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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1914 (Windows And Glass -- F250-F550 Super Duty) >> Diagnostic Tests >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test C: A Single Power Window Is Inoperative - LH Front >> Pinpoint Test C: A Single Power Window Is Inoperative - LH Front

Pinpoint Test C: A Single Power Window Is Inoperative - LH Front

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.
  1. C1 CHECK THE LH FRONT POWER WINDOW DOWN OPERATION 
    • Key in OFF position.
    • Disconnect: LH Front Window Control Switch C504a
    • Connect a jumper wire between LH front window control switch C504a-8, circuit 992 (WH/BK) and ground; and between LH front window control switch C504a-7, circuit 991 (TN/LB) and positive battery terminal.
      Fig 1: Checking LH Front Power Window Down Operation
      GF0005145Courtesy of FORD MOTOR CO.
    • Does the LH front window move down? 
    1. YES  : INSTALL a new LH front window control switch. REFER to Window Control Switch  in this article.
    2. NO  : REMOVE the jumper wires. Go to  C2.
  2. C2 CHECK CIRCUIT 991 (TN/LB) AND 992 (WH/BK) FOR AN OPEN 
    • Disconnect: LH Front Window Motor C524
    • Measure the resistance between LH front window motor C524-2, circuit 991 (TN/LB) harness side and LH front window control switch C504a-7, circuit 991 (TN/LB) harness side; and between LH front window motor C524-1, circuit 992 (WH/BK) harness side and LH front window control switch C504a-8, circuit 992 (WH/BK) harness side.
      Fig 2: Checking Circuit 991 (TN/LB) And 992 (WH/BK) For Open
      GF0005146Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  C3.
    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.
  3. C3 CHECK THE VOLTAGE TO THE LH FRONT POWER WINDOW MOTOR - UP CONDITION 
    • Connect: LH Front Window Control Switch C504a
    • Key in ON position.
    • While pressing the LH front window control switch to the UP position, measure the voltage between LH front window motor C524-1, circuit 992 (WH/BK) harness side and ground.
      Fig 3: Checking Voltage To LH Front Power Window Motor - Up Condition
      GF0005147Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new LH front window motor. REFER to Window Regulator Motor - Front Door  in this article. TEST the system for normal operation.
    2. NO  : Go to  C4.
  4. C4 CHECK THE VOLTAGE TO THE LH FRONT WINDOW MOTOR - DOWN CONDITION 
    • Depress the DOWN position and hold on the LF window control switch.
    • While pressing the LH front window control switch to the DOWN position, measure the voltage between LH front power window motor C524-2, circuit 991 (TN/LB) harness side and ground.
      Fig 4: Checking Voltage To LH Front Window Motor Down Condition
      GF0005148Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new LH front window motor. REFER to Window Regulator Motor - Front Door  in this article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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