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Test 2: Left Front Window Inoperative

  1. Disconnect express down module 4-pin connector. Turn ignition switch to RUN position. Connect test light between ground and express down module connector terminal "A" (Brown wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown wire between PWR WDO/SR (30-amp) circuit breaker and express down module. See WIRING DIAGRAMS  .
  2. Connect test light between express down module connector terminals "B" (Gray wire) and "C" (Dark Blue wire). Press left front window switch on master switch assembly to UP and DOWN positions. If test light illuminates in both switch positions, go to next step. If test light does not illuminate in both switch positions, check Gray wire and Dark Blue wire between express down module and master switch assembly. See WIRING DIAGRAMS  . If circuits and connector contact are okay, replace master switch assembly. See WINDOW SWITCH  under REMOVAL & INSTALLATION.
  3. Disconnect left front window motor connector. Connect a test light between ground and left front window motor connector terminal "A" (Dark Blue wire). Press left front window switch on master switch assembly to UP position. If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Blue wire between left front window motor connector terminal "A" and splice S500. See WIRING DIAGRAMS  .
  4. Connect left front window motor connector. Connect a fused jumper between express down module connector terminals "A" (Brown wire) and "D" (Brown wire). If left front window motor operates, go to next step. If left front window motor does not operate, check for open in Brown wire between express down module connector terminal "D" and left front window motor connector terminal "B". See WIRING DIAGRAMS  . If Brown wire and connector contact are okay, replace left front window motor. See WINDOW MOTOR  under REMOVAL & INSTALLATION.
  5. Connect a fused jumper between ground and express down module harness connector terminal "D" (Brown wire). Press left front window switch on master switch assembly to UP position. If left front window motor does not operate, check for proper terminal contact at left front window motor. If terminal contact is okay, replace left front window motor. See WINDOW MOTOR  under REMOVAL & INSTALLATION. If left front window motor operates, check express down module connector for poor terminal contact. If terminal contact is okay, replace express down module. See EXPRESS DOWN MODULE  under REMOVAL & INSTALLATION.
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