An electric window circuit

A typical system is similar in many respects to a manual window-winding mechanism, except that the manual winder handle is replaced by a motor.

The system usually consists of a two-way control switch in the dashboard or centre console, wired via two circuits to a motor in each door. One switch position and circuit drive the motor one way to wind the window up; the other switch position and circuit wind the window down.

The switch is wired to the battery via a relay and a fuse or a circuit breaker.