Curt
Sometimes when I close my eyes, I can't see.
Anytime, good luck! Also, I forgot to mention to test the temp probe and see if that is still working. I forgot how to test it, maybe someone could chime in.Thank you
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Anytime, good luck! Also, I forgot to mention to test the temp probe and see if that is still working. I forgot how to test it, maybe someone could chime in.Thank you
I just got a mirror and harness off a 99 denali. The harness also has a 2 pin connection with orange and yellow w/black strip that also plugs into the mirror. Whats that pin for?Great write up. I have a dual display in my 02, and autodim without displays in the 88 and 99 (OH consoles have the compass/temp in them instead).
Two things to point out.
1. You don't have to wire anything to the backup light signal, I haven't in all the mirrors I've installed and they will still work normally.
2. You can disable the autodim by holding the "Temp" button until the green indicator light turns off.
Here is the plug and wiring diagram. if you connect the green backup wire to 12V it will NOT dim.
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The GMT400 Escalade/Denali has some additional functions for the truck's automatic lighting that ran through the mirror.I just got a mirror and harness off a 99 denali. The harness also has a 2 pin connection with orange and yellow w/black strip that also plugs into the mirror. Whats that pin for?
If you have a digital multimeter set it for 20K ohms and test the probe, my probe measured 18.37 ohms. Rather odd that you didn't get an OC (open circuit) or an SC (short circuit), usually it'll display something...
I realize this is an old thread but it was recently helpful to me. The only thing I'd like to add is the image below. It shows the location of the Lt Green Reverse wire, backup lights wire, Back-up Lamp Feed, reverse light hot wire, etc. Whatever you want to call it.
There is a two wire harness, with a four wire connector, that goes to the back of truck. You can easily locate it by laying under the driver's side of the truck just behind the front wheel. It's on the inside of the frame. Follow that harness up to the engine bay. See below.
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From my understanding of the wiring pinout that I got from stroker52 pin 4&5 are used to tell the outside mirrors to dim when the inside mirror dims. I'm not actually aware of any external mirrors for the GMT-400 that have the ability to dim.