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Home >> Lincoln >> 2011 >> Navigator L RWD >> 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 D: All Dimmable Illumination Does Not Dim >> Pinpoint Test D: All DIMMABLE Illumination Does Not Dim

Pinpoint Test D: All DIMMABLE Illumination Does Not Dim

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 INSTRUMENT PANEL DIMMER SWITCH 
    • Ignition OFF.
    • Disconnect: Instrument Panel Dimmer Switch C2065.
    • Carry out the component test for the instrument panel dimmer switch.

      Refer to ENGINE CONTROLS - COMPONENT TESTING for component testing.

    • Is the instrument panel dimmer switch OK? 
    • Yes:  Go to D2  .
    • No:  INSTALL a new instrument panel dimmer switch. Refer to INSTRUMENT PANEL DIMMER SWITCH  in this information CLEAR the DTCs. REPEAT the self-test.
  2. D2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: SJB  C2280d.
    • Ignition ON.
    • Measure the voltage between the instrument panel dimmer switch C2065-6, circuit CLN27 (WH/BN), harness side and ground.
      Fig 1: Measuring Voltage Between Instrument Panel Dimmer Switch C2065-6, Circuit CLN27 (WH/BN) And Ground
      G07456633Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit CLN27 (WH/BN) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
    • No:  Go to D3  .
  3. D3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH RETURN CIRCUIT FOR A SHORT TO VOLTAGE 
    • Measure the voltage between the instrument panel dimmer switch C2065-4, circuit RLN29 (WH/OG), harness side and ground.
      Fig 2: Measuring Voltage Between Instrument Panel Dimmer Switch C2065-4, Circuit RLN29 (WH/OG) And Ground
      G07456634Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR circuit RLN29 (WH/OG) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.
    • No:  Go to D4  .
  4. D4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between the instrument panel dimmer switch C2065-6, circuit CLN27 (WH/BN), harness side and the SJB C2280b-34, circuit CLN27 (WH/BN), harness side.
      Fig 3: Measuring Resistance Between Instrument Panel Dimmer Switch C2065-6 And SJB C2280B-34, Circuit CLN27 (WH/BN)
      G07456635Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  Go to D5  .
    • No:  REPAIR circuit CLN27 (WH/BN) for an open. CLEAR the DTCs. REPEAT the self-test.
  5. D5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH RETURN CIRCUIT FOR AN OPEN 
    • Measure the resistance between the instrument panel dimmer switch C2065-4, circuit RLN29 (WH/OG), harness side and the SJB  C2280b-33, circuit RLN29 (WH/OG), harness side.
      Fig 4: Measuring Resistance Between Instrument Panel Dimmer Switch C2065-4 And SJB C2280B-33, Circuit RLN27 (WH/OG)
      G07456636Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  Go to D6  .
    • No:  REPAIR circuit RLN29 (WH/OG) for an open. CLEAR the DTCs. REPEAT the self-test.
  6. D6 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between the instrument panel dimmer switch C2065-6, circuit CLN27 (WH/BN), harness side and ground.
      Fig 5: Measuring Resistance Between Instrument Panel Dimmer Switch C2065-6, Circuit CLN27 (WH/BN) And Ground
      G07456637Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  Go to D7  .
    • No:  REPAIR circuit CLN27 (WH/BN) for a short to ground. TEST the system for normal operation.
  7. D7 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 MODULE . 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. CLEAR the DTCs. REPEAT the self-test.
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