Rear View Mirror wiring

scrawshaw said:

I installed a Blendmount Mirror Tap for my radar detector and found a multicolor ground wire and a multicolor power wire on the harness that goes into the back of the mirror (on the drivers side of the plug), but when I put the car in reverse, the power is cut to the radar detector. Probably has something to do with not wanting an auto-dimming mirror dimming when you are going in reverse, but I don't know what the 2 other wires going to the mirror (both solid grey) do and if they might stay hot even when in reverse. It is kind of a pain to test those grey wires. It is only a slight pain to have the detector turn off when you go in reverse. Anyone have any thoughts about the grey wires?

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scrawshaw said:

Thanks for pointing this thread out to me! For some reason, I couldn't find it. I just read the whole thread and found that someone else with the PP and the 50th anniversary package (that is what I have, in addition to it being a Premium with Subwoofer/BLIS/Memory Seats and Nav) also found that either ground wire position turn off when in reverse. Unless someone figures out something that works for the options I have, I guess I'll just have to spend more time with the multimeter or put up with the reverse issue.

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