Grand Cherokee 2WD Limited V8-4.7L (2002)
Power Window Motor: Testing and Inspection
Before you proceed with this diagnosis, confirm proper switch operation.
For complete circuit diagrams, refer to the appropriate wiring information. 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.
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
Step 3. 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 Step 4. 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.
