Windows: Description and Operation

A Permanent Magnet (PM) Motor operates each of the power windows. Each motor raises or lowers the glass when voltage is supplied to it. The direction the motor turns depends on the polarity of the supply voltage. The window switches control the supply voltage polarity.

Each motor is protected by a built-in circuit breaker. If a window switch is held too long with the window obstructed or after the window is fully open or closed, the circuit breaker opens the circuit. The circuit breaker resets only after voltage is removed from the motor.

LF Window Switch Operation
When the Ignition Switch is in "RUN," "ACCESSORY," or in Retained Accessory Power, battery voltage is applied to the LF Window Switch through the PWR WDO Circuit Breaker and CKT 143. When any of the up switches in the LF Window Switch are operated, battery voltage is applied to the Window Regulator Motor. The Window Regulator Motor is grounded through the down contact in the LF Window Switch. The motor runs to drive the window up. When any of the down switches in the LF Window Switch are operated battery voltage is applied to the Window Regulator Motor in the opposite direction. The Window Regulator Motor is grounded through the up contact in the LF Window Switch. The motor runs to drive the window down.

Express Down Feature
If the "DN" position in the LF Window Switch is momentarily pressed down past the first defeat, the window will travel to the fully down position. To stop the window, press the LF Window Switch to the "UP" position.

Lock Out Switch Operation (4 Door)
The LF Window Switch contains a Lock Out Switch which will remove battery voltage from the other window switches. This will not allow the operation of the windows from their individual switches. The windows can still be operated as normal from the LF Window Switch.

Window Switch Operation
When the Ignition Switch is in "RUN," "ACCESSORY," or during Retained Accessory Power, battery voltage is applied to the window switches through the PWR WDO Circuit Breaker (CKT 143) (2 Door) and the LF Window Switch (CKT 1307) (4 Door) to the switches. When the "UP" position in the RF Window Switch is pressed, battery voltage is applied to the RF Window Regulator Motor through the DK BLU (CKT 666) wire. The motor is grounded through the BRN wire (CKT 667), the down contact in the RF Window Switch, the TAN wire (CKT 167), and the down contact in the LF Window Switch. The motor runs to drive the window up. When the "DN" position in the RF Window Switch is pressed, battery voltage is applied to the RF Window Regulator Motor in the opposite direction through the BRN wire (CKT 667). The Motor is grounded through the DK BLU wire (CKT 666), the up contact in the RF Window Switch, the LT BLU wire (CKT 166), and the up contact in the LF Window Switch. The motor runs to drive the window down. The other windows operate similarly from their individual window switches.