Power Window Switch: Description and Operation

Power Window Switches





The window switches are located in the switch pack situated in the lower part of the center console. A single connection is used to connect the switch pack to the vehicle harness.



Each Power Window Switch is a two position spring loaded switch. When pressure applied to the switch in either direction is released the switch will return to a middle neutral position.

The Power Window Switches provides a switched ground signal to the BC1 requesting window activation. A momentary touch of the switch (less than 400ms) activates the one-touch operation. A longer touch of the switch (more than 400ms) signals the BC1 for conventional window operation.

Window Motor
Polarity is reversed in the BC1 to control motor operation up/down. Current draw of the motor during its entire operating range is monitored by the BC1 and the motor stopped when current or time limits are exceeded.

Interior Central Locking Switch
The Interior Central Lock Switch is a two position spring loaded switch. When pressure applied to the switch in either direction is released the switch will return to a middle neutral position.

The interior central lock switch supplies a switched ground signal to the BC1. Pressing and holding the switch in the unlock position requests convenience opening of the windows and sunroof from the BC1. The convenience opening operation lasts as long as the switch remains depressed.

Door Latch with Micro Switches
The drivers door Lock/Unlock micro switch provides a switched ground input to the BC1. Holding of the key in either the lock or lock position for longer than 1 second will request convenience opening/closing of the windows. The opening/closing operation continues as long as the key is held or until the windows are open/closed. The door position micro switches provide a switched ground signal to the BC1 indicating door position. A high signal at the BC1 indicates the door is open and a low signal indicates the door is closed.

Inertia Switch
In the event of an impact registering greater than 14G the Inertia Switch goes open. This open removes the voltage from X254 pin 21 at the BC1(J3 54-pin Natural connector) and causes the BC1 to lower the windows on a time basis of 750ms.