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F80 M3 (Sedan) / F82 M4 (Coupe) / F83 M4 (Convertible) : (2015-TBD) Discuss the 5th Generation M3


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Old Tue, Sep-26-2017, 12:13:52 AM   #1
cek
S54 E28
 
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Default Using Mirror / Dome Light Power for Radar Detector

I'd like to tap into either the mirror or dome light power for my radar detector install (like this guy did in the E36: http://www.m3forum.net/m3forum/showthread.php?t=445897).

This is for a 2017 M4 coupe.

In our case it's not clear what wires are what, and the connectors are much smaller than they used to be and the RJ11 taps won't (easily) work.

Here's some pics to show:


This is what it looks like under the plastic cover that covers the mirror mount:


Anyone know which of those wires is ignition switched +12v/ground?

Here's the tap I bought:




Separately, if that doesn't work, how do you get the overhead console off to access the wiring that powers the dome lights?

Thanks.
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Old Sat, Sep-30-2017, 05:00:42 PM   #2
cek
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Default Re: Using Mirror / Dome Light Power for Radar Detector

Bump. Anyone?
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Old Sun, Dec-03-2017, 11:17:04 PM   #3
BennyZ
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Default Re: Using Mirror / Dome Light Power for Radar Detector

You should be able to take a voltmeter and stick the probes down the backside of those harness plugs.
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Old Tue, Dec-05-2017, 02:03:27 PM   #4
sosheal
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Default Re: Using Mirror / Dome Light Power for Radar Detector

These might help (if you haven't already solved your problem):

http://f30.bimmerpost.com/forums/sho...d.php?t=780561
http://f80.bimmerpost.com/forums/sho...&highlight=eas
http://f80.bimmerpost.com/forums/sho....php?t=1026319
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Discussing Using Mirror / Dome Light Power for Radar Detector in the F80 M3 (Sedan) / F82 M4 (Coupe) / F83 M4 (Convertible) : (2015-TBD) Forum - Discuss the 5th Generation M3 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)