Power Window System: Diagnosis Chevrolet Venture I

PRELIMINARY INSPECTION

Check condition of PWR WDO circuit breaker (30-amp) located in instrument panel fuse box. Check for mechanical failures or binding linkage. Check for broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Check for proper installation of aftermarket electronic equipment. If no problem is found, repair by symptom. See SYMPTOM INDEX table under SYMPTOM TESTS.

SYMPTOM 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 connectors and identify terminals, see WIRING DIAGRAMS .

SYMPTOM INDEX

TEST 1: ALL WINDOWS INOPERATIVE

1. Turn ignition switch to RUN position. Using a test light connected to ground, backprobe master switch assembly connector terminal "H" (Brown wire). (Scheme 1) If test light illuminates, go to next step. If test light does not illuminate, go to step 3.
2. Using a test light, backprobe between master switch assembly connector terminals "H" (Brown wire) and "G" (Black wire). If test light illuminates, go to step 4. If test light does not illuminate, go to step 5.
3. Check for poor connection at connector C200 terminal A8 (Brown wire) behind right side of instrument panel. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If connection is okay, repair open in Brown wire between PWR WDO circuit breaker and splice S307. Go to step 6.
4. Replace master switch assembly. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION. Go to step 6.
5. Repair poor connection or open in Black wire between master switch assembly connector terminal "G" and ground. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Go to step 6.
6. Turn ignition switch to OFF position. Reconnect all disconnected components and connectors. Retest system.

Scheme 1

TEST 2: LEFT WINDOW INOPERATIVE

1. Disconnect left window motor connector. Connect a test light between left front window motor harness connector terminals "A" (Dark Blue) and "B" (Brown wire). (Scheme 1) Turn ignition switch to RUN position. Move left front window switch on master switch assembly to UP and DOWN positions. If test light does not illuminate in both positions, go to step 3. If test light illuminates in both positions, go to next step.
2. Replace left front window motor. See «WINDOW MOTOR»(ref-2713-S32919271472000041200000) under REMOVAL & INSTALLATION.
3. Turn ignition switch to OFF position. Disconnect master switch assembly. Using DVOM, check for open or short to ground in Brown wire between master switch assembly connector terminal "A" and left front window motor connector terminal "B". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and retest system. If Brown wire is okay, go to next step.
4. Using DVOM, check for open or short to ground in Dark Blue wire between master switch assembly connector terminal "E" and left front window motor connector terminal "A". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and retest system. If Dark Blue wire circuit is okay, go to next step.
5. Replace master switch assembly. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION. Retest system.

TEST 3: RIGHT WINDOW INOPERATIVE

1. Turn ignition switch to OFF position. Disconnect right front window switch connector. Using a test light, backprobe between right front window switch connector terminals "D" (Tan wire) and "H" (Light Blue wire). (Scheme 1) Turn ignition switch to RUN position. Move left front 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 3.
2. Turn ignition switch to OFF position. Disconnect right front window motor connector. Using a DVOM, check for open or short to ground in Brown wire and Dark Blue wire between right front window switch and right front window motor. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If an open or short to ground is found, go to step 5. If Brown wire and Dark Blue wire are okay, go to step 4.
3. Using a test light, backprobe between master switch assembly connector terminals "B" (Light Blue wire) and "F" (Tan wire). Move left front window switch on master switch assembly to UP and DOWN positions. If test light illuminates in both positions, go to step 6. If test light does not illuminate in both positions, go to step 7.
4. Connect right front window switch connector. Turn ignition switch to RUN position. Using a test light, backprobe between right front window switch connector terminals "A" (Dark Blue wire) and "E" (Brown wire). Move right front window switch to UP and DOWN positions. If test light illuminates in both positions, go to step 8. If test light does not illuminate in both positions, go to step 9.
5. Repair open or short to ground in Brown wire or Dark Blue wire between right front window switch and right window motor. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and go to step 10.
6. Check for open in Light Blue wire between master switch assembly connector terminal "B" and right front window switch connector terminal "H". If Light Blue wire is okay, check for open in Tan wire between master switch assembly connector terminal "F" and right front window switch connector terminal "D". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and go to step 10.
7. Replace master switch assembly. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION. Go to step 10.
8. Replace right front window motor. See «WINDOW MOTOR»(ref-2713-S32919271472000041200000) under REMOVAL & INSTALLATION. Go to step 10.
9. Replace right front window switch. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION. Go to next step.
10. Turn ignition switch to OFF position. Connect any disconnected components or connectors. Retest system.

TEST 4: RIGHT WINDOW INOPERATIVE FROM RIGHT SWITCH

1. Turn ignition switch to RUN position. Using a test light connected to ground, backprobe right front window switch connector terminal "F" (Brown wire). (Scheme 1) If test light illuminates, go to next step. If test light does not illuminate, go to step 3.
2. Replace right front window switch. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION.
3. Repair open in Brown wire between right front window switch connector terminal "F" and PWR WDO circuit breaker in instrument panel fuse block. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Retest system.

TEST 5: RIGHT WINDOW INOPERATIVE FROM MASTER SWITCH

1. Disconnect master switch assembly. Disconnect right front window switch. Check for short to ground in Light Blue wire between master switch assembly connector terminal "B" and right front window switch connector terminal "H". (Scheme 1) See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and retest system. If Light Blue wire is okay, go to next step.
2. Check for short to ground in Tan wire between master switch assembly connector terminal "F" and right front window switch connector terminal "D". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Repair as necessary and retest system. If Tan wire is okay, go to next step.
3. Replace master switch assembly. See «WINDOW SWITCH»(ref-2713-S33686223442000041200000) under REMOVAL & INSTALLATION. Retest system.

TEST 6: BOTH REAR QUARTER WINDOWS INOPERATIVE

1. Turn ignition switch to RUN position. Using a test light connected to ground, backprobe interior light/multifunction switch connector C4 terminal "E" (Brown wire). (Scheme 2) If test light illuminates, go to next step. If test light does not illuminate, go to step 3.
2. Using a test light, backprobe between interior light/multifunction switch connector C4 terminals "E" (Brown wire) and "B" (Black wire). If test light illuminates, go to step 4. If test light does not illuminate, go to step 5.
3. Check PWR QTR VENT (10-amp) fuse located in instrument panel fuse block. See «COMPONENT LOCATIONS»(ref-2713-S26009939252000041200000). If fuse is open, go to step 6. If fuse is okay, go to step 7.
4. Using a test light, backprobe between interior light/multifunction switch connector C4 terminals "C" and "D" (Black wires). Press rear quarter window switch to OPEN and CLOSED positions. If test light illuminates in both positions, go to step 8. If test light does not illuminate in both positions, go to step 9.
5. Repair poor connection or open in Black wire between interior light/multifunction switch connector C4 terminal "B" and ground. See «COMPONENT LOCATIONS»(ref-2713-S26009939252000041200000) and «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Retest system.
6. Check for short to ground in Brown wire between interior light/multifunction switch connector C4 terminal "E" and PWR QTR VENT fuse terminal in instrument panel fuse block. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If short to ground exists, go to step 10. If short to ground does not exist, go to step 11.
7. Repair open in Brown wire between interior light/multifunction switch connector C4 terminal "E" and PWR QTR VENT fuse terminal in instrument panel fuse block. Retest system.
8. Check for open in Black wire between interior light/multifunction switch connector C4 terminal "D" and splice S423. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If Black wire is open, go to step 12. If Black wire is not open, go to step 13.
9. Replace interior light/multifunction switch. See «INTERIOR LIGHT/MULTIFUNCTION SWITCH»(ref-2713-S40699927052000041200000) under REMOVAL & INSTALLATION. Retest system.
10. Repair short to ground in Brown wire between interior light/multifunction switch connector C4 terminal "E" and PWR QTR VENT fuse terminal in instrument panel fuse block. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Retest system.
11. Check for short to ground in Black wire between interior light/multifunction switch connector C4 terminal "D" and splice S423. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If Black wire is shorted to ground, go to step 14. If Black wire is not shorted to ground, go to step 15.
12. Repair open in Black wire between interior light/multifunction switch connector C4, terminal "D" and splice S423. Retest system.
13. Repair open in wire between interior light/multifunction switch connector C4, terminal "C" and splice S427. See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). Retest system.
14. Repair short to ground in Black wire between interior light/multifunction switch connector C4 terminal "D" and splice S423. Retest system.
15. Check for short to ground between interior light/multifunction switch connector C4 terminal "C" (Black wire) and rear quarter window motor connector terminal "B" (Brown wire). See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000). If short to ground exists, go to next step. If short to ground does not exist, go to step 9.
16. Repair short to ground between interior light/multifunction switch connector C4 terminal "C" (Black wire) and rear quarter window motor connector terminal "B" (Brown wire). Retest system.

Scheme 2

TEST 7: ONE REAR QUARTER WINDOW INOPERATIVE

1. Turn ignition switch to RUN position. Using a test light, backprobe between inoperative quarter window actuator connector terminals "A" (Black wire) and "B" (Brown wire). Press rear quarter window switch to OPEN and CLOSED positions. If test light illuminates in both positions, go to next step. If test light does not illuminate in both positions, go to step 3 .
2. Replace inoperative rear quarter window actuator. See «REAR QUARTER WINDOW ACTUATOR»(ref-2713-S37549373762000041200000) under REMOVAL & INSTALLATION. Retest system.
3. Using a test light connected to ground, backprobe rear quarter window actuator connector terminal "B" (Brown wire). Press rear quarter window switch to OPEN position. If test light illuminates, go to next step. If test light does not illuminate, go to step 5 .
4. Repair open in Black wire between splice S423 and inoperative rear quarter window actuator connector terminal "A". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000) . Retest system.
5. Repair open in Brown wire between splice S427 and inoperative rear quarter window actuator connector terminal "B". See «WIRING DIAGRAMS»(ref-2713-S02511761672000041200000) . Retest system.