9-3 1999

Window Systems

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Power Windows



Diagnosis & Testing
  1. Check the wiring harness, connectors and ground connections.
  2.  
  3. Measure voltage to check for open circuits by performing the following:
    1. Engage the load
    2.  
    3. Set the multi-meter to voltage measurement and connect its minus cable to a good grounding point
    4.  
    5. Connect the voltmeter positive cable to the point where the voltage is to be tested
    6.  
    7. On the output side of a switch/control module, it is best to start there and then gradually move out towards the load
    8.  
    9. The break point in the circuit has been passed when the voltage disappears
    10.  
    11. On the input side of a switch/control module/consumer, it is best to start at the closest point to the power source (often the fuse) and then gradually move towards the switch/control module/consumer
    12.  
    13. The break point in the circuit has been passed when the voltage disappears
    14.  

  4.  
  5. Measure resistance to check for open circuits by performing the following:
    1. Make sure the component or lead being tested is not carrying a current (e.g. by removing the associated fuse)
    2.  
    3. Set the multi-meter to resistance measurement and connect it across the component/lead being tested
    4.  
    5. Move the wiring harness in question while observing the ohmmeter
    6.  
    7. The resistance of the wiring harness should normally be less than 1 ohm. A specified value applies to components
    8.  

  6.  
  7. Check for short circuits to ground by performing the following:
    1. Make sure the lead being tested is not carrying a current (e.g. by removing the associated fuse) and that any load has been disengaged
    2.  
    3. Set the multi-meter to resistance measurement
    4.  
    5. Connect one test cable to a good ground and the other to the point to be tested
    6.  
    7. Carefully move the wiring harness and make sure the multi-meter shows infinite resistance (OL) the whole time
    8.  

  8.  
  9. Check components connectivity and functionality. Replace components as necessary.
  10.  

Removal & Installation
Motor & Regulator
Front Door
  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Remove the door trim.
    1. Remove the tailgate opening button.

      Click image to see an enlarged view

      Fig. Removing the tailgate opening button (1) , the cover on the door handle mounting (2) and the cover on the door mirror (3)

    2.  
    3. Undo the cover on the door handle mounting and remove the door handle.
    4.  
    5. Remove the cover on the door mirror.
    6.  
    7. Remove the door pull cover.
    8.  
    9. Undo the screw securing the door trim.
    10.  
    11. Pull off the door trim (fastened with clips) and lift it off the lock button.

      Click image to see an enlarged view

      Fig. Door trim (5) fastener (5) locations

    12.  

  4.  
  5. Remove the plastic water barrier.
  6.  
  7. Lower the window lift approximately 4 inches (10 cm) until the glass mounting is visible in the upper door holes.
  8.  
  9. Fasten the glass in the frame with 2 strips of tape.
  10.  
  11. Detach the scissor-lift stay from the window mounting by removing the clips and then pressing the stay away from the sliding rollers with a large flat chisel. Press the top edge between the stay and the rail.
    NOTE
    Press close to the edge to avoid deforming the rail.



    Click image to see an enlarged view

    Fig. Removing the scissor-lift stay from the window mounting

  12.  
  13. Drill out the blind rivet heads and knock them out of the door.
  14.  
  15. Run the window lift motor so that the scissor-lift takes up as little space as possible.
  16.  
  17. Unplug the connector for the window lift motor.
  18.  
  19. Remove the scissor-lift guide channel, fastened with 2 nuts.
  20.  
  21. Lift out the window lift assembly.
    NOTE
    If the window lift motor is not functioning, tape the window glass in the frame, drill out the rivets and then.

  22.  
  23. Remove the 3 retainer screws that secures the motor to the window lift.
    NOTE
    If one of the retainer screws should be hidden by the scissor-lift gear wheel and the motor is not functioning, it is possible to turn the gear wheel with the motor's rotor.

  24.  
  25. Do not dismantle the motor until you are absolutely certain that is not functioning.
  26.  
  27. First dismantle the stator, fastened with four screws, to access the rotor. Then turn the rotor while pressing on the gear wheel until the retainer screw is accessible.
  28.  
  29. Remove and replace the motor.

    Click image to see an enlarged view

    Fig. First dismantle the stator, fastened with four screws (12), to access the rotor and remove the motor (13)

  30.  

To install:

  1. Installation is the reverse of removal.
  2.  
  3. Adjust the position of the window glass as follows:
    1. Raise the window to approximately 2 inches (3 cm) from the closed position.
    2.  
    3. Press the window glass rearwards in the frame.
    4.  
    5. Check that the top edge of the window is parallel with the frame.
    6.  

  4.  
  5. Make sure the water drainage plastic is tight against the inner panel of the door and that it is not damaged.
  6.  

Rear Door
  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Remove the door trim.
    1. Remove the door-pull cover (fastened with clips).

      Click image to see an enlarged view

      Fig. Remove the switch (1) and the door-pull cover (2) that is fastened with clips

    2.  
    3. Remove the trim retaining screws in the door pull.
    4.  
    5. Remove the screws under the storage pocket.

      Click image to see an enlarged view

      Fig. Removing the retaining screws (3 a