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lighted rear view mirrors


Well-known member
Nov 1, 2001
southern california
1982 convertible (not factory) stock 350cfi auto
can anyone tell me which wires are which on this mirror its from a 97 gm car has three wires ... I figure I can get power to it using the sunvisors vanity mirror wires since our car doesnt have that anymore, but why did GM use three wires, I dont think its a auto dimming mirror

thanks for the help
Just a guess, but if it's anything like the one on my Monte, the third wire controls the "theatre lighting" feature. When I open the doors, the dome light and the lights on the mirror come on. The other lines are for the ground and constant power. I suppose you could disconnect the 3rd wire unless you want to route it all over creation to meet up with something else switched by the door button.

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