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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 938 (Instrument Cluster System And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test C: The Climate Control Panel Illumination Is Inoperative >> Pinpoint Test C: The Climate Control Panel Illumination Is Inoperative

Pinpoint Test C: The Climate Control Panel Illumination Is Inoperative

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. 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 FOR VOLTAGE ON CIRCUIT 19 (LB/RD) 
    • Key in OFF position.
    • Disconnect: Climate Control Assembly C294c
    • Place the headlamp switch in the PARK position.
    • Move the instrument panel dimmer switch to the full illumination position.
      • Fig 1: Checking Circuit For Voltage
      GF0025794Courtesy of FORD MOTOR CO.
    • Measure the voltage between the climate control assembly C294c-2, circuit 19 (LB/RD), harness side and ground.
    • 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 57 (BK) FOR AN OPEN 
      Fig 2: Checking Circuit For Open
      GF0025795Courtesy of FORD MOTOR CO.
    • Measure the resistance between the climate control assembly C294c-1, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new climate control assembly. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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