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Pinpoint Test G: No Operation In High Blower Setting

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. G1 CHECK THE BLOWER MOTOR SPEED 
    • Key in ON position.
    • Turn the function selector switch to the FLOOR position.
    • Set the blower motor speed to maximum.
    • Does the blower motor operate at maximum speed? 

    Yes:  CYCLE the heater blower motor switch from high to low several times. If the blower motor operates correctly each time, ADVISE the owner of system operation.

    If the blower motor does not operate correctly each time, INSTALL a new blower motor switch. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

    No:  GO to  G2.

  2. G2 CHECK CIRCUIT 261 (OG/BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Blower Motor Resister C293.
    • Disconnect: Blower Motor C2066.
    • Measure the resistance between blower motor C2066-2, circuit 261 (OG/BK), harness side and blower motor switch C294b-a, circuit 261 (OG/BK).
      Fig 1: Checking Circuit 261 (OG/BK) For Open
      G04621428Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes:  INSTALL a new blower motor switch. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

    No:  REPAIR the circuit. TEST the system for normal operation.

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