Circuit Description

Power Mirrors

How the Circuit Works

The Left and Right Power Mirrors are controlled by the Power Mirror Switch. Each power mirror has two reversible motors: one motor moves the mirror up and down, and the other motor moves the mirror left and right.

The Power Mirror Switch contains three switches to control mirror direction and two switches to select the Left or Right Power Mirror. With the ignition switch in ON (II), battery voltage is supplied to the Power Mirror Switch through fuse 16 (in the driver's under-dash fuse/relay box).The mirror selection switch directs voltage from two of the direction switches to either the Left or Right Power Mirror.

Mirror Up

With the Power Mirror Switch in the UP position, Switch 1 is moved to the A position. Switch 1 supplies battery voltage to the Left Power Mirror Up/Down Motor and the Power Window Master Switch. If the mirror selection switch is in the LEFT position, the Left Power Mirror Up/Down Motor is grounded through the mirror selection switch and Switch 2 in the B position.

If the mirror selection switch is in the RIGHT position, the signal for UP is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Up/Down Motor.

Mirror Down

With the Power Mirror Switch in the DOWN position, Switches 2 and 3 are moved to the A position. Switch 2 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Up/Down Motor is grounded through Switch 1 in the B position. When Switch 2 is moved to the A position, it also supplies battery voltage to the Left Power Mirror Left/Right Motor. With Switch 3 in the A position, battery voltage is supplied to both sides of the Left Power Mirror Left/Right Motor so it does not move.

If the mirror selection switch is in the RIGHT position, the signal for DOWN is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Up/Down Motor.

Mirror Left

With the Power Mirror Switch in the LEFT position, Switches 1 and 2 are moved to the A position. Switch 2 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Left/Right Motor is grounded through Switch 3 in the B position. When Switch 2 is moved to the A position, it also supplies battery voltage to the Left Power Mirror Up/Down Motor. With Switch 1 in the A position, battery voltage is supplied to both sides of the Left Power Mirror Up/Down Motor so it does not move.

If the mirror selection switch is in the RIGHT position, the signal for LEFT is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Left/Right Motor.

Mirror Right

With the Power Mirror Switch in the RIGHT position, Switch 3 is moved to the A position. Switch 3 supplies battery voltage to the Left Power Mirror or to the Power Window Master Switch depending on the position of the mirror selection switch.

If the mirror selection switch is in the LEFT position, the Left Power Mirror Left/Right Motor is grounded through the mirror selection switch and Switch 2 in the B position.

If the mirror selection switch is in the RIGHT position, the signal for RIGHT is sent via UART to the Front Passenger's Power Mirror Switch. The Front Passenger's Power Mirror Switch supplies battery voltage and provides ground to the Right Power Mirror Left/Right Motor.