Both Left & Right Windows Inoperative
- Turn ignition switch to RUN position. Backprobe left window switch with a test light from terminal "D" (Brown wire) to ground. If test light does not illuminate, check for an open circuit, short to ground, or poor connection at power window circuit breaker.
- If test light illuminates, backprobe left window switch with a test light from terminals "D" (Brown wire) to "B" (Black wire). If test light does not illuminate, ensure ground is clean and tight, or check for open in Black wire to left window switch. If test light illuminates, check for poor connection at left window switch. If connection is okay, replace left window switch.