Power Window Motor: Testing and Inspection

This diagnosis is for the rear door power window switches. The front door power window switches are integral to the door modules. For diagnosis of the front door power window switches, see Door Module.

Before you proceed with this diagnosis, confirm proper switch operation. See the Door Module and/or Power Window Switch diagnosis.
1. Remove the door trim panel as described in Door Module (front door) or Power Window Switch (rear door).
2. Disconnect the power window motor wire harness connector. Apply 12 Volts. across the motor terminals to check its operation in one direction. Reverse the connections across the motor terminals to check the operation 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, repair the circuits from the motor to the door module or switch as required. If not OK, replace the faulty motor.
3. If the motor operates in both directions, check the operation of the window glass and lift mechanism through its complete up and down travel. There should be no binding or sticking of the window glass or lift mechanism through the entire travel range. If not OK, check the window glass, tracks, and regulator for sticking, binding, or improper adjustment.