280F-22 CDC66 (BN/YE)



  • Is the resistance less than 3 ohms?
Yes
GO to AC11 .

No
REPAIR the circuit.
  AC11 CHECK FOR CORRECT BCM OPERATION  
  • Disconnect and inspect all the BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.
  • Is the concern still present?
Yes
CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM . REFER to Section 419-10 .

No
The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
 

Pinpoint Test AD: The Trailer Electric Brakes Are Inoperative/Do Not Operate Correctly

Diagnostic Overview

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Section 100-00 for information about these practices.

Refer to Wiring Diagrams Cell 95 , Trailer/Camper Adapter for schematic and connector information.

Normal Operation and Fault Conditions

Refer to System Operation - Trailer Lamps in Trailer Lamps .

 
PINPOINT TEST AD: THE TRAILER ELECTRIC BRAKES ARE INOPERATIVE/DO NOT OPERATE CORRECTLY

NOTE: Before beginning diagnostics, visually inspect the trailer tow connector mounted on the bumper for signs of corrosion or damage. Repair or install a new trailer tow connector as required.

Test Step Result / Action to Take
  AD1 CHECK THE TBC MODULE FOR A SHORTED OUTPUT  
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    3 CAT19 (BU) — Ground



  • Is any voltage present?
Yes
GO to AD2 .

No
GO to AD3 .
  AD2 CHECK THE TBC MODULE OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE  
  • Ignition OFF.
  • Disconnect: TBC Module C2142.
  • Ignition ON.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    3 CAT19 (BU) — Ground



  • Is any voltage present?
Yes
REPAIR the circuit.

No
INSTALL a new TBC module.
  AD3 CHECK THE TBC MODULE OUTPUT  
  • Set the gain on the TBC module to the maximum setting.
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    3 CAT19 (BU) — Ground



  • Is the voltage greater than 11 volts?
Yes
The vehicle is operating correctly. SEND the trailer to an authorized camper/trailer repair facility.

No
GO to AD4 .
  AD4 CHECK FOR VOLTAGE TO THE TRAILER TOW CONNECTOR (VEHICLE HARNESS)  
  • Disconnect: Trailer Tow C4099.
  • NOTE: Make sure the gain is set to the maximum setting.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-3 CAT19 (BU) — Ground



  • Is the voltage greater than 11 volts?
Yes
INSTALL a new trailer tow connector.

No
GO to AD5 .
  AD5 CHECK THE TBC MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN  
  • Disconnect: TBC Module C2142.
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2142-8 SBB03 (BU/RD) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AD6 .

No
VERIFY the BJB fuse 3 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AD6 CHECK THE TBC MODULE GROUND CIRCUIT FOR AN OPEN  
  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2142-8 SBB03 (BU/RD) C2142-3 GD375 (BK/BU)



  • Is the voltage greater than 11 volts?
Yes
GO to AD7 .

No
REPAIR the circuit.
  AD7 CHECK THE STOPLAMP SWITCH INPUT TO THE TBC MODULE  
  • While applying the brake pedal, measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2142-12 CBP31 (BU/OG) — Ground



  • Is the voltage greater than 11 volts?
Yes
GO to AD8 .

No
VERIFY the BCM fuse 31 (5A) Is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
  AD8 CHECK THE TBC MODULE OUTPUT CIRCUIT FOR A SHORT TO GROUND  
  • Disconnect: BCM C2280B.
  • Measure the resistance between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C2142-14 CAT19 (BU) — Ground



  • Is the resistance greater than 10,000 ohms?
Yes
GO to AD9 .

No
REPAIR the circuit.
  AD9 CHECK THE TBC MODULE OUTPUT CIRCUIT FOR AN OPEN  
  • Connect a fused jumper wire between:


    • Lead 1 Lead 2
    Pin Circuit Pin Circuit
    C2142-14 CAT19 (BU) C2142-8 SBB03 (BU/RD)



  • Measure the voltage between:


    • Positive Lead Negative Lead
    Pin Circuit Pin Circuit
    C4099-3 CAT19 (BU) — Ground



  • Is the voltage greater than 11 volts?
Yes
REMOVE the jumper wire. INSTALL a new TBC module.

No
REMOVE the jumper wire. REPAIR the circuit.