Here is a Auto dimming Rearview Mirror wiring diagram
 

Please post a reply if you use this. Thanks!

Hello all,

There have been many threads asking about a auto dimming mirror's wiring diagram. I thought about putting in a auto dimming mirror in my Jeep YJ, since I'm so used to it on my monte. So I dug all around the internet and found multiple wiring diagrams that only give a bit of information. After cobbling many together I came to a solution. MIght be a few years late but now anybody can put one in their monte carlo or another vehicle

If you don't have ONstar, then you only need 4 wires. See my image below for details as some pins/wires switch depending on your options. I have my car's option codes listed on the right side, though I forgot to add I have UE1. Pin numbering is on the harness's connector on the mirror. I made a diagram on the top left just in case you can't see. More information is on the bottom left for some things.


Attachment 36372


Pin setup if you can't read my handwriting
Pin 1 - Gray - Goes to courtsey lamp control which grounds it, likely when you turn on the dome lights. Also maybe needed for BCM controlled theather lighting dimming? not needed for auto dimming --- may be white in some models
Pin 6 - Blue/white stripe - 12v input for light bulbs you can turn on and off, not needed for autodimming -- Maybe orange in some models
Pin 8 - Black - GROUND
Pin 9 - Light green - Reverse 12v input - Will unDim mirror when reversing and only when reversing. Need to connect to 12v that is energized only when reversing
Pin 13 - Brown - Ignition 3 voltage meaning voltage when key is set to ON, required for Auto dimming


MINIMUM SETUP -To have function lamps when buttons are pressed and to have auto dimming
Pin 6
Pin 8
Pin 13

Recommended setup - Removes auto darkening when reversing
Pin 6
Pin 8
Pin 9
Pin 13

Deluxe Setup -Probably for monte carlo's only, you get BCM controlled theather dimming
Pin 1
Pin 6
Pin 8
Pin 9
Pin 13