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Pinpoint Test F: A Single Power Window Is Inoperative - Power Sliding 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. F1 CHECK THE VOLTAGE TO THE POWER SLIDING WINDOW 
    • Key in OFF position.
    • Disconnect: Rear Window Adjust Switch C980
    • Key in ON position.
    • Measure the voltage between rear window adjust switch C980-4, circuit 400 (LB/BK) harness side and ground.
      Fig 1: Checking Voltage To Power Sliding Window
      GF0001976Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  F2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  2. F2 CHECK GROUND TO THE REAR WINDOW CONTROL SWITCH  
    • Key in OFF position.
    • Measure the resistances between rear window adjust switch C980-3, circuit 57 (BK) harness side and ground, and between C980-5, circuit 57 (BK) harness side and ground.
      Fig 2: Checking Ground To Rear Window Control Switch
      GF0001977Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F3.
    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.
  3. F3 CHECK THE REAR WINDOW ADJUST SWITCH 
    • Key in ON position.
    • Connect a fused jumper between rear window adjust switch C980-4, circuit 400 (LB/BK) and C980-2, circuit 1941 (YE/LB) harness side; and between rear window adjust switch C980-6, circuit 1942 (RD/YE) and C980-3, circuit 57 (BK) harness side. The rear sliding window should open.
      Fig 3: Checking Rear Window Adjust Switch (1 Of 2)
      GF0001978Courtesy of FORD MOTOR CO.
    • Connect a fused jumper between rear window adjust switch C980-4, circuit 400 (LB/BK) and C980-6, circuit 1942 (RD/YE) harness side; and between rear window adjust switch C980-2, circuit 1941 (YE/LB) and C980-3, circuit 57 (BK) harness side. The rear sliding window should close.
      Fig 4: Checking Rear Window Adjust Switch (2 Of 2)
      GF0001979Courtesy of FORD MOTOR CO.
    • Did the rear power sliding window open and close? 
    1. YES  : INSTALL a new rear window adjust switch. TEST the system for normal operation.
    2. NO  : Go to  F4.
  4. F4 CHECK CIRCUITS 1941 (YE/LB) AND 1942 (RD/YE) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: Rear Sliding Window Motor C3145
    • Key in ON position.
    • Measure the voltage between rear sliding window motor C3145-1, circuit 1941 (YE/LB) harness side and ground, and between C3145-2, circuit 1942 (RD/YE) harness side and ground.
      Fig 5: Checking Circuit 1941 (YE/LB) And Circuit 1942 (RD/YE) For Short To Voltage
      GF0001980Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR the circuit(s). TEST the system for normal operation.
    2. NO  : Go to  F5.
  5. F5 CHECK CIRCUITS 1941 (YE/LB) AND 1942 (RD/YE) FOR A SHORT TO GROUND 
    • Measure the resistance between rear sliding window motor C3145-1, circuit 1941 (YE/LB) harness side and ground; and between C3145-2, circuit 1942 (RD/YE) harness side and ground.
      Fig 6: Checking Circuit 1941 (YE/LB) And Circuit 1942 (RD/YE) For Short To Ground
      GF0001981Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  F6.
    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.
  6. F6 CHECK CIRCUITS 1941 (YE/LB) AND 1942 (RD/YE) FOR AN OPEN 
    • Measure the resistance between rear sliding window motor C3145-1, circuit 1941 (YE/LB) and rear window adjust switch C980-2, circuit 1941 (YE/LB) harness side; and between rear sliding window motor C3145-2, circuit 1942 (RD/YE) and rear window adjust switch C980-6, 1942 (RD/YE) harness side.
      Fig 7: Checking Circuit 1941 (YE/LB) And 1942 (RD/YE) For Open
      GF0001982Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : INSTALL a new rear sliding window motor. REFER to Window Regulator and Motor - Rear  in this article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit(s). TEST the system for normal operation.
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