Power Window System Chevrolet Chevy Van G2500

DESCRIPTION & OPERATION

A permanent-magnet motor operates each power window. Each motor raises and lowers window when voltage is supplied. Motor direction depends on polarity of supply voltage. Switches control supply voltage polarity.

Master door lock/power window switch assembly controls all motors. Individual window switches are located on each door panel. Each motor is protected by a built-in circuit breaker. If a window switch is held too long with window obstructed or after window is fully up or down, circuit breaker opens circuit. Circuit breaker resets automatically as it cools.

TROUBLE SHOOTING

Before proceeding to TESTING , perform the following visual inspections

1. Check POWER WINDOW CIRCUIT BREAKER for damage. Replace if damaged.
2. Check power window voltage supply fuse. If fuse is blown, service and repair source of overload. Replace fuse.
3. Check for mechanical failures or binding linkage.
4. If express down feature does not work, but window moves down with each switch depression, replace left window switch.
5. 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. These circuits may be intermittent or resistive when loaded. Check by monitoring voltage drop with system under load.
6. Check for proper installation of aftermarket electronic equipment.

TESTING

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. See appropriate wiring diagram under WIRING DIAGRAMS to assist in testing procedures.

BOTH WINDOWS DO NOT OPERATE

1. Disconnect left window switch connector. Connect self-powered test light between ground and Black wire at left window switch connector. If test light illuminates, go to next step. If test light does not illuminate, repair open in Black wire between left window switch and ground connection.
2. Turn ignition switch to ACC position. Connect test light between ground and Yellow wire at left window switch connector. If test light does not illuminate, repair open in Yellow wire between left window switch and instrument panel fuse block. If test light illuminates, replace left window switch.

RIGHT WINDOW ONLY OPERATES FROM DRIVER'S SIDE WINDOW SWITCH

Disconnect right window switch connector. Turn ignition switch to ACC position. Connect test light between ground and Yellow wire at right window switch connector. If test light illuminates, replace right window switch. If test light does not illuminate, repair open in Yellow wire between right window switch and instrument panel fuse block.

LEFT WINDOW DOES NOT OPERATE

1. Disconnect left window switch connector. Disconnect left window motor connector. Connect self-powered test light between Dark Blue wire terminals at left window switch and left window motor connectors. If test light illuminates, go to next step. If test light does not illuminate, repair open in Dark Blue wire between left window switch and left window motor.
2. Connect self-powered test light between Brown wire terminals at left window switch and left window motor connectors. If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown wire between left window switch and left window motor.
3. Connect self-powered test light between Dark Blue and Black wire terminals at left window switch connector. If test light illuminates, go to next step. If test light does not illuminate, replace left window switch.
4. Connect self-powered test light between Brown and Black wire terminals at left window switch connector. If test light illuminates, go to next step. If test light does not illuminate, replace left window switch.
5. Connect self-powered test light between Yellow wire at left window switch connector and ground. Turn ignition switch to ACC position. If test light illuminates, go to next step. If test light does not illuminate, repair open in Yellow wire between left window switch and instrument panel fuse block.
6. Reconnect left window switch connector. Connect test light between ground and Dark Blue wire at left window motor connector. Press left window switch to UP position. If test light illuminates, go to next step. If test light does not illuminate, replace left window switch.
7. Connect test light between Brown wire at left window motor connector and ground. Press left window switch to DOWN position. If test light illuminates and no mechanical problems exist, replace left window motor. If test light does not illuminate, replace left window switch.

RIGHT WINDOW DOES NOT OPERATE FROM EITHER SWITCH

1. Disconnect left and right window switch connectors. Connect self-powered test light between Light Blue wire terminals at left and right window switch connectors. If test light illuminates, go to next step. If test light does not illuminate, repair open in Light Blue wire between left and right window switch.
2. Connect self-powered test light between Tan wire terminals at left and right window switch connectors. If test light illuminates, go to next step. If test light does not illuminate, repair open in Tan wire between left and right window switch.
3. Disconnect right window motor connector. Connect self-powered test light between Brown wire terminals at right window switch connector and motor connector. If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown wire between right window switch and right window motor.
4. Connect self-powered test light between Dark Blue wire terminals at right window switch connector and motor connector. If test light illuminates and no mechanical problems exist, replace right window motor. If test light does not illuminate, repair open in Dark Blue wire between right window switch and right window motor.

REMOVAL & INSTALLATION

Note. Window motor is attached to door module, which includes window regulator. Manufacturer only provides door module removal and installation procedure.

1. Disconnect negative battery cable. Remove door trim plate screws and trim plate. Remove window switch assembly. See «WINDOW SWITCH»(/chevrolet/chevy-van-g2500/1996-1998/remont/windows/#power-window-system) . Remove assist strap and armrest (if equipped). Remove door trim outer panel screws and door trim outer panel (if equipped) by pulling retainers away from door. Remove door trim inner panel screws and inner panel.
2. Remove speaker from door. Disconnect electrical connector from door speaker. Remove protective watershield by pulling it back from door assembly. Disconnect electrical connector from window motor. Remove nuts securing window motor to door module, and remove window motor from module. To install, reverse removal procedure. Lubricate motor drive dear and regulator sector teeth. Tighten all nuts and bolts to 97 INCH lbs. (11 N.m).

Disconnect negative battery cable. Remove door trim plate screws and trim plate. Disconnect electrical connector. Press in spring clip and remove power window switch. Remove power window switch from escutcheon by releasing tabs on switch. To install, reverse removal procedure.

See also:
• TESTING
• WIRING DIAGRAMS