Power Window System: Other GMC Envoy I

SYSTEM TESTS

Note. Before any testing is attempted, battery should be fully charged and all connections and pins cleaned and tightened to ensure proper continuity and ground.

Note. To prevent damage to terminals, Connector Test Adaptor Kit (J-35616-A) must be used whenever a diagnostic procedure requires checking or probing a terminal. To locate and identify terminals, see WIRING DIAGRAMS .

Windows Do Not Operate

1. Turn ignition switch to RUN position. Disconnect left door lock and side window switch 11-pin connector C1. Connect test light between ground and left door lock and side window switch connector C1, terminal "L" (Dark Green wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Green wire between left door lock and side window switch and fuse block.
2. Connect test light between left side door and side window switch connector C1, terminal "L" (Dark Green wire) and left door lock and side window switch 8-pin connector C2, terminal "C" (Black wire). If test light illuminates, check left door lock and side window switch for poor terminal contact. If connection is okay, replace left door lock and side window switch. If test light does not illuminate, repair open in Black wire between left door lock and side window switch and ground.

Left Window Inoperative/Right Window Operates Okay

1. Turn ignition switch to RUN position. Connect test light between left door lock and side window switch 8-pin connector C2, terminals "A" (Dark Blue wire) and "E" (Brown wire). Observe test light and operate switch between UP and DOWN positions. If test light illuminates in both positions, go to next step. If test light does not illuminate in both positions, check left door lock and side window switch for poor terminal contact. If connection is okay, replace left door lock and side window switch.
2. Connect test light between left window regulator motor connector terminals "B" (Dark Blue wire) and "A" (Brown wire). Observe test light and operate switch between UP and DOWN positions. If test light illuminates in both positions, check left window regulator motor connector for poor terminal contact. If connection is okay, replace left window regulator motor. If test light does not illuminate in both positions, repair open in Dark Blue or Brown wire between left door lock and side window switch and left front window regulator motor.

Right Window Inoperative From Individual Window

Switch/Operates Okay From Left Window Switch

Turn ignition switch to RUN position. Connect test light between ground and right door lock and side window switch 11-pin connector C1, terminal "F" (Dark Green wire). If test light illuminates, replace right door lock and side window switch. If test light does not illuminate, repair open in Dark Green wire between right door lock and side window switch and body bussed electrical center (BBEC).

Right Window Inoperative From Both Left & Right Switch/Left Window Operates Okay

1. Turn ignition switch to RUN position. Connect test light between right window regulator motor connector terminals "A" (Brown wire) and "B" (Dark Blue wire). Operate window switch between 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 right window regulator motor for poor terminal contact. If connection is okay, replace right window regulator motor.
2. Connect test light between right door lock and side window switch 11-pin connector C1, terminals "J" (Light Blue wire) and "L" (Tan wire). Operate right window switch (at left window switch) between UP and DOWN positions. If test light illuminates in both directions, go to next step. If test light does not illuminate in both directions, go to step 4).
3. Connect test light between right door lock and side window switch connector C1, terminals "G" (Dark Blue wire) and "K" (Brown wire). Operate right window switch between UP and DOWN positions. If test light illuminates in both positions, repair open in Dark Blue or Brown wire between right door lock and side window switch and right window regulator motor. If test light does not illuminate in both positions, check right door lock and side window switch for poor terminal contact. If connection is okay, replace right door lock and side window switch.
4. Connect test light between left window switch 8-pin connector C2, terminals "B" (Light Blue wire) and "D" (Tan wire). Operate switch for inoperative window at left window switch. If test light illuminates in both positions, repair open in Light Blue or Tan wires between left window switch and right door lock and side window switch. If test light does not illuminate in both positions, replace left door lock and side window switch.

All Windows Do Not Operate

1. Turn ignition switch to RUN position. Connect test light between ground and left front door lock and side window switch 11-pin connector C1, terminal "L" (Dark Green wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Green wire between left front door lock and side window switch and Body Bussed Electrical Center (BBEC).
2. Connect test light between left front window switch connector C1, terminal "L" (Dark Green wire) and left door lock and side window switch 8-pin connector C2, terminal "C" (Black wire). If test light illuminates, check left front door lock and side window switch connectors C1 and C2 for poor terminal contact. If connections are okay, replace left front door lock and side window switch. If test light does not illuminate, repair open in Black wire between left front door lock and side window switch and ground.

Left Front Window Inoperative/All Others Okay

1. Turn ignition switch to RUN position. Connect test light between left front door lock and side window switch 8-pin connector C2, terminals "A" (Dark Blue wire) and "E" (Brown wire). Operate switch between UP and DOWN positions. If test light illuminates in both directions, go to next step. If test light does not illuminate in both directions, check left front door lock and side window motor for poor terminal contact. If connection is okay, replace left front door lock and side window switch.
2. Connect test light between left front window regulator motor connector terminals "B" (Dark Blue wire) and "A" (Brown wire). Observe test light and operate switch between UP and DOWN positions. If test light illuminates in both positions, check left front window regulator motor connector for poor terminal contact. If connection is okay, replace left front window regulator motor. If test light does not illuminate in both positions, repair open in Dark Blue or Brown wire between left front door lock and side window switch and left front window regulator motor.

Right Front, Left Rear, Or Right Rear Window Inoperative From Individual Window Switch, But Operates Okay From Left Front Right Front, Left Rear, Or Right Rear Window Inoperative From Individual Window Switch, But Operates Okay From Left Front

1. Turn ignition switch to RUN position. Place window lock-out switch in NORMAL position. Connect test light between inoperative window switch connector Dark Blue wire (left rear and right rear), or Dark Green wire (right front window switch) and ground. If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Blue wire between side window lockout switch and inoperative window switch (left or right rear) or Dark Green wire between side window lockout switch and right front door lock and side window switch as necessary.
2. Connect test light between inoperative window switch connector Dark Blue and Brown wires. Operate window between UP and DOWN positions. If test light illuminates in both positions, go to next step. If test light does not illuminate in both positions, check inoperative window switch for poor terminal contact. If okay, replace inoperative window switch.
3. Connect test light between inoperative window motor connector Dark Blue and Brown wires. Operate window between UP and DOWN positions. If test light illuminates in both positions, check inoperative window motor for poor connection. If connection is okay, replace inoperative window motor. If test light does not illuminate in both positions, repair open in Dark Blue or Brown wire between inoperative window switch and window regulator motor.

One Window (Other Than Left Front) Is Inoperative From Left Front Window Switch & Individual Window Switch/All Other Windows Operate Okay

1. Turn ignition switch to RUN position. Connect test light between inoperative window motor connector terminals "A" (Brown wire) and "B" (Dark Blue wire). Operate window switch between 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 window regulator motor for poor connection. If connection is okay, replace window regulator motor.
2. Connect test light between inoperative rear window switch connector terminals "A" (Dark Green or Light Green wire) and "D" (Purple wire), or between right front window switch connector terminals "J" (Light Blue wire) and "L" (Tan wire). Operate inoperative window switch (at left front switch) between 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. Connect test light between right front inoperative window switch 11-pin connector C1, terminals "G" (Dark Blue wire) and "K" (Brown wire), or between rear inoperative window switch connector terminals "F" (Brown wire) and "C" (Dark Blue wire). Operate inoperative window switch between UP and DOWN positions. If test light illuminates in both positions, repair open in Dark Blue or Brown wire between inoperative window switch and window motor. If test light does not illuminate in both positions, check inoperative window switch for poor connection. If connection is okay, replace inoperative window switch.
4. Connect test light between left front door lock and side window switch connectors. For right front, connect test light between terminals "B" (Light Blue wire) and "D" (Tan wire) at 8-pin connector C2. For left rear, connect test light between connector C2, terminal "G" (Dark Green wire) and 11-pin connector C1, terminal "K" (Purple wire). For right rear, connect test light between connector C2, terminal "H" (Light Green wire) and connector C1, terminal "H" (Purple wire). If test light illuminates in all positions, repair poor connection or open in appropriate wiring. If test light does not illuminate in all positions, replace left front door lock and side window switch.

Lock-Out Function Does Not Work But Windows Operate Okay

Turn ignition switch to RUN position. Put window lock-out switch in LOCK position. Using a test light, backprobe between lock-out switch connector terminal "B" (Dark Blue wire) and ground. If test light illuminates, replace lock-out switch. If test light does not illuminate, repair short to voltage in Dark Blue wire.