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Home >> Ford >> 2013 >> Edge SEL, 2.0L Eng VIN 9 >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (Exterior Lighting System) >> Diagnosis And Testing >> Autolamps >> Pinpoint Tests >> Pinpoint Test O: The Autolamps Are On Continuously >> Pinpoint Test O: The AUTOLAMPS Are On Continuously

Pinpoint Test O: The AUTOLAMPS Are On Continuously

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. 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. O1 CHECK THE FLM HEADLAMP SWITCH PIDs 
    NOTE: Make sure the headlamp switch is aligned in the correct position when monitoring the PIDs.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: FLM  DataLogger.
    • While moving the headlamp switch through all positions, monitor the FLM  headlamp switch input PID (LT_SW).

    Do the headlamp switch positions agree with the PID? 

  2. O2 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  O4.

      For DTC B1A85:11, GO to  O8.

    • No  : GO to O3  .
  3. O3 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (NO DTC) 
    • Ignition OFF.
    • Disconnect: Light Sensor C287  (Manual Temperature Control) or C286  (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 C286-2  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 1: Measuring Voltage Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 2: Measuring Voltage Between Light Sensor C287-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  O10.
  4. O4 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:13) 
    • Ignition OFF.
    • Disconnect: Light Sensor C287  (Manual Temperature Control) or C286  (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 C286-2  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 3: Measuring Voltage Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 4: Measuring Voltage Between Light Sensor C287-A, Circuit VLF14 (BU/BN), Harness Side And Ground
      G06065237Courtesy of FORD MOTOR CO.

    Is the voltage approximately 5 volts? 

    • Yes  : GO to  O7.
    • No  : GO to O5  .
  5. O5 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 C286-2  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 5: Measuring Voltage Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 6: Measuring Voltage Between Light Sensor C287-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 O6  .
  6. O6 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • On vehicles with automatic temperature control, measure the resistance between the light sensor C286-2  , circuit VLF14 (BU/BN), harness side and the BCM C2280B-30  , circuit VLF14 (BU/BN), harness side.
      Fig 7: Measuring Resistance Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and the BCM C2280B-30  , circuit VLF14 (BU/BN), harness side.
      Fig 8: Measuring Resistance Between Light Sensor C287-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  O10.
    • No  : REPAIR circuit VLF14 (BU/BN) for an open. TEST the system for normal operation.
  7. O7 CHECK THE LIGHT SENSOR GROUND CIRCUIT FOR AN OPEN 
    • For vehicles with automatic temperature control, measure the voltage between the light sensor C286-2  , circuit VLF14 (BU/BN), harness side and the light sensor C286-4  , circuit GD115 (BK/GY), harness side.
      Fig 9: Measuring Voltage Between Light Sensor C286-2, Circuit VLF14 (BU/BN) And Light Sensor C286-4, Circuit GD115 (BK/GY), Harness Side
      G06403747Courtesy of FORD MOTOR CO.
    • For vehicles with manual temperature control, measure the voltage between the light sensor C287-A  , circuit VLF14 (BU/BN), harness side and the light sensor C287-B  , circuit GD115 (BK/GY), harness side.
      Fig 10: Measuring Voltage Between Light Sensor C287-A, Circuit VLF14 (BU/BN) And Light Sensor C287-B, Circuit GD115 (BK/GY), 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 GD115 (BK/GY) for an open. TEST the system for normal operation.
  8. O8 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC B1A85:11) 
    • Ignition OFF.
    • Disconnect: Light Sensor C287  (Manual Temperature Control) or C286  (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 C286-2  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 11: Measuring Voltage Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 12: Measuring Voltage Between Light Sensor C287-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 O9  .
  9. O9 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 C286-2  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 13: Measuring Resistance Between Light Sensor C286-2, 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 C287-A  , circuit VLF14 (BU/BN), harness side and ground.
      Fig 14: Measuring Resistance Between Light Sensor C287-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 O10  .
    • No  : REPAIR circuit VLF14 (BU/BN) for a short to ground. TEST the system for normal operation.
  10. O10 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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