DESCRIPTION
Reversible electric motors are located in each door. Each motor contains a circuit breaker and a self-locking gear drive. Individual switches are used for all passenger windows.
The driver's door has a single, 4-button switch or 2 double-button switches. All models are grounded through the master or console switch.
A junction block, located on left shroud, connects body power accessories to chassis wiring. Power window wiring harness plugs into the accessory block. A 30-amp circuit breaker mounted on fuse panel protects wiring for all power window systems.
ALL MODELS
Power windows are driven by reversible permanent magnet motors. Each motor is controlled by a switch with 2 sets of contacts that are normally closed to ground. With the power switch in the UP position, one set of contacts is closed, applying battery voltage to the power window motor. The remaining set of contacts remains closed, providing the ground to complete the circuit. With the power window switch in the DOWN position, the functions of the switches are revered and the motor runs in the opposite direction.
WINDOWS WILL NOT OPERATE
No power at circuit breaker or master switch. Ignition off. Bad ground connection at master switch. Switch defective.
INDIVIDUAL WINDOW DOES NOT OPERATE, ALL OTHERS OPERATE
Defective motor. Open circuit in door. Defective window switch or master switch.
INDIVIDUAL WINDOW DOES NOT OPERATE FROM WINDOWSWITCH, BUT OPERATES FROM MASTER SWITCH
Open circuit in power feed wire. Window switch defective.
CIRCUIT BREAKER
Check power feed to circuit breaker. Test power feed after circuit breaker. Repair as necessary.
MASTER CONTROL SWITCH
Check for power at Pink wire. All other wires should have continuity to ground when switch is in rest position. Check for clean and tight ground connection.
WINDOW CONTROL SWITCH
- Connect test light between Pink wire in switch connector and ground. If light does come on, check power feed wire. Locate wires to motor.
- Using jumper wire, connect Pink wire in switch connector between one motor wire and ground. Motor should operate. Reverse wires and retest. If motor operates properly, replace window control switch. If not, test motor.
WINDOW MOTOR
Connect power to one motor lead and ground other lead. Reverse connections and retest. If motor does not operate correctly in both directions, replace window motor.
REMOVAL & INSTALLATION
| CAUTION | On some models, motor can be removed separately from regulator only if window is intact and attached to regulator. If not, regulator MUST be removed first. Weight of door glass is needed to neutralize tension of counterbalance spring during motor removal. |
- Remove door trim pad and water deflector. On "B" and "D" bodies, place glass in full up position and tape in place.
- On "K" bodies, lower the glass until regulator sash attaching bolts are in line with inner panel access hole.
- Remove attaching bolts. On "K" bodies, remove front up stop through inner panel offset. Remove glass. Drill out motor attaching rivets and remove motor.
- To install, reverse removal procedure. Use 3/16" rivets or bolts to attach regulator to motor.
FRONT WINDOW MOTOR & REGULATOR
| WARNING | To prevent personal injury, before removing regulator and motor assembly, lock sector gear to back plate. Drill a 1/8" hole through sector gear and back plate, no closer than 1/2" from edge of sector gear. Install a metal screw (3/4" long) to lock gear, then remove motor. (Scheme 4) |
Scheme 4
Remove door trim and water deflector. Raise window and tape in raised position. Remove lower sash channel bolts. Punch out rivet center pins and drill out regulator rivets. Disconnect wiring, then remove regulator and motor. To install, reverse removal procedure. Secure regulator with "U" bolts and nuts.
REAR DOOR WINDOW REGULATOR & MOTOR
Tape glass in raised position. Remove lower sash bolts. Punch out rivet center pins and drill out rivets. Disconnect wiring and remove regulator and motor. To install, reverse removal procedure. Secure regulator with "U" bolts and nuts.
WIRING DIAGRAMS
See appropriate chassis wiring diagram in WIRING DIAGRAMS.