2002 Pontiac Firebird Formula, AutomaticFACTORY OEM SERVICE PROCEDURE

Test C: Express Down Function 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 diagnostic system check before proceeding. See DOOR SYSTEMS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Using driver's power window switch, verify express down operation. If express down does not operate, go to next step. If express down operates, inspect for intermittent or poor connections. See TROUBLE SHOOTING  .
  3. Turn ignition switch to OFF position. Disconnect power window control module 5-pin harness connector. Power window control module is located mounted to center of dash mat, above floor tunnel. See Figure . Turn ignition switch to RUN position. Connect a test light between ground and power window control module harness connector terminal "C" (Brown wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  6 .
  4. Connect a test light between ground and power window control module harness connector terminal "A" (Dark Blue wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  7 .
  5. Inspect power window control module harness connector for poor connections. If poor connections are not found, go to step  8 . If poor connections are found, repair as necessary then go to step  9 .
  6. Repair open in Brown wire between power window control module and instrument panel fuse block. Instrument panel fuse block is located behind left side of instrument panel. See Figure . Go to step  9 .
  7. Repair open in Dark Blue wire between power window control module and driver's power window motor. Go to step  9 .
  8. Replace power window control module, then go to next step.
  9. Operate system to verify repair. If system is not operating properly, repeat test beginning at step  2 .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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