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Home >> Lincoln >> 2014 >> MKT Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Instrument Cluster Illumination And Panel Illumination >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test A: All Dimmable Illumination Does Not Dim >> Pinpoint Test A: All DIMMABLE Illumination Does Not Dim

Pinpoint Test A: All DIMMABLE Illumination Does Not Dim

  1. A1 CHECK THE RECORDED RESULTS FROM THE SCCM ON-DEMAND SELF-TEST 
    • Ignition OFF.
    • Using a scan tool, perform the SCCM self-test.

    Is DTC B1124:09 present? 

    1. Yes  : GO to A2  .
    2. No  : GO to  A4.
  2. A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 
    • Disconnect: Instrument Panel Dimmer Switch C2065  .
    • Ignition ON.
    • Using a scan tool, clear the DTCs and perform the SCCM self-test.

    Is DTC B1124:09 still present? 

    1. Yes  : GO to A3  .
    2. No  : INSTALL a new instrument panel dimmer switch. REFER to INSTRUMENT PANEL DIMMER SWITCH .
  3. A3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: SCCM C2414A  .
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2065-2  VLN36 (GY/OG) - Ground
      C2065-3  CLN55 (YE/VT) - Ground
      C2065-7  CLN56 (BN/VT) - Ground
      Fig 1: Identifying SCCM Connector Pin
      G09690743Courtesy of FORD MOTOR CO.
  4. A4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 

    Is the instrument panel dimmer switch OK? 

    1. Yes  : GO to A5  .
    2. No  : INSTALL a new instrument panel dimmer switch. REFER to INSTRUMENT PANEL DIMMER SWITCH .
  5. A5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH UP AND DOWN INPUT CIRCUITS FOR VOLTAGE 
    • Ignition ON.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2065-3  CLN55 (YE/VT) - Ground
      C2065-7  CLN56 (BN/VT) - Ground
    • Fig 2: Identifying Instrument Panel Dimmer Switch Connector Pin
      G09690744Courtesy of FORD MOTOR CO.
  6. A6 CHECK THE INSTRUMENT PANEL DIMMER SWITCH UP AND DOWN INPUT CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: SCCM C2414A  .
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2414A-18  CLN55 (YE/VT) C2065-3  CLN55 (YE/VT)
      C2414A-17  CLN56 (BN/VT) C2065-7  CLN56 (BN/VT)
      Fig 3: Checking Instrument Panel Dimmer Switch Up And Down Input Circuits
      G08616886Courtesy of FORD MOTOR CO.

    Are the resistances less than 3 ohms? 

    1. Yes  : GO to  A9.
    2. No  : REPAIR the affected circuit.
  7. A7 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT AND RETURN CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: SCCM C2414A  .
    • Ignition ON.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2065-2  VLN36 (GY/OG) - Ground
      C2065-3  CLN55 (YE/VT) - Ground
      C2065-7  CLN56 (BN/VT) - Ground
      Fig 4: Identifying Instrument Panel Dimmer Switch Connector Pin
      G09690746Courtesy of FORD MOTOR CO.
  8. A8 CHECK THE INSTRUMENT PANEL DIMMER SWITCH RETURN CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2414A-15  RLN29 (WH/OG) C2065-4  RLN29 (WH/OG)
      Fig 5: Checking Instrument Panel Dimmer Switch Return Circuit
      G08616886Courtesy of FORD MOTOR CO.

    Is the resistance less than 3 ohms? 

    1. Yes  : GO to A9  .
    2. No  : REPAIR the circuit.
  9. A9 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT AND RETURN CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2065-2  VLN36 (GY/OG) C2065-3  CLN55 (YE/VT)
      C2065-2  VLN36 (GY/OG) C2065-4  RLN29 (WH/OG)
      C2065-2  VLN36 (GY/OG) C2065-7  CLN56 (BN/VT)
      C2065-3  CLN55 (YE/VT) C2065-4  RLN29 (WH/OG)
      C2065-3  CLN55 (YE/VT) C2065-7  CLN56 (BN/VT)
      C2065-4  RLN29 (WH/OG) C2065-7  CLN56 (BN/VT)
      Fig 6: Identifying Instrument Panel Dimmer Switch Connector Pin
      G09690748Courtesy of FORD MOTOR CO.
  10. A10 CHECK FOR CORRECT SCCM OPERATION 
    • Disconnect and inspect all the SCCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the SCCM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes  : CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM. REFER to STEERING COLUMN SWITCHES .
    2. No  : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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