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Home >> Lincoln >> 2013 >> Navigator Base, 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 the OEM WIRING DIAGRAMS 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 , 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), Harness Side And Ground
      G06064794Courtesy 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
      G06064793Courtesy 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, Circuit CLN27 (WH/BN) And Harness Side
      G06133393Courtesy 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, Circuit RLN29 (WH/OG) And Harness Side
      G06133394Courtesy 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), Harness Side And Ground
      G06390625Courtesy 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 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. CLEAR the DTCs. REPEAT the self-test.
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