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Home >> Ford >> 2009 >> Taurus Limited, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster Illumination & Instrument Panel Illumination >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: The Control Illumination Is Inoperative - All Hardwired Illumination >> Pinpoint Test A: The Control Illumination Is Inoperative - All Hardwired Illumination

Pinpoint Test A: The Control Illumination Is Inoperative - All Hardwired Illumination

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.
    • Is DTC B2A32 or B2A33 recorded? 
    1. YES  : Go to  A3.
    2. NO  : Go to  A2.
  2. A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
    • Monitor the SJB dimmer switch PID (DIM_SW3) while rotating the instrument panel dimmer switch from the lowest setting to the highest setting.
    • Does the PID indicate the switch is operating correctly? 
    1. YES  : Go to  A4.
    2. NO  : INSTALL a new instrument panel dimmer switch. REFER to Headlamp Switch in EXTERIOR LIGHTING article. CLEAR the DTCs. REPEAT the self-test.
  3. A3 CHECK THE ILLUMINATION OUTPUT CIRCUIT VLN04 (VT/GY) 
    NOTE: If the fuse in the jumper wire fails, repair circuit VLN04 (VT/GY) for a short to ground.
    • Key in OFF position.
    • Disconnect: SJB C2280b
    • Connect a fused (5A) jumper wire between the SJB C2280b-39, circuit VLN04 (VT/GY) and battery positive.
      • Fig 1: Checking Circuit
      GF0023318Courtesy of FORD MOTOR CO.
    • Do the backlighting components illuminate? 
    1. YES  : REMOVE the jumper wire. Go to  A4.
    2. NO  : REMOVE the jumper wire. VERIFY the SJB fuse 10 (15A) is OK. REPAIR the circuit. RUN the on-demand self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. 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? 
    1. YES  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. 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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