Diagnosis And Testing - Power Window Switch

Any diagnosis of the power window system should begin with the use of the DRB III® diagnostic tool. For information on the use of the DRB III®, refer to  BODY DIAGNOSTIC PROCEDURES  . 

The diagnosis found here applies only to the rear door power window switches. If the problem being diagnosed is an inoperative power window switch illumination lamp, but the power window switch operates as designed, replace the faulty rear door power window switch (verify the power lockout switch is not actuated)  .

For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS .

1. Disconnect and isolate the battery negative cable.
2. Remove the power window switch from the rear door trim panel (Refer to ELECTRICAL/POWER WINDOWS/POWER WINDOW SWITCH - REMOVAL) .
3. Check the rear door power window switch continuity as shown in the POWER WINDOW SWITCH TEST  table. See Fig 1. If okay, (Refer to ELECTRICAL/POWER WINDOWS - DIAGNOSIS AND TESTING) .

Fig 1: Identifying Rear Power Window Switch Terminals

Courtesy of DAIMLERCHRYSLER CORP.