Power Window Motor Diagnosis

Suggested process to diagnose inoperative power windows:

1. Connect the diagnostic scan tool to check for Diagnostic Trouble Codes (DTCs) and to validate operation of the power window system. Resolve any DTCs and retest the power window operation.
2. Check for damaged fuses and replace as needed.
3. Confirm the power to the motor and the motor ground integrity.
4. Using the diagnostic scan tool, confirm that the window switch actuation is recognized.
5. If the power window motor is receiving proper current and proper ground and does not operate, proceed with motor test.
   1. Remove front door trim panel to gain access to power window motor wire connector.
   2. Disconnect the power window motor wire harness connector from door harness.
   3. Using two jumper wires, connect one to a battery (+) source and the other to a good ground (-).
   4. Connect the Negative (-) jumper probe to one of the motor connector terminals.
   5. Momentarily touch the Positive (+) jumper probe to the other motor connector terminal.

      When positive probe is connected, the motor should rotate in one direction to either move window up or down. If window is all the way up or down the motor will grunt and the inner door panel will flex when actuated in that one direction.

   6. Reverse jumper probes at the motor connector terminals and window should now move in opposite direction. If window does not move or grunt, replace the motor. If the window moves completely up or down, reverse the jumper probes and cycle window to the opposite position to verify full operation. If motor grunts and does not move, verify that regulator is not binding.