DESCRIPTION
Each power window is operated by a single permanent magnet motor. Direction of motor rotations depends on polarity of the voltage applied. All power window motors have a built-in self-resetting circuit breaker.
Lumina APV, Silhouette and Trans Sport models are equipped with an "express down" feature. Pressing the left side window switch once will move driver's window all the way down. All solid state circuitry for this feature is contained within the left side switch.
On Blazer, Jimmy and Suburban, the tailgate window is operated by an internal switch, or a key. When tailgate is open, operation of the window either by switch or key is prevented by a cut-out switch. Circuit is protected by a 30-amp circuit breaker located at fuse block.
PASSENGER SIDE WINDOW DOES NOT WORK
- Ensure wiper fuse is good. With ignition switch in RUN or ACC position, check for voltage at passenger side switch. If there is no voltage, check for open between switch and fuse block. If okay, go to next step.
- With voltage applied to Pink wire at the switch, move switch to the UP position. Ensure voltage is present at Dark Blue wire. If voltage is not present, replace switch. If okay, go to next step.
- With power window switch in the UP position, check Dark Blue wire at power window motor for voltage. If voltage is not present, check for open between switch and motor.
- If voltage is present, connect a grounded jumper wire to Brown wire at the motor. If motor runs, check for open in ground circuit. If motor does not run, replace power window motor.
PASSENGER SIDE WINDOW ONLY WORKS WITH MASTER SWITCH
With ignition switch in RUN or ACC position, check for voltage at Pink wire on passenger side switch. If voltage is present, check open between switch and instrument panel harness connector. If voltage is present, replace passenger side switch.
PASSENGER SIDE WINDOW DOES NOT OPERATE WITH MASTER SWITCH
- With ignition in RUN or ACC position, check operation of driver's window. If driver's window works, voltage exists in master switch. Place master switch in UP position and check for voltage at Dark Blue wire.
- If voltage does not exist, replace master switch. If voltage exist, check for open between master switch and passenger side switch.
DRIVER'S WINDOW DOES NOT WORK PASSENGER SIDE WINDOW WORKS
- With ignition in RUN or ACC position, place master switch in UP position. Check Dark Blue wire at master switch for voltage. If voltage is not present, replace master switch. If voltage exists, go to next step.
- With master switch in UP position, check Dark Blue wire at power window motor for voltage. If voltage does not exists, check for open between switch and motor.
- If voltage exists, connect a grounded jumper wire to Brown wire at the motor. If motor runs, check for open in ground circuit. If motor does not run, replace power window motor.
Removal (All Models)
- Raise window to fully upward. Tape glass to door frame to prevent it from falling. Disconnect battery negative cable. Remove trim panel pull strap (if equipped). Remove armrest, trim panel, armrest bracket and water deflector.
- Disconnect wiring harness from power window motor. Drill out motor attaching rivets using a 3/16" drill bit. Remove motor. Push regulator forward, then slide it rearward to remove regulator arms from sash and rail. (Scheme 1) WARNING: Window regulator lift arm is under tension from counterbalance spring. Sector gear must be locked to avoid personal injury.
- Fold regulator arms and remove through access hole in door. Drill hole through sector gear and backplate. (Scheme 2)for sector gear and backplate locations. DO NOT drill hole closer than 1/2" to edge of sector gear or backplate.
- Install a 3/4" long sheet metal screw into hole to lock sector gear. Sector gear must be locked to avoid personal injury. Drill out motor attaching rivets using a 3/16" drill bit. Remove motor.
Installation
Fasten motor regulator with 3/16" rivets using Riveter (J-29022). Lubricate motor drive gear and regulator sector teeth. Ensure that motor pinion gear teeth mesh properly with sector gear. Remove screw locking sector gear. To complete installation, reverse removal procedure.
Scheme 1
Removal & Installation
Disconnect battery negative cable. Remove door pillar molding. Remove trim panel pull strap (if equipped). Remove window regulator handle and armrest. Remove door trim panel. Remove inner handle housing screws and housing. Disconnect electrical lead from window switch. Remove retaining nut from window switch connector (if equipped). Press in retaining tabs and remove power window switch. To install, reverse removal procedure.
- Remove tailgate trim panel (if equipped). Remove cover. Disconnect control rod from center handle. Remove center handle from tailgate. Disconnect right and left latch rods from control assembly. Remove control assembly from tailgate.
- Lower window and remove outer glass seal by prying clips away from tailgate. Raise or lower window as necessary to gain access to sash channel bolts. Remove sash together with glass from tailgate. Disconnect electrical lead from motor. Disconnect drive cable and wiring harness from motor. WARNING: Window regulator lift arm is under tension from counterbalance spring. Sector gear must be locked to avoid personal injury.
- Remove regulator assembly from tailgate. Drill a 1/8" hole through sector gear and backplate. (Scheme 2)for sector gear and backplate locations. Install a 3/4" long sheet metal screw into hole to lock sector gear. Remove motor-to-regulator attaching screws and remove motor. To install, reverse removal procedure.
Scheme 2
Remove tailgate trim panel (if equipped). Remove cover. Disconnect right latch rod from control assembly. Remove latch together with cut-out switch from tailgate. (Scheme 3) Disconnect wiring harness and remove cut-out switch from latch. To install, reverse removal procedure.
Scheme 3
WIRING DIAGRAMS
See appropriate chassis wiring diagram in the WIRING DIAGRAMS section.