Diagnosis And Testing - Window Motor

Before you proceed with this diagnosis, confirm proper switch operation. (Refer to POWER WINDOW SWITCH  and REMOVAL & INSTALLATION . ). For complete circuit diagrams, refer to the appropriate wiring article. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

1. Remove the trim panel from the door with the inoperative power window. For front doors, refer to TRIM PANEL . For rear doors, refer to TRIM PANEL .
2. Disconnect the door wire harness connector from the power window motor wire harness connector. Apply battery current to one cavity of the power window motor wire harness connector, and apply ground to the other cavity of the connector. The power window motor should operate in one direction. Remember, if the window is in the full up or full down position, the motor will not operate in that direction by design. If OK, go to next step. If not OK, replace the faulty power window motor.
3. Reverse the battery and ground connections to the two cavities of the power window motor wire harness connector. The power window motor should now operate in the other direction. Remember, if the window is in the full up or full down position, the motor will not operate in that direction by design. If OK, go to next step. If not OK, replace the faulty power window motor.
4. If the power window motor operates in both directions, check the operation of the window glass and regulator mechanism through its complete up and down travel. There should be no binding or sticking of the window glass or regulator mechanism through the entire travel range. If not OK, check for proper installation or damage of the window glass mounting and operating hardware. For front doors, refer to DOORS - FRONT article. For rear doors, refer to DOORS - REAR article.