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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test C: All Dimmable Switch Illumination Is Always On >> Pinpoint Test C: All DIMMABLE Switch Illumination Is Always On

Pinpoint Test C: All DIMMABLE Switch Illumination Is Always On

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. 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. C1 CHECK THE EXTERIOR LIGHTING 
    • Place the headlamp switch in the OFF position.
    • Observe the parking lights.
    • Are the parking lights illuminated? 
    • Yes  : REFER to EXTERIOR LIGHTING to diagnose the exterior lamps always on.
    • No  : GO to C2.
  2. C2 CHECK THE BCM BACKLIGHTING OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: BCM C2280B.
    • Ignition ON.
    • Do the dimmable backlighted components continue to illuminate? 
    • Yes  : REPAIR circuit VLN04 (VT/GY) for a short to voltage. TEST the system for normal operation.
    • No  : GO to C3.
  3. C3 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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