Compass temperature auto dimming mirror gmt400

[JustinJ94FSB]

Have a 1994 k blazer and I am doing the mirror install from a newer Tahoe. I have all the wires ran to the temp sensor and the mirror. I have the 3 main wires routed down near my fusebox. I have the pink, black, lt green wires. The black is easy, just ground it. The pink one I need to tap into an ign power source. As for the lt green one, 8 am supposed to tap into a reverse light wire? Anyone able to help me figure out where under the dash I might find such a wire? Or the color are least so I can poke around with my multimeter? I suck at wiring diagrams and I can't even seem to find one for this . Just trying to figure out the reverse light wire color so I can tap it. Also if anyone has recommended spot to tap the 12v ign wire for the mirror as well I'm all ears, otherwise I'll figure that one out. Thanks

 

[MIHELA]

That green wire un-dims the mirror when the truck is shifted to reverse. It's not critical it be hooked up. If there is a light bright enough to cause the mirror to dim while backing up at night you can always manually turn the mirror off.

 

[95C1500]

Ground the green wire if you don't want to mess with finding a reverse wire. That's what I did.

 

[JustinJ94FSB]

Ground the green wire if you don't want to mess with finding a reverse wire. That's what I did.

I ended up grounding it to just test the mirror and i think I'm gonna be fine with it like this. If I end up reversing into a spot light at night and I struggle to see I might mess with it. And if that's the case I just have to figure out which wire and tap it. But for now all is well. Ty my dudes.