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Home >> GMC >> 1999 >> Envoy >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> Symptom Tests >> Blazer, BRAVADA, Envoy & Jimmy (4-Door) >> Left Rear Or Right Rear Window Inoperative

Left Rear Or Right Rear Window Inoperative

  1. Turn ignition switch to RUN position. Using a test light, backprobe between inoperative rear window motor connector terminals "A" (Brown wire) and "B" (Dark Blue wire). Operate inoperative rear window switch to UP and DOWN positions. If test light does not illuminate in both positions, go to next step. If test light illuminates in both positions, check inoperative rear window regulator motor for poor connection. If connection is okay, replace inoperative rear window regulator motor. See WINDOW REGULATOR MOTOR  under REMOVAL & INSTALLATION.
  2. Using a test light, backprobe between inoperative rear window switch connector terminals "A" (Dark Green or Light Green wire) and "D" (Purple wire). See Figure . Operate inoperative window switch on master switch assembly to UP and DOWN positions. If test light illuminates in both positions, go to next step. If test light does not illuminate in both positions, go to step  4 .
  3. Using a test light, backprobe between inoperative rear window switch connector terminals "F" (Brown wire) and "C" (Dark Blue wire). See Figure . Operate inoperative rear window switch to UP and DOWN positions. If test light illuminates in both positions, repair open in Dark Blue wire or Brown wire between inoperative rear window switch and window motor. See WIRING DIAGRAMS  . If test light does not illuminate in both positions, check inoperative rear window switch for poor connection. If connection is okay, replace inoperative rear window switch. See WINDOW SWITCH  under REMOVAL & INSTALLATION.
  4. For left rear window, connect test light (backprobe) between master switch assembly connector C2 terminal "G" (Dark Green wire) and master switch assembly connector C1 terminal "K" (Purple wire). For right rear window, connect test light (backprobe) between master switch assembly connector C2 terminal "H" (Light Green wire) and master switch assembly connector C1 terminal "H" (Purple wire). See Figure and Figure . Operate inoperative rear window switch on master switch assembly to UP and DOWN positions. If test light illuminates in both positions, go to next step. If test light does not illuminate in both positions, replace master switch assembly. See WINDOW SWITCH  under REMOVAL & INSTALLATION.
  5. For left rear window, repair poor connection or open in Dark Green wire or Purple wire between master switch assembly and left rear window switch. For right rear window, repair poor connection or open in Light Green wire or Purple wire between master switch assembly and right rear window switch. See WIRING DIAGRAMS  .