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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 476 (Instrument Cluster System) >> Diagnosis And Testing >> Instrument Cluster >> Pin Point Tests >> Pin Point Test U: The Instrument Cluster Is Inoperative >> Pin Point Test U: The Instrument Cluster Is Inoperative

Pin Point Test U: The Instrument Cluster Is Inoperative

WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. U1 CHECK THE INSTRUMENT CLUSTER POWER SUPPLY 
    • Key in OFF position.
    • Disconnect: Instrument Cluster C220a, C220b.
    • Key in ON position.
    • Measure the voltage between the instrument cluster, harness side and ground as follows:
      INSTRUMENT CLUSTER CONNECTOR-PIN REFERENCE

      Instrument Cluster Connector-Pin Circuit
      C220a-13 640 (RD/YE)
      C220a-22 1002 (BK/PK)
      C220b-19 3049 (BK/LG)
    • Are the voltages greater than 10 volts? 

    Yes  : GO to U2.

    No  : VERIFY the central junction box (CJB) fuse(s) 2 (10A), 33 (15A), and 45 (10A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

  2. U2 CHECK CIRCUITS 57 (BK) AND 676 (PK/OG) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the instrument cluster, harness side and ground as follows:
      INSTRUMENT CLUSTER CONNECTOR-PIN REFERENCE

      Instrument Cluster Connector-Pin Circuit
      C220a-10 57 (BK)
      C220b-12 676 (PK/OG)
    • Are the resistances less than 5 ohms? 

    Yes  : GO to U3.

    No  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

  3. U3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 
    • Disconnect all the instrument cluster connectors.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect all the instrument cluster 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 instrument cluster. REFER to INSTRUMENT CLUSTER . 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. TEST the system for normal operation.

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