Auto-Dimming Rear-View Mirror
I got this mirror from a junkyard Cadillac Eldorado.
The wiring harness has 3 wires. According to diynetwork.com, there should be a Power, Ground and Reverse Light wire. The Reverse Light wire is so that the dimming is turned off while going in reverse.
- Power: Magenta/Black +12V
- Ground: Black
- Reverse: Green +12V