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Test A: All Windows Inoperative

  1. If door systems diagnostic system check has been performed, go to next step. If door systems diagnostic system check has not been performed, perform door systems diagnostic system check. See DOOR SYSTEMS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Operate power windows. If power windows do not operate properly, go to next step. If all power windows operate properly, problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - CARS article in ENGINE PERFORMANCE.
  3. Disconnect master power window switch 6-pin harness connector C2. Turn ignition switch to RUN position. Connect a test light between ground and master power window switch harness connector C2 terminal "C" (Brown wire). See Fig 1 . If test light illuminates, go to next step. If test light does not illuminate, go to step  5 .
  4. Connect test light between master power window switch harness connector C2 terminals "A" (Black wire) and "C" (Brown wire). If test light illuminates, go to step  6 . If test light does not illuminate, go to step  9 .
  5. Check for open or poor connection in Brown wire between right side instrument panel junction block and master power window switch. See WIRING DIAGRAMS  . If problem does not exist, go to step  7 . If problem exists, repair as necessary and go to step  10 .
  6. Check for poor connection or loose terminals at master power window switch. If problem does not exist, go to step  8 . If problem exists, repair as necessary and go to step  10 .
  7. Repair short to ground in Brown wire between right instrument panel wiring harness junction block harness connector C3 terminal A8 and master power window switch harness connector C2 terminal "C". See WIRING DIAGRAMS  . After repair, go to step  10 .
  8. Replace master power window switch. After repair, go to step  10 .
  9. Repair open in Black wire between master power window switch assembly harness connector C2 terminal "A" and ground. Ground point is located on left side of passenger compartment, behind rocker panel. See WIRING DIAGRAMS  . After repair, go to next step.
  10. Operate power window system to verify repair. If problem does not exist, system is okay. If problem still exists, go to step  2 .
Fig 1: Identifying Master Power Window Switch Harness Connector Terminals
G98H00429Courtesy of GENERAL MOTORS CORP.
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