LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 163 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: All Dimmable Illumination Is Inoperative >> Pinpoint Test A: All DIMMABLE Illumination Is Inoperative

Pinpoint Test A: All DIMMABLE Illumination Is Inoperative

WARNING: This page is about a different car, the 2013 Ford Mustang. 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. A1 CHECK FOR RECORDED SJB DTCs FROM THE ON-DEMAND SELF-TEST 
    • Use the recorded results from the SJB self-test.
    • Are any DTCs recorded? 
  2. A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 
    • Ignition OFF.
    • Disconnect: Instrument Panel Dimmer Switch C2298.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Do the dimmable components illuminate? 
    • Yes  : INSTALL a new instrument panel dimmer switch. REFER to INSTRUMENT PANEL DIMMER SWITCH . TEST the system for normal operation.
    • No  : GO to A3.
  3. A3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND 
    • Place the headlamp switch in the OFF position.
    • Disconnect: SJB C2280b.
    • Measure the resistance between the instrument panel dimmer switch C2298-1, circuit VLN18 (BU/WH), harness side and ground.
      Fig 1: Measuring Resistance Between Instrument Panel Dimmer Switch C2298-1, Circuit VLN18 (BU/WH) And Ground
      G06141622Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to A4.
    • No  : REPAIR circuit VLN18 (BU/WH) for a short to ground. TEST the system for normal operation.
  4. A4 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB 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 SJB. 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. RUN the on-demand self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
scientia non olet · About LEMON Manuals