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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Exterior Lighting System -- F250-F550 Super Duty) >> Diagnosis & Testing >> Autolamps >> Pinpoint Tests >> Pinpoint Test H: The Autolamps Are On Continuously >> Pinpoint Test H: The AUTOLAMPS Are On Continuously

Pinpoint Test H: The AUTOLAMPS Are On Continuously

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. H1 CHECK THE BCM AUTOLAMP ON REQUEST PID 
    NOTE: Make sure the headlamp switch is lined up in the correct position when monitoring the PID.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SCCM DataLogger.
    • While placing the headlamp switch in the AUTOLAMPS ON and then OFF position, monitor the SCCM headlamp switch input PID.
    • Does the PID indicate ON with the headlamp switch in the AUTOLAMPS ON position and OFF when the headlamp switch is in the OFF position? 
    • Yes  : GO to  H5.
    • No  : GO to H2.
  2. H2 CHECK FOR A VOLTAGE SIGNAL TO THE HEADLAMP SWITCH 
    • Ignition OFF.
    • Disconnect: Headlamp Switch C205.
    • Measure the voltage between the headlamp switch C205-4, circuit CLF19 (VT/GN), harness side and ground.
      Fig 1: Measuring Voltage Between Headlamp Switch C205-4, Circuit CLF19 (VT/GN), Harness Side And Ground
      G06258162Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 5 volts? 
    • Yes  : INSTALL a new headlamp switch. REFER to HEADLAMP SWITCH . TEST the system for normal operation.
    • No  : GO to H3.
  3. H3 CHECK AUTOLAMPS REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND 
    • Disconnect: SCCM C2414A.
    • Measure the resistance between the headlamp switch C205-4, circuit CLF19 (VT/GN), harness side and ground.
      Fig 2: Measuring Resistance Between Headlamp Switch C205-4, Circuit CLF19 (VT/GN), Harness Side And Ground
      G06065234Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to H4.
    • No  : REPAIR circuit CLF19 (VT/GN) for a short to ground. TEST the system for normal operation.
  4. H4 CHECK THE AUTOLAMPS REQUEST INPUT CIRCUIT FOR AN OPEN 
    • Measure the resistance between the headlamp switch C205-4, circuit CLF19 (VT/GN), harness side and the SCCM C2414A-17, circuit CLF19 (VT/GN), harness side.
      Fig 3: Measuring Resistance Between Headlamp Switch C205-4, Circuit CLF19 (VT/GN) And SCCM C2414A-17, Circuit CLF19 (VT/GN), Harness Side
      G07409793Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to  H14.
    • No  : REPAIR circuit CLF19 (VT/GN) for an open. TEST the system for normal operation.
  5. H5 CHECK THE SCCM HEADLAMP SWITCH PIDs 
    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PIDs.
    NOTE: Only one PID should indicate ON at each headlamp switch position.
    • Enter the following diagnostic mode on the scan tool: SCCM DataLogger.
    • While moving the headlamp switch through all positions, monitor the SCCM headlamp switch input (off, parking lamps and headlamps) PIDs.
    • Do the headlamp switch positions agree with the PIDs (with only one PID indicating ON in each position)? 
  6. 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.
  7. H7 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (NO DTC) 
    • Ignition OFF.
    • Disconnect: Light Sensor C286(Manual Temperature Control) or C287(Automatic Temperature Control).
    • Ignition ON.
    • Place the headlamp switch in the AUTOLAMPS ON position.
    • On vehicles with automatic temperature control, measure the voltage between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and ground.
      Fig 4: Measuring Voltage Between Light Sensor C287-2, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065236Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the voltage between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and ground.
      Fig 5: Measuring Voltage Between Light Sensor C286-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065237Courtesy of FORD MOTOR CO.
    • Is the voltage approximately 5 volts? 
    • Yes  : INSTALL a new light sensor. REFER to LIGHT SENSOR . TEST the system for normal operation.
    • No  : GO to  H15.
  8. H8 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:13) 
    • Ignition OFF.
    • Disconnect: Light Sensor C286(Manual Temperature Control) or C287(Automatic Temperature Control).
    • Ignition ON.
    • Place the headlamp switch in the AUTOLAMPS ON position.
    • On vehicles with automatic temperature control, measure the voltage between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and ground.
      Fig 6: Measuring Voltage Between Light Sensor C287-2, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065236Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the voltage between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and ground.
      Fig 7: Measuring Voltage Between Light Sensor C286-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065237Courtesy of FORD MOTOR CO.
    • Is the voltage approximately 5 volts? 
    • Yes  : GO to  H11.
    • No  : GO to H9.
  9. H9 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: BCM C2280B.
    • Ignition ON.
    • On vehicles with automatic temperature control, measure the voltage between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and ground.
      Fig 8: Measuring Voltage Between Light Sensor C287-2, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065236Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the voltage between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and ground.
      Fig 9: Measuring Voltage Between Light Sensor C286-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065237Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit VLF14 (BU/BN) for a short to voltage. TEST the system for normal operation.
    • No  : GO to H10.
  10. H10 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • On vehicles with automatic temperature control, measure the resistance between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and the BCM C2280B-30, circuit VLF14 (BU/BN), harness side.
      Fig 10: Measuring Resistance Between Light Sensor C287-2, Circuit VLF14 (BU/BN) And BCM C2280B-30, Circuit VLF14 (BU/BN), Harness Side
      G07399318Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the resistance between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and the BCM C2280B-30, circuit VLF14 (BU/BN), harness side.
      Fig 11: Measuring Resistance Between Light Sensor C286-A, Circuit VLF14 (BU/BN) And BCM C2280B-30, Circuit VLF14 (BU/BN), Harness Side
      G07399319Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to  H15.
    • No  : REPAIR circuit VLF14 (BU/BN) for an open. TEST the system for normal operation.
  11. H11 CHECK THE LIGHT SENSOR GROUND CIRCUIT FOR AN OPEN 
    • For vehicles with automatic temperature control, measure the voltage between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and the light sensor C287-4, circuit GD184 (BK/GY or BK/YE), harness side.
      Fig 12: Measuring Voltage Between Light Sensor C287-2, Circuit VLF14 (BU/BN) And Light Sensor C287-4, Circuit GD184 (BK/GY Or BK/YE), Harness Side
      G06403747Courtesy of FORD MOTOR CO.
    • For vehicles with manual temperature control, measure the voltage between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and the light sensor C286-B, circuit GD184 (BK/YE), harness side.
      Fig 13: Measuring Voltage Between Light Sensor C286-A, Circuit VLF14 (BU/BN) And Light Sensor C286-B, Circuit GD184 (BK/YE), Harness Side
      G06133775Courtesy of FORD MOTOR CO.
    • Is the voltage approximately 5 volts? 
    • Yes  : INSTALL a new light sensor. REFER to LIGHT SENSOR . TEST the system for normal operation.
    • No  : REPAIR circuit GD184 (BK/GY or BK/YE) for an open. TEST the system for normal operation.
  12. H12 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:11) 
    • Ignition OFF.
    • Disconnect: Light Sensor C286(Manual Temperature Control) or C287(Automatic Temperature Control).
    • Ignition ON.
    • Place the headlamp switch in the AUTOLAMPS ON position.
    • On vehicles with automatic temperature control, measure the voltage between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and ground.
      Fig 14: Measuring Voltage Between Light Sensor C287-2, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065236Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the voltage between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and ground.
      Fig 15: Measuring Voltage Between Light Sensor C286-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065237Courtesy of FORD MOTOR CO.
    • Is the voltage approximately 5 volts? 
    • Yes  : INSTALL a new light sensor. REFER to LIGHT SENSOR . TEST the system for normal operation.
    • No  : GO to H13.
  13. H13 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: BCM C2280B.
    • On vehicles with automatic temperature control, measure the resistance between the light sensor C287-2, circuit VLF14 (BU/BN), harness side and ground.
      Fig 16: Measuring Resistance Between Light Sensor C287-2, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065249Courtesy of FORD MOTOR CO.
    • On vehicles with manual temperature control, measure the resistance between the light sensor C286-A, circuit VLF14 (BU/BN), harness side and ground.
      Fig 17: Measuring Resistance Between Light Sensor C286-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065250Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to  H15.
    • No  : REPAIR circuit VLF14 (BU/BN) for a short to ground. TEST the system for normal operation.
  14. H14 CHECK FOR CORRECT SCCM OPERATION 
    • Disconnect all the SCCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SCCM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new SCCM. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
  15. H15 CHECK FOR CORRECT BCM OPERATION 
    • Ignition OFF.
    • Disconnect all the BCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the BCM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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