i have an 01 gt sedan that did not come with the auto dimming mirror, so i purchased one at the subaru dealer i work at, hooked it up right....but the dimmer does not work but compass does????? i covered up the hole in the back and front but it will not darken., there are three wires to the mirror i have ground on 2 and 12v on another .,.......any ideas???
thanks in advance
chris

shine a light in the receptor in the back

well i mean where the mirror is like there are head lights shining on it

now please donate scooby snacks to me

defective mirror....thanks!