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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster And Panel Illumination >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: All Control Illumination Sources Do Not Dim >> Pinpoint Test E: All Control Illumination Sources Do Not Dim

Pinpoint Test E: All Control Illumination Sources Do Not Dim

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
    • Monitor the SJB dimmer switch status (DSWSTAT) PID while rotating the instrument panel dimmer switch from the lowest setting to the highest setting.
    • Monitor the SJB DSWSTAT PID while rotating the instrument panel dimmer switch to the COURTESY LAMPS ON position.
    • Does the DSWSTAT PID indicate the switch is operating correctly? 
    1. YES  : Go to  E5.
    2. NO  : If the PID indicates correctly in the COURTESY LAMPS ON position only, go to  E2.

      If the PID indicates incorrectly in all positions, REPAIR circuit CLN27 (WH/BN) for an open. CLEAR the DTCs. TEST the system for normal operation.

      If the system still does not operate correctly, go to  E5.

  2. E2 CHECK CIRCUIT VLN18 (BU/WH) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: SJB C2280d
    • Disconnect: Instrument Panel Dimmer Switch C2065
      • Fig 1: Checking Circuit VLN18 (BU/WH) For A Short To Voltage
      GF0041616Courtesy of FORD MOTOR CO.
    • Measure the voltage between the instrument panel dimmer switch C2065-1, circuit VLN18 (BU/WH), harness side and ground.
    • Is there any voltage indicated? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  E3.
  3. E3 CHECK CIRCUIT VLN18 (BU/WH) FOR AN OPEN OR SHORT TO GROUND 
      Fig 2: Checking Circuit VLN18 (BU/WH) For An Open Or Short To Ground
      GF0041617Courtesy of FORD MOTOR CO.
    • Measure the resistance between the instrument panel dimmer switch C2065-1, circuit VLN18 (BU/WH), harness side and the SJB C2280d-12, circuit VLN18 (BU/WH); and between the instrument panel dimmer switch C2065-1, circuit VLN18 (BU/WH), harness side and ground.
    • Is the resistance less than 5 ohms between the instrument panel dimmer switch and the SJB, and greater than 10,000 ohms between the instrument panel dimmer switch and ground? 
    1. YES  : Go to  E4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. E4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 
    • Carry out the component test for the instrument panel dimmer switch. Refer to COMPONENT TESTING.
    • Is the instrument panel dimmer switch OK? 
    1. YES  : Go to  E5.
    2. NO  : INSTALL a new instrument panel dimmer switch. REFER to Instrument Panel Dimmer Switch . TEST the system for normal operation.
  5. E5 CHECK FOR CORRECT SJB OPERATION 
    • Connect: Instrument Panel Dimmer Switch C2065
    • 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.
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