Test 1: All Windows Inoperative
- Turn ignition switch to RUN position. Using a test light connected to ground, backprobe master switch assembly connector terminal "H" (Brown wire). See Fig 1. If test light illuminates, go to next step. If test light does not illuminate, go to step 3.
- Using a test light, backprobe between master switch assembly connector terminals "H" (Brown wire) and "G" (Black wire). If test light illuminates, go to step 4. If test light does not illuminate, go to step 5.
- Check for poor connection at connector C200 terminal A8 (Brown wire) behind right side of instrument panel. See WIRING DIAGRAMS . If connection is okay, repair open in Brown wire between PWR WDO circuit breaker and splice S307. Go to step 6.
- Replace master switch assembly. See WINDOW SWITCH under REMOVAL & INSTALLATION. Go to step 6.
- Repair poor connection or open in Black wire between master switch assembly connector terminal "G" and ground. See WIRING DIAGRAMS . Go to step 6.
- Turn ignition switch to OFF position. Reconnect all disconnected components and connectors. Retest system.
Courtesy of GENERAL MOTORS CORP.