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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

 
 
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Old 10-26-2005, 12:35 PM   #1
noelep
Registered User
 
Join Date: Oct 2005
Location: England
Posts: 21
My Ride: E46 M3
12V Constant & Switched Power

I know this sort of question has been asked before - but I have searched all the forums and can't find an answer that addresses my needs. If anyone can help I would really appreciate it.

I have a 2003 E46 M3, and have fitted a speed camera detector. I have the GPS aerial on the back shelf, a laser detector on the headlining by the rear-view mirror and the display unit on a Brodit Proclip over the driver-side air vent.

The control unit is behind the steering-wheel panel.

Everything works fine, but at the moment I am running it from the cigarette lighter. I need a source of 12V switched and constant power, as well as a good grounding spot. There are quite a few thread all over the place about this, but none of them really do the trick.

1) Power from sunroof/garage-opener. No good, I don't have a sunroof, and there is no removable panel in the headliner.

2) Power from back of radio. I have MkIV Nav system, and I can't for the life of me get it out. I have had all the trim and the vents out, but I can't release the (I assume) spring clips holding it in.

3) Power from armrest console (i.e. telephone harness). Possible, but I don't really want to be ripping all that out.

4) Power from trunk/boot - seems like an awful long way to go.

5) Power from ignition wires - this seems like the best bet, but the only DIY I found on it was for a 330, and the red/green wires he referred to don't seem to be under the panel under the steering wheel. The only wires I can see are for the OBD.

Anyone have any input or ideas?

Thanks in advance
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