Windows: Description and Operation

CIRCUIT OPERATION
Power Window 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 switches control the supply voltage polarity.

The LH Front Window Switch is the source of voltage and ground for the other window switches.

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 up or down, the circuit breaker opens the circuit. The circuit breaker resets only after voltage is removed from the motor.

LH Front Window Switch Assembly Operation
When the Ignition Switch is in "RUN," battery voltage is applied to the LH front window switch through the power window circuit breaker and Circuit (CKT) 141. When any of the UP Switches in the LH Front window switch are operated, battery voltage is applied to the window motor. The window motor is grounded through the DN contact in the LH front window switch. The motor runs to drive the window up. When any of the DN Switches in the LH front window switch are operated battery voltage is applied to the window motor in the opposite direction. The window motor is grounded through the UP contact in the LH front window switch. The motor runs to drive the window down.

If the LH Front DN Switch in the LH Front Window Switch is momentarily pressed down past the first detent, the window will travel to the fully down position.

4 Door or Convertible Only
The LH front window switch contains a lockout 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 LH front window switch.

All Windows Automatic Down Feature (Convertible Only)
The All Windows Automatic Down (AWAD) feature causes all windows to go completely down after a single, momentary touch (at least 1/3 second) of the two rear window switches on the driver's master control to the "DOWN" position. When the AWAD feature is activated, a solenoid in the AWAD Module holds the switches in the "DOWN" position. The windows may he stopped by momentarily pushing the switches to the "UP" position.

The AWAD Module monitors window motor current through resistors. It will release the DN Switches and stop the windows when the current increases or when it becomes zero. An increase in current occurs when motors stall at the end of their travel. Zero current occurs when switches are pushed to the "UP" position, removing ground from the motors.

Window Switch Operation
When the ignition switch is in "RUN," battery voltage is applied to the window switches through the circuit breaker (2 Door), the LH front window switch (4 Door), and CKT 141 to the switches. 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 and the DN contact in the RH Front Window Switch, TAN wire, and the DN contact in the LH front window switch. The motor runs to drive the window up. When the DN 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 LH front window switch. The motor runs to drive the window down. The other windows operate similarly from their individual window switches.