For 1990-2009 cars

A Permanent Magnet (PM) Motor operates each of the power windows. Each motor raises or lowers the glass when the voltage is supplied to the motor. 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 up or down, the circuit breaker opens the circuit. The circuit breaker closes only after voltage is removed from the motor.

### LF Window Switch Operation

When the ignition switch is in the RUN position, battery voltage is applied to the LF window switch through the PWR WDO Circuit Breaker 30A and circuit 141. Battery voltage is applied (circuit 164) to the window regulator motor when the up switch in the LF window switch is operated. The window regulator motor is grounded through the down contact in the LF window switch (circuit 165) and circuit 750. The motor runs to drive the window up. When the down switch in the LF window switch is operated, the 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.

The LF window switch also controls the right window. Refer to RF window switch operation for details on how the right window operates.

### Express Down Feature

The window will travel to the fully down position if the down position in the LF window switch is momentarily pressed down past the first detent. Press the LF window switch to the up position in order to stop the window.

### RF Window Switch Operation

The battery voltage is applied to the RF window switch from the PWR WDO Circuit Breaker 30A and circuit 141 when the ignition switch is in the RUN position. The battery voltage is applied to the RF window regulator motor through circuit 666 when the up position in the RF window switch is pressed. The motor is grounded through circuit 667, the down contact in the RF window switch, circuit 167, and the down contact in the LF window switch, and circuit 750, ground G302. The motor runs to drive the window up. The battery voltage is applied to the RF window regulator motor in the opposite direction through circuit 667 when the down position in the RF window switch is pressed. The motor is grounded through circuit 666, the up contact in the RF window switch, circuit 166, the up contact in the LF window switch, and circuit 750, ground G302. The motor runs to drive the window down.