Test 1: All Windows Inoperative
- If all windows are not inoperative from both master and door switches, test for intermittent and poor connections. If all windows are inoperative from master and door switches, go to next step.
- Turn ignition switch to RUN position. Using a test light connected to ground, backprobe master switch connector terminal No. 1 (Blue/White wire). If test light is on, repair open in Black wire between master switch connector terminal No. 9 and ground. See Fig 1
. If test light is off, repair open in Blue/White wire between junction block and power window master switch. See WIRING DIAGRAMS
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Courtesy of GENERAL MOTORS CORP.