ok you have 3 wires from the multiplug of the mirror.1=is black which is earth,then you have 2 green & red wires,one of em is for reverse which is not needed as it does is switches off the mirror for clearer view & not dimming it if strong light hits it,as there's off button on mirror already,the other green/red wire goes to i think pin 16 on (i'll double check this ) on headlight switch so it turns the mirror on when sidelights are on. its a doddle ,i'll do how to on this when time permits me.yunii