Windows: Description and Operation

System Description
The operation of the power windows is controlled by the main switch in the master switch panel. When the main switch is in its OFF position, only the driver's power window can be opened or closed. With the main switch in its ON position, all the windows can be opened or closed by the master switches. The passenger's window can be controlled separately by the switch on the passenger's door.

The driver's window switch has an auto-down feature, which can be used to lower the drivers window partially or completely without holding the button down.

The power windows are driven by reversible motors. Each motor is protected by a built-in circuit breaker. If the window switch is held on too long (with the window obstructed, or after the window is fully up or down) the circuit breaker opens the circuit. The circuit breaker resets automatically as it cools.

Driver's Window
With the ignition switch in ON (II) or START (III) voltage is provided to the power window relay through Fuse 14, causing the contacts of the power window relay to close and provide voltage to the power window control unit.

The driver's window switch is supplied voltage at all times through fuse 15. When you move the driver's window switch to its UP position, voltage is applied to the power window control unit through the RED/BLU wire. The power window control unit then applies voltage to the driver's power window motor through the BLU/RED wire, and the driver's window rises.

With the drivers window switch in its DOWN position, voltage is supplied through the BLK/YEL wire to the power window control unit. The control unit then applies voltage to the driver's power window motor through the BLU/WHT wire, reversing the direction of current flow in the motor and lowering the window.

Automatic Down (Driver's Window)
With the ignition switch in ON (II) or START (III), voltage is applied to the coil of the power window relay. The contacts of the relay close, applying voltage to the power window control unit. When you move the driver's window switch to the AUTO DOWN position, voltage is applied through the GRN/BLU wire to the power window control unit. The control unit then applies voltage to the driver's window motor through the BLU/WHT wire, lowering the window. The control unit receives pulses from the pulser in the driver's window motor. When the window is all the way down, the motor stops, and the pulses are no longer generated by the pulser. This is sensed by the control unit at the pulser input, and it stops applying voltage to the driver's window motor.

The auto-down feature can be used to lower the driver's window fully or partially. To open the window fully, push the driver's window switch firmly and release it. The window will go all the way down. To stop the window part of the way down, push the window switch up then immediately release it.

To partially open the window, push the auto-down switch lightly and hold it. The window will stop when you release the switch.

Passenger Window
With the ignition switch in ON (II) or START (III) voltage is applied to the coil of the power window relay through fuse 14. The contacts of the power window relay close and voltage is applied to the power window control unit.

Battery voltage is supplied to the master switches through fuse 15. With the main switch ON, the passenger's window can be controlled by either the switch on the passenger's door or the passenger's window switch on the master panel.

When you push either passenger's window switch to the UP position, voltage is supplied to the power window control module through the ORN/WHT wire. The control unit then supplies voltage to the passenger's window motor through the BLU/YEL wire, and the motor drives the window up.

When you push the switch to the DOWN position, the control unit supplies voltage through the BLU/GRN wire to the passenger's window motor, and the window moves down as long as you hold the switch in the DOWN position.

Rear Window
With the Ignition switch in ON (II) or START (III), voltage is applied to the coil of the power window relay through fuse 14. The contacts of the power window relay close and voltage is applied to the power window control unit. Battery voltage is supplied to the rear window switch through fuse 15 when the main switch is in its ON position.

When you push the rear window switch to the UP position, battery voltage is applied through the RED/YEL wire to the power window control unit. The control unit in turn applies voltage to the rear window motor through the RED/BLU wire. The window then moves up as long as you hold the switch in the UP position.

When you push the rear window switch to the DOWN position, voltage is applied through the RED/BLK wire to the power window control unit. The control unit, in turn applies voltage through the RED/YEL wire to the rear window motor. This reverses the direction of the motor's operation and the window moves down as long as you hold the switch in the DOWN position.