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Pinpoint Test D: The High Beam(S) Are Always On

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. D1 CHECK THE MULTIFUNCTION SWITCH INPUT 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: SCCM  DataLogger.
    • Monitor the SCCM  multifunction switch PID (HEADLAMP_SW) 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 STEERING COLUMN SWITCHES . TEST the system for normal operation.

      If the concern still exists, INSTALL a new SCCM  . REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.

  2. D2 CHECK THE BCM HIGH BEAM OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: BCM C2280E  .
    • Ignition ON.

    Do the high beams continue to illuminate? 

    • Yes  : GO to D3  .
    • No  : GO to  D4.
  3. D3 CHECK FOR VOLTAGE TO THE HEADLAMP 
    • Ignition OFF.
    • Disconnect: Inoperative Headlamp.
    • Ignition ON.
    • Measure the voltage between the LH headlamp C1021A-3  , circuit CLF02 (GY/BN), harness side and ground; or between the RH headlamp C1041A-3  , circuit CLF03 (VT/OG), harness side and ground.
      Fig 1: Measuring Voltage Between Headlamp C1021A-3 And Ground
      G06065214Courtesy of FORD MOTOR CO.

    Is any voltage present? 

    • Yes  : REPAIR circuit CLF02 (GY/BN) (LH high beam) or circuit CLF03 (RH high beam) for a short to voltage. TEST the system for normal operation.
    • No  : INSTALL a new headlamp assembly. REFER to HEADLAMP ASSEMBLY . TEST the system for normal operation.
  4. D4 CHECK FOR CORRECT BCM OPERATION 
    • 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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