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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 716 (Windows And Glass - F-150 & Mark LT) >> Diagnostic Tests >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test B: A Single Power Window is Inoperative - Driver Front Window >> Pinpoint Test B: A Single Power Window Is Inoperative - Driver Front Window

Pinpoint Test B: A Single Power Window Is Inoperative - Driver Front Window

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.
  1. B1 CHECK THE DRIVER POWER WINDOW DOWN OPERATION 
    • Key in OFF position.
    • Disconnect: Driver Window Control Switch C535 (regular cab) or C504a (SuperCab or SuperCrew)
    • Connect a fused jumper wire between driver window control switch C535-5 (regular cab) or C504a-5 (SuperCab or SuperCrew), circuit 992 (WH/BK) and ground; and between driver window control switch C535-6 (regular cab) or C504a-6 (SuperCab or SuperCrew), circuit 991 (TN/LB) and the positive battery terminal.
      Fig 1: Checking Driver Power Window Down Operation
      GF0001944Courtesy of FORD MOTOR CO.
    • Does the driver power window go up? 
    1. YES  : Go to  B2.
    2. NO  : REMOVE the jumper wires. Go to  B3.
  2. B2 CHECK THE DRIVER POWER WINDOW UP OPERATION 
    • Connect a fused jumper wire between driver window control switch C535-6 (regular cab) or C504a-6 (SuperCab or SuperCrew), circuit 991 (TN/LB) and ground; and between driver window control switch C535-5 (regular cab) or C504a-5 (SuperCab or SuperCrew) circuit 992 (WH/BK) and the positive battery terminal.
      Fig 2: Checking Driver Power Window Up Operation
      GF0001945Courtesy of FORD MOTOR CO.
    • Does the driver power window go down? 
    1. YES  : INSTALL a new window control switch. REFER to Window Control Switch - Front  in this article. TEST the system for normal operation.
    2. NO  : REMOVE the jumper wires. Go to  B3.
  3. B3 CHECK CIRCUIT 991 (TN/LB) FOR AN OPEN 
    • Disconnect: Driver Power Window Motor C524
    • Measure the resistance between driver power window motor C524-2, circuit 991 (TN/LB) and driver window control switch C535-6 (regular cab) or C504a-6 (SuperCab or SuperCrew), circuit 991 (TN/LB) harness side.
      Fig 3: Checking Circuit 991 (TN/LB) For Open
      GF0001946Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. B4 CHECK CIRCUIT 992 (WH/BK) FOR AN OPEN 
    • Measure the resistance between driver power window motor C535-5 (regular cab) or C524-1, circuit 992 (WH/BK) and driver window control switch C504a-5 (SuperCab or SuperCrew), circuit 992 (WH/BK) harness side.
      Fig 4: Checking Circuit 992 (WH/BK) For Open
      GF0001947Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new driver power window motor. REFER to Window Regulator and 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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