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Home >> Ford >> 2002 >> Taurus SES, 3.0 S >> Repair and Diagnosis >> External Pages >> Different car >> Section 2119 (Instrument Cluster System And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test C: The Climate Control Illumination Is Inoperative >> Pinpoint Test C: The Climate Control Illumination Is Inoperative

Pinpoint Test C: The Climate Control Illumination Is Inoperative

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. 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. C1 CHECK CIRCUIT 19 (LB/RD) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Climate Control Assembly (Automatic A/C) C228a
    • Disconnect: Climate Control Assembly (Manual A/C) C294a
    • Turn the parking lamps on, and rotate the dimmer switch to the full illumination position.
    • Measure the voltage between the manual climate control C294a-2, circuit 19 (LB/RD), harness side and ground or between the automatic climate control C228a-2, circuit 19 (LB/RD), harness side and ground.
      • Fig 1: Checking Circuit 19 (LB/RD) For Voltage
      GF0004429Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  2. C2 CHECK CIRCUIT 875 (BK/LB) FOR AN OPEN 
    • Turn the parking lamps off.
    • Measure the resistance between the manual climate control C294a-1, circuit 875 (BK/LB), harness side and ground or between the automatic climate control C228a-1, circuit 875 (BK/LB), harness side and ground.
      • Fig 2: Checking Circuit 875 (BK/LB) For An Open
      GF0004430Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. C3 CHECK FOR CORRECT CLIMATE CONTROL MODULE OPERATION 
    • Disconnect all the climate control module connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the climate control module 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 climate control module. REFER to CLIMATE CONTROL 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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