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Home >> Ford >> 2010 >> Taurus Limited, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster Illumination And Panel Illumination >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test B: All Dimmable Switch Illumination Is Inoperative >> Pinpoint Test B: All DIMMABLE Switch Illumination Is Inoperative

Pinpoint Test B: All DIMMABLE Switch Illumination Is Inoperative

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. B1 CHECK FOR RECORDED SJB DTCs FROM THE ON-DEMAND SELF-TEST 
    • Use the recorded results from the SJB  self-test.
    • Is DTC B2A32 present? 
    1. Yes  : GO to B2  .
    2. No  : VERIFY the SJB  fuse 10 (15A) is OK. If OK, GO to B2  .

      If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short.

      After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the backlighting output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB  . REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.

  2. B2 BYPASS THE SJB 
    NOTE: If the jumper wire fails, refer to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short. After the repair:
    If no DTCs are present, test the system for normal operation.
    If DTC B106E is present, Clear the DTCs and  repeat the self-test (required to enable the backlighting output driver if DTC B106E is present).  Test the system for normal operation.
    If DTC B106F is present, install a new SJB  . Refer to MULTIFUNCTION ELECTRONIC MODULES . Test the system for normal operation.
    • Ignition OFF.
    • Disconnect: SJB  C2280b.
    • Connect a fused jumper wire between the SJB  C2280b-39, circuit VLN04 (VT/GY) and battery positive.
      Fig 1: Checking Circuit VLN04 For An Open
      G06064792Courtesy of FORD MOTOR CO.
    • Do the backlighting components illuminate? 
    1. Yes  : REMOVE the jumper wire. GO to B3  .
    2. No  : REMOVE the jumper wire. REPAIR circuit VLN04 (VT/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
  3. B3 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? 
    1. Yes  : INSTALL a new SJB  . REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
    2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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