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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 840 (Instrument Cluster System (F250-F550)) >> Diagnostic Tests >> Instrument Cluster (IC) >> Pinpoint Tests >> Pinpoint Test P: The LH Turn Indicator Is Never On >> Pinpoint Test P: The LH Turn Indicator Is Never On

Pinpoint Test P: The LH Turn Indicator Is Never On

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. P1 VERIFY TURN SIGNAL OPERATION 
    • Verify the LH turn signal operation.
    • Does the LH turn signal operate correctly? 
    1. YES  : Go to  P2.
    2. NO  : REFER to EXTERIOR LIGHTING article to continue diagnosis of the turn signals.
  2. P2 CHECK CIRCUIT 3 (LG/WH) FOR VOLTAGE 
    • Disconnect: Instrument Cluster C220a
    • Key in ON position.
    • Place the multifunction switch in the LH TURN position.
      • Fig 1: Checking Circuit For Voltage
      GF0008183Courtesy of FORD MOTOR CO.
    • Measure the voltage between the instrument cluster C220a-1, circuit 3 (LG/WH), harness side and ground.
    • Does the voltage fluctuate between 0 and greater than 10 volts? 
    1. YES  : Go to  P3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. P3 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Key in OFF position.
      • Fig 2: Checking Circuit For Open
      GF0008182Courtesy of FORD MOTOR CO.
    • Measure the resistance between the instrument cluster C220a-10, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  P4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. P4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 
    • Disconnect all the instrument cluster connectors.
    • Check for:
      • corrosion
      • damaged pins
      • 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? 
    1. YES  : INSTALL a new instrument cluster. REFER to Instrument Cluster (IC) . 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. TEST the system for normal operation.
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