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Pinpoint Test D: A Single Power Window Is Inoperative - LH Rear Window

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. D1 CHECK THE LEFT REAR WINDOW OPERATION FROM THE LH FRONT WINDOW CONTROL SWITCH 
    • Key in ON position.
    • Operate the LH rear window from the LH front window control switch.
    • Does the LH rear window operate from the LH front window control switch? 

    Yes  : GO to D2.

    No  : GO to  D3.

  2. D2 CHECK CIRCUIT 170 (RD/LB) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: LH Rear Window Control Switch C701.
    • Key in ON position.
    • Measure the voltage between LH rear window control switch C701-3, circuit 170 (RD/LB), harness side and ground.
      Fig 1: Checking Circuit 170 (RD/LB) For Voltage
      G04622309Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : INSTALL a new LH rear window control switch. REFER to WINDOW CONTROL SWITCH  in this article. TEST the system for normal operation.

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

  3. D3 CHECK CIRCUITS 884 (YE/BK) AND 885 (YE/LB) FOR VOLTAGE AND GROUND 
    • Key in OFF position.
    • Disconnect: LH Rear Window Motor C703.
    • Key in ON position.
    • Measure the voltage between LH rear window motor C703-a, circuit 884 (YE/BK), harness side and LH rear window motor C703-b, circuit 885 (YE/LB), harness side while operating the LH rear window control switch in the down then up positions.
      Fig 2: Checking Circuits 884 (YE/BK) And 885 (YE/LB) For Voltage And Ground
      G04622310Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts in both switch directions? 

    Yes  : INSTALL a new window regulator and motor. REFER to WINDOW REGULATOR - REAR DOOR  in this article. TEST the system for normal operation.

    No  : GO to D4.

  4. D4 CHECK THE LH REAR WINDOW CONTROL SWITCH 

    Yes  : GO to D5.

    No  : INSTALL a new LH rear window control switch. REFER to WINDOW CONTROL SWITCH  in this article. TEST the system for normal operation.

  5. D5 CHECK CIRCUITS 884 (YE/BK) AND 885 (YE/LB) FOR AN OPEN 
    • Measure the resistance between LH rear window control switch C701-5, circuit 885 (YE/LB), harness side and LH rear window motor C703-b, circuit 885 (YE/LB), harness side; then between LH rear window control switch C701-2, circuit 884 (YE/BK), harness side, and LH rear window motor C703-a, circuit 884 (YE/BK), harness side.
      Fig 3: Checking Circuits 884 (YE/BK) And 885 (YE/LB) For An Open
      G04622311Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes  : GO to D6.

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

  6. D6 CHECK CIRCUITS 884 (YE/BK) AND 885 (YE/LB) FOR A SHORT TO GROUND 
    • Measure the resistance between LH rear window control switch C701-5, circuit 885 (YE/LB), harness side and ground; and between LH rear window control switch C701-2, circuit 884 (YE/BK), harness side and ground.
      Fig 4: Checking Circuits 884 (YE/BK) And 885 (YE/LB) For A Short To Ground
      G04622312Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000? 

    Yes  : GO to D7.

    No  : REPAIR the circuit(s) in question. TEST the system for normal operation.

  7. D7 CHECK CIRCUITS 320 (RD/BK)/316 (YE/LB) AND 319 (YE/BK)/317 (GY/OG) FOR AN OPEN 
    • Disconnect: LH Front Window Control Switch C508.
    • Measure the resistance between LH front window control switch C508-10, circuit 320 (RD/BK), harness side and LH rear window control switch C701-1, circuit 316 (YE/LB) harness side; and between LH front window control switch C508-11, circuit 319 (YE/BK), harness side and LH rear window control switch C701-6, circuit 317 (GY/OG), harness side.
      Fig 5: Checking Circuits 320 (RD/BK)/316 (YE/LB) And 319 (YE/BK)/317 (GY/OG) For An Open
      G04622313Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes  : GO to D8.

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

  8. D8 CHECK CIRCUITS 320 (RD/BK)/316 (YE/LB) AND 319 (YE/BK)/317 (GY/OG) FOR A SHORT TO GROUND 
    • Measure the resistance between LH rear window control switch C701-1, circuit 316 (YE/LB), harness side and ground; and between LH rear window control switch C701-6, circuit 317 (GY/OG), harness side and ground.
      Fig 6: Checking Circuits 320 (RD/BK)/316 (YE/LB) And 319 (YE/BK)/317 (GY/OG) For A Short To Ground
      G04622314Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes  : INSTALL a new LH front window control switch. REFER to WINDOW CONTROL SWITCH  in this article. TEST the system for normal operation.

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

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