This Auto Car Motor Power Window circuit is working on simple timer circuit using transistor, How the Car Power Window work with automatic up and down for once toggle switch? its simple on Power Window using a motor to drive a power window regulator up and down. So the car window can auto move. If there is broken on the timer circuit, you can using this circuit.
This circuit works on a car battery voltage of 12 volts.
By giving the input voltage + is used in the power window buttons, go to the base of transistor D438 in the key once will be stored by the capacitor voltage. In a few seconds the transistor will work to control the relay. and relay functions to flip through the incoming voltage to the power window motor