Power Windows - "r" & "v" Series GMC Pickup R1500

DESCRIPTION

Each power window is moved by a single permanent magnet motor. The direction in which motor turns depends on the polarity of the voltage applied. A master power window switch is located on driver's door. Each passenger window switch controls only the window at that passenger's position.

All power window motors have a self-resetting circuit breaker built into them. The circuit breaker allows the motor to be stalled without damage. No travel-limit switches are used.

PASSENGER'S WINDOW WILL NOT WORK

1. With ignition switch in "RUN" or "ACC" position, check for voltage at passenger's switch. If there is no voltage, find open between switch and fuse block. If okay, go to next step.
2. With voltage applied to Pink wire at the switch, move switch to the "UP" position. Dark Blue wire should also have voltage. If there is no voltage, replace switch. If okay, go to next step.
3. With power window switch in the "UP" position, check for voltage on Dark Blue wire at power window motor. If there is no voltage, find open between switch and motor.
4. If there is voltage on Dark Blue wire, connect a grounded jumper wire to Brown wire at the motor. If motor runs, find open in ground circuit. If motor does not run, replace power window motor.

PASSENGER'S WINDOW WILL NOT WORK WHEN USING PASSENGER'S SWITCH, WINDOW WORKS WITH MASTER SWITCH

With ignition switch in "RUN" or "ACC" position, check for voltage at Pink wire on passenger's switch. If there is no voltage, find open between switch and instrument panel harness connector. If voltage is present, replace switch.

PASSENGER'S WINDOW WILL NOT WORK WHEN USING MASTER SWITCH

1. With ignition in "RUN" or "ACC" position, check operation of driver's window. If driver's window works, master switch has voltage. Place master switch in "UP" position and check for voltage at Dark Blue wire.
2. If there is no voltage on Dark Blue wire, replace master switch. If voltage is present on Dark Blue wire, find open between master switch and passenger's switch.

DRIVER'S WINDOW WILL NOT WORK PASSENGER'S WINDOW WORKS

1. With ignition in "RUN" or "ACC" position, place master switch in "UP" position. Check for voltage at Dark Blue wire at master switch. If voltage is not present, replace master switch. If okay, go to next step.
2. With master switch in "UP" position, check for voltage on Dark Blue wire at power window motor. If there is no voltage, find open between switch and motor.
3. If there is voltage on Dark Blue wire, connect a grounded jumper wire to Brown wire at the motor. If motor runs, find open in ground circuit. If motor does not run, replace power window motor.

Removal & Installation ("C", "K" & "G" Series)

Disconnect battery negative cable. Remove door trim panel. Disconnect electrical lead from switch. Switch connector is secured with a retaining nut. Press in retaining tabs and remove power window switch. To install, reverse removal procedure.

POWER WINDOW MOTOR

Scheme 1

Removal ("C", "K" & "G" Series)

1. Raise window to full "UP" position and tape glass to door frame to prevent it from falling. Disconnect battery negative cable. Remove door lock knob, armrest, assist handle, and strap assembly (if equipped with these items). Remove door trim panel.
2. Remove remote control bolts and set control assembly aside (if equipped). Remove window regulator-to-door panel attaching bolts and nuts. Disconnect harness from window regulator.
3. Disengage window regulator from rollers, regulator rail, or sash channels. Collapse regulator and remove it through access hole in door. Drill a hole through sector gear and backplate. Do not drill closer than 1/2" to edge of sector gear or backplate.
4. Install a 3/4" long sheet metal screw into hole to lock sector gear. Sector gear must be locked to avoid personal injury. Remove motor-to-regulator attaching screws and remove motor.

Installation

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.