Test A: All Power Windows Inoperative
- If description and operation has been reviewed, go to next step. If description and operation has not been reviewed, go to DESCRIPTION & OPERATION
.
- Verify all power windows are inoperative. If all power windows are inoperative, go to next step. If either power window operates, diagnose by symptom. See SYMPTOM INDEX
table. If all power windows operate normally, diagnose intermittent problem. See DIAGNOSING INTERMITTENTS in BODY CONTROL MODULES - MONTANA, SILHOUETTE & VENTURE article.
- Disconnect power window master switch 8-pin harness connector. Turn ignition switch to RUN position. Using test light connected to ground, probe power window master switch harness connector terminal "H" (Yellow wire). See Fig 1
. If test light illuminates, go to next step. If test light does not illuminate, go to step 5
.
- Connect test light between power window master switch harness connector terminals "G" (Black wire) and "H" (Yellow wire). If test light illuminates, go to step 6
. If test light does not illuminate, go to step 7
.
- Check for open or short to ground in Yellow wire between power window master switch and instrument panel fuse block. See WIRING DIAGRAMS
. If problem does not exist, diagnose retained accessory power system. See BODY CONTROL MODULES - MONTANA, SILHOUETTE & VENTURE article. If problem exists, repair as necessary. After repair, go to step 9
.
- Check power window master switch harness connector for poor connections or loose terminals. If problem does not exist, go to step 8
. If problem exists, repair as necessary. After repair, go to step 9
.
- Repair open in Black wire between power window master switch and ground. Ground point is located at base of "B" pillar. After repair, go to step 9
.
- Replace power window master switch. After repair, go to next step.
- Operate system to verify repair. If problem does not exist, system is okay. If problem exists, go to step 2
.
Courtesy of GENERAL MOTORS CORP.