Windows: Description and Operation

CIRCUIT OPERATION
A Permanent Magnet (PM) Motor operates each of the Power Windows. Each motor raises or lowers the glass when voltage is applied to it. The direction the motor turns depends on the polarity of the supply voltage. The switches control the supply voltage polarity.

The Master Switch Assembly controls all of the motors. Each Window Switch controls only one of the motors.

Each Motor is protected by a built-in electronic circuit breaker (PTC). If a Window Switch is held too long with the window obstructed or after the window is fully up or down, the PTC resistance increases. The resistance returns to normal after voltage is removed from the motor terminals.

Master Switch Assembly Operation
When the Ignition Switch is in RUN, battery voltage is applied to the Master Switch Assembly through the WDO Circuit Breaker and the PNK wire. When any of the UP Switches in the Master Switch Assembly are operated, battery voltage is applied to the Window Motor through the associated Window Switch and the DK BLU wire. The Window Motor is grounded through the DN contact in the Master Switch Assembly. The motor runs to drive the Window up. When any of the DN switches in the Master Switch Assembly are operated, battery voltage is applied to the Window Motor in the opposite direction through the BRN wire. The Window Motor is grounded through the UP contact in the Master Switch Assembly. The motor runs to drive the Window down.

Window Switch Operation
When the Ignition Switch is in RUN, battery voltage is applied to the Window Switches through the WDO Circuit Breaker and the PNK wires. When the UP Switch in the RH Front Window Switch is operated, battery voltage is applied to the RH Front Window Motor through the DK BLU wire. The motor is grounded through the BRN wire, the DN contact in the RH Front Window Switch, the TAN wire in the DN contact in the Master Switch Assembly. The motor runs to drive the Window up. When the DN Switch in the RH Front Window Switch is operated, battery voltage is applied to the RH Front Window Motor in the opposite direction through the BRN wire. The motor is grounded through the DK BLU wire, the UP contact in the RH Front Window Switch, the DK BLU/WHT wire and the UP contact in the Master Switch Assembly. The Motor runs to drive the Window down. The other Windows operate similarly from their individual Window Switches.