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Home >> Lincoln >> 2013 >> MKS Base, AWD >> 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 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? 
    • Yes  : GO to A2.
    • 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? 
  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 CLN56 (BN/VT) - Ground
      C2065-7 CLN55 (YE/VT) - Ground
      Fig 1: Identifying C2065 Connector Terminals
      G08721105Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to  A9.
    • No  : REPAIR the affected circuit.
  4. A4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH 
    • Disconnect: Instrument Panel Dimmer Switch C2065.
    • Carry out the instrument panel dimmer switch component test. Refer to the OEM COMPONENT TESTING article.
    • Is the instrument panel dimmer switch OK? 
  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 CLN56 (BN/VT) - Ground
      C2065-7 CLN55 (YE/VT) - Ground
      Fig 2: Identifying C2065 Connector Terminals
      G08721106Courtesy of FORD MOTOR CO.
    • Are the voltages approximately 5 volts? 
    • Yes  : GO to  A7.
    • No  : GO to A6.
  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-17 CLN56 (BN/VT) C2065-3 CLN56 (BN/VT)
      C2414A-18 CLN55 (YE/VT) C2065-7 CLN55 (YE/VT)
      Fig 3: Checking Instrument Panel Dimmer Switch Up And Down Input Circuits For Open
      G08616886Courtesy of FORD MOTOR CO.
    • Are the resistances less than 3 ohms? 
    • Yes  : GO to  A9.
    • 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 CLN56 (BN/VT) - Ground
      C2065-4 RLN29 (WH/OG) - Ground
      C2065-7 CLN55 (YE/VT) - Ground
      Fig 4: Identifying SCCM C2414A Connector Terminals
      G08721108Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the affected circuit.
    • No  : GO to A8.
  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 For Open
      G08616886Courtesy of FORD MOTOR CO.
    • Is the resistance less than 3 ohms? 
    • Yes  : GO to A9.
    • 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 CLN56 (BN/VT)
      C2065-2 VLN36 (GY/OG) C2065-4 RLN29 (WH/OG)
      C2065-2 VLN36 (GY/OG) C2065-7 CLN55 (YE/VT)
      C2065-3 CLN56 (BN/VT) C2065-4 RLN29 (WH/OG)
      C2065-3 CLN56 (BN/VT) C2065-7 CLN55 (YE/VT)
      C2065-4 RLN29 (WH/OG) C2065-7 CLN55 (YE/VT)
      Fig 6: Identifying C2065 Connector Terminals
      G08721110Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to A10.
    • No  : REPAIR the affected circuits.
  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? 
    • 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 .
    • 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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