Power Window System Buick Riviera VIII

Description

Power window system uses a permanent magnet motor to operate each window. Motor operation is controlled by a master switch assembly alone or in combination with individual window switches. Window is raised or lowered depending on polarity of current applied to window motor.

Some models use a control module to access an express mode of operation. When left front window switch is held in down position for .3 second, module activates relay to apply full battery voltage to window motor. This provides current to quickly and fully open window.

Operation

When ignition switch is in RUN position, power for window system is supplied to master switch assembly through fuse block circuit breaker. When any master switch is operated, power is applied through related window switch to motor, driving window motor in either direction to either raise or lower window. Each motor is protected by an internal circuit breaker which will reset after switch is released (voltage removed).

SYSTEM CHECK

1. Before beginning system check, turn ignition on. Ensure there is battery voltage from power window circuit breaker, located in fuse block. Ensure master switch ground circuit is complete.
2. With all windows closed, turn ignition switch to RUN position. Briefly (less than .3 second) press left front window switch down. Window should descend a small distance, then stop.
3. Press left front window switch down and release (more than .3 second). Window should descend completely (express mode).
4. Press left front window switch up. Window should raise as long as switch is held up, then stop when switch is released (no express). Repeat step 3). While window is moving down in express mode, press switch upward. Window should stop express decent.
5. Lower and raise other windows from master switch. All windows should operate quietly and smoothly through full range of travel.
6. Lower and raise each window from window switches. All windows should operate quietly and smoothly through full range of travel. Note any symptoms and proceed to appropriate test.

TESTING

Note. Left front window switch is referred to as master switch. For circuit identification, see WIRING DIAGRAMS .

WINDOWS DO NOT OPERATE

1. Disconnect master switch connector. Turn ignition switch to RUN position. Connect test light between ground and Brown wire terminal at master switch connector. If test light is on, go to next step. If test light is off, check for poor connection at master switch. If connection is okay, repair open or short to ground in Brown wire between power window 25-amp circuit breaker and master switch.
2. Connect test light between Brown wire and Black wire terminals (ground) of master switch connector. If test light is on, check for poor connection at master switch. If connection is okay, replace master switch. If test light is off, check for poor connection at ground connection. If connection is okay, repair open in Black wire between master switch and ground connection.

LEFT FRONT WINDOW DOES NOT OPERATE

1. Disconnect express down module connector, located at center of left front door. Turn ignition switch to RUN position. Connect test light between ground and Brown wire terminal (power) at express down module connector. If test light is on, go to next step. If test light is off, repair open in Brown wire between power window 25-amp circuit breaker and express down module.
2. Connect test light between Gray wire and Dark Blue wire terminals at express down module connector. If test light is off, go to next step. If test light is on, replace master switch (shorted left front window switch).
3. Press left front window switch at master switch to up and down positions. If test light is on, go to next step. If test light is off, repair open in Gray wire or Dark Blue wire between master switch and express down module. If wire is okay, replace master switch.
4. Disconnect left front window motor connector. Connect test light between ground and Dark Blue wire terminal at left front window motor connector. Press left front window switch at master switch to up position. If test light is on, go to next step. If test light is off, repair open in Dark Blue wire between left front window motor and express down module.
5. Reconnect left front window motor connector. Connect a fused jumper between Brown wire terminals (power and left front motor connection) at express down module connector. If left front window motor operates, go to next step. If left front window motor does not operate, repair open in Brown wire between express down module and left front window motor. If wire is okay, replace motor.
6. Connect a fused jumper between ground and Brown wire terminal (left front motor connection) at express down module. Press left front window switch at master switch to up position. If left front window motor operates, replace express down module. If left front window motor does not operate, replace motor.

RIGHT FRONT WINDOW IS INOPERATIVE AT INDIVIDUAL SWITCH

OPERATES AT MASTER SWITCH

Riviera

Disconnect right window switch connector. Turn ignition switch to RUN position. Connect test light between ground and Brown wire terminal at right window switch connector. If test light is on, replace right window switch. If test light is off, repair open in Brown wire between right window switch and power window 25-amp circuit breaker.

RIGHT FRONT WINDOW IS INOPERATIVE AT MASTER SWITCH

OPERATES AT INDIVIDUAL SWITCH

Disconnect master switch connector. Turn ignition switch to RUN position. Connect test light between ground and Brown wire terminal at master switch connector. If test light is on, replace master switch. If test light is off, repair open in Brown wire between master switch and power window 25-amp circuit breaker.

RIGHT FRONT, LEFT REAR OR RIGHT REAR WINDOW IS INOPERATIVE AT

INDIVIDUAL SWITCH, OPERATES AT MASTER SWITCH

Aurora

Disconnect master switch connector. Disconnect right rear window switch connector. Turn ignition switch to RUN position. Connect a fused jumper between Brown wire and Dark Blue wire terminals (window lock-out) at master switch connector. Connect test light between ground and Dark Blue wire terminal at right rear window switch connector. If test light is on, check for poor connection at master switch. If connection is okay, replace master switch. If test light is off, repair open in Dark Blue wire between master switch and inoperative window switch.

MASTER SWITCH, OPERATES AT INDIVIDUAL SWITCH

Disconnect master switch connector. Turn ignition switch to RUN position. Connect test light between ground and Brown wire terminal at master switch connector. If test light is on, check for poor connection at master switch. If connection is okay, replace master switch. If test light is off, repair open in Brown wire between master switch and power window 25-amp circuit breaker.

ONE WINDOW (EXCEPT LEFT FRONT) INOPERATIVE FROM MASTER &

INDIVIDUAL SWITCH, ALL OTHERS OPERATE

1. Disconnect inoperative window switch connector. Disconnect master switch connector. Turn ignition switch to RUN position. Connect one fused jumper between Brown wire terminal at master switch connector and Dark Blue wire terminal at inoperative window switch connector. Connect another fused jumper between ground and Brown wire terminal at inoperative window switch connector. Window should operate in one direction.
2. Reverse fused jumper connections at inoperative window switch connector. Window motor should operate in other direction. If window motor operates in both directions, go to next step. If window motor does not operate in both directions, repair open in Dark Blue wire or Brown wire at inoperative window motor. If wires are okay, replace window motor.
3. Reconnect master switch connector. Ensure inoperative window switch connector is disconnected. Connect test light between ground and Light Blue wire terminal at right front window switch connector, between ground and Dark Green wire terminal at left rear window switch connector, and between ground and Light Green wire terminal at right rear window switch connector. If test light is off at any specified terminals, go to next step. If test light is on at all specified terminals, replace master switch.
4. With test light connected to inoperative window switch connector terminal and ground as described in previous step, press inoperative window switch at master switch to up position. If test light is on, go to next step. If test light is off, repair open in appropriate wire to inoperative window switch. If wire(s) is okay, replace master switch.
5. Ensure inoperative window switch connector is disconnected. Connect test light to inoperative window switch between ground and Tan wire at right front window switch connector, or between ground and Purple wire terminal for rear window switch connectors. If test light if off, go to next step. If test light is on, replace master switch.
6. With test light connected to inoperative window switch connector terminal and ground as described in previous step, press inoperative window switch at master switch to down position. If test light is on, replace inoperative window switch. If test light is off, repair open in appropriate wire to inoperative window switch. If wire(s) are okay, replace master switch.

EXPRESS DOWN DOES NOT OPERATE

Disconnect express down module connector, located at center of left front door. Turn ignition switch to RUN position. Connect test light between ground and Dark Blue wire terminal at express down module connector. If test light is on, replace express down module. If test light is off, repair open in Dark Blue wire between express down module and master switch.

Removal

1. Raise window to full up position and secure in place. Remove door panel covering and insulator. Window may be disengaged from regulator and removed from vehicle. If motor is held to door and regulator with nuts and bolts, remove nuts and bolts as necessary.
2. If motor is held to door and regulator with rivets, punch out center of regulator-to-door rivets and drill out rivets using a 1/4" drill bit. Disconnect window from regulator.
3. Move regulator and motor assembly rearward to access motor-to-regulator rivets. Punch out center of motor-to-regulator rivets and drill out rivets using a 3/16" drill bit. On all models, disconnect electrical connector and remove motor from door.

Installation

To install, reverse removal procedure. On models attached with rivets, use Rivet Installer (J-34940) with 3/16" rivets for motor-to-regulator attachment and 1/4" rivets for regulator-to-door attachment.

Removal & Installation

Using a thin-blade screwdriver, pry between switch and door panel for spring clip (if equipped). Press down on clip to release switch and pry outward. Disconnect electrical connector and remove switch. To install, reverse removal procedure.

See also:
• WIRING DIAGRAMS