Windows: Description and Operation

CIRCUIT OPERATION
With the Ignition Switch in "ON" or "START," voltage is applied through the GAUGE Fuse, Audio Alarm Module and Junction Block 3 to the coil of the Accessory Power Relay. Voltage is applied at all times through the Accessory Fusible Link to the switching portion of the Accessory Power Relay. The Accessory Power Relay is permanently grounded through Junction Connector 1 to G200. When the coil of the Accessory Power Relay is energized, the relay contacts close and voltage is applied to the LH Front Power Window/Door Lock Switch, RH Front Power Window Switch, LH Rear Power Window Switch and RH Rear Power Window Switch. The LH Front Power Window/Door Lock Switch is permanently grounded through Junction Connector 1 to G200.

When the LH Front Window Switch is depressed, the DOWN/AUTO DOWN contacts close, thus allowing voltage to be applied to the LH Front Power Window Motor. The LH Front Power Window Motor is grounded through the normally grounded UP contacts of the LH Front Power Window/Door Lock Switch to G200. With both power and ground supplied to the motor, it begins to turn and open the window. The LH Front Power Window Motor will stop once the window is completely open, via an Electronic Circuit Breaker (ECB) within the motor, or whenever the LH Front Window Switch is released. By releasing the switch, the DOWN/AUTO DOWN contacts return to their normally grounded position.

Closing the LH Front Window is accomplished by pulling up on the LH Front Window Switch. By pulling up on the switch, the UP contacts close, thus allowing voltage to be applied to the other side of the LH Front Power Window Motor. In this case, the LH Front Power Window Motor grounds through the normally grounded DOWN/AUTO DOWN contacts of the LH Front Power Window/Door Lock Switch to G200. With power and ground supplied to the motor, it begins to turn and closes the window. The LH Front Power Window Motor will stop once the window is completely closed, via the ECB, or whenever the LH Window Switch is released. Once the switch is released, the UP contacts return to their normally grounded position.

The RH Front, LH Rear and RH Rear Windows can be operated by two separate switches. One being in the LH Front Power Window/Door Lock Switch and the other being the individual switches located on each door. When either the RH Front, LH Rear or RH Rear Window Switch in the LH Front Power Window/Door Lock Switch is depressed, its DOWN contacts close, thus allowing voltage to be applied through the contacts of the appropriate Window Switch (located on the door) to the Window Motor. The Window Motor is grounded through that particular Window Switch (located on the door) and the normally grounded UP contacts of the LH Front Power Window/Door Lock Switch to G200.

With both power and ground supplied to the motor, it begins to turn and open the window. The Window Motor will stop once the window is completely open, via an ECB within the motor, or whenever the Window Switch is released. By releasing the switch, the DOWN contacts return to their normally grounded position. Closing the RH Front, LH Rear or RH Rear Window is accomplished by pulling up on the appropriate Window Switch in the LH Front Power Window/ Door Lock Switch. By pulling up on the switch, the UP contacts close, thus allowing voltage to be applied through the appropriate Window Switch (located on the door) to the appropriate Window Motor.

In this case, the Window Motor grounds through that particular Window Switch and the normally grounded DOWN contacts of the LH Front Power Window/Door Lock Switch to G200. With both power and ground supplied to the motor, it begins to turn and closes the window. The Window Motor will stop once the window is completely closed, via the ECB, or whenever the Window Switch is released. Once the switch is released, the UP contacts return to their normally grounded position. The other method of operating the windows is through the Window Switches located on the RH Front, LH Rear and RH Rear Doors. When any one of these switches are depressed to the DOWN position, the DOWN contacts of that switch close, and voltage is applied directly through that switch to the appropriate Window Motor. The Window Motor grounds through the switch that was depressed and also through the normally grounded UP contacts of the LH Front Power Window/Door Lock Switch to G200.

With both power and ground supplied to the motor, it begins to turn and open the window. The motor will stop when the window is completely open, via the ECB, or whenever the Window Switch is released. By releasing the switch, the DOWN contacts return to their normally grounded position. By pulling up on the RH Front Power Window Switch or by depressing either of the rear Window Switches to the UP position, the UP contacts of that switch close. This allows voltage to be applied directly through the appropriate switch contacts to the other side of the Window Motor. In this case the Window Motor grounds through that particular switch and through the normally grounded DOWN contacts of the LH Front Power Window/Door Lock Switch to G200. With both power and ground supplied to the motor, it begins to turn and closes the window. The Window Motor will stop once the window is completely closed, via the ECB, or whenever the Window Switch is released. Once the switch is released, the UP contacts return to their normally grounded position.

The LH Front Power Window/Door Lock Switch also contains circuitry for the AUTO DOWN and WINDOW LOCK features. The AUTO DOWN feature allows the LH Front Window to open automatically to the fully open position. When the LH Front Window Switch is depressed to the AUTO DOWN position, the Auto Down Control circuitry pulls and holds the DOWN/AUTO DOWN contacts of the LH Front Window Switch closed. With these contacts closed, the LH Front Window Motor will operate in the same manner as described earlier. When the window is completely open, the ECB and the control circuitry force the DOWN contacts to open, thus stopping the Window Motor. The WINDOW LOCK feature allows the RH Front, LH Rear and RH Rear windows to be locked out. When the Window Lock Switch is depressed, only the LH Front Window is operational via the LH Front Power Window/Door Lock Switch.