How do I repair a self-tinting car rear view mirror?
I have a 2002 Acura TL. It has a self-tinting rear view mirror that, as the name suggests, tints itself at night when there are lights behind you. The thing no longer tints. Is there a quick fix for this? The guy at the dealer, without even looking at the mirror, said he thinks it's the "multi-plexor." Anybody ever heard of this?
I've checked the fuses and can't find any burned out. I'd rather not replace the mirror if I can avoid it.
Any thoughts?
The dimming circuit for the mirror works on the principle of differential - i.e. if the light coming at the mirror from the rear of the car as detected by a sensor on the face of the mirror is significantly brighter then the light striking the back of the mirror as detected by a photo sensor on the backside of the mirror, the circuit energizs the electrochromic surfce in the mirror (or, on older models, activates a motor that physically tilts the mirror).
A quick check - there should be a small hole in the face of the mirror, and a sensor on the rear - are they covered by hanging objects?
Also - is the mirror dirty? Especially if you smoke; you may have to clean the face of the mirror.
Make sure that the mirror is firmly plugged in a small plug, usually at the base of the mirror.
Donelly, Gentex and Mito manufacture most of these mirrors.
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