Thread: Wire Colors ?
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      01-31-2013, 06:37 PM   #6
drbvac
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Drives: 2006 BMW M COUPE
Join Date: Dec 2008
Location: Charlottetown PEI, Canada

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Good info to remember if behind dash looking for wiring

Here is a great bit of info and I can confirm that two of the colours are correct!!

Brown is ground
- it is uncovered and stripped in the bundle going to the gauges

Grey and Red
is a dimmer power 12 V - same as dash lights - will go up and down with wheel on dash. IT is stripped a bit in the bundle going to the switch and dimmer wheel.

If you are trying to decypher BMW wiring diagrams, it's rather essential to realise that:

BL=blue
BR=brown
GE=yellow
GN=green
GR=grey
OR=orange
RT=red
SW=black
VI=violet
WS=white

Some advice I received a long time ago from wiring guru Ron Styger of Unoffical BMW fame:

In general, a solid red wire is hot at all times.
A red wire with any color stripe is hot at all times after a fuse.
In general, a solid green wire is hot in run and start.
A green wire with any color stripe is hot in run and start after a fuse.
In general, a solid violet wire is hot in accessory, run and start.
A violet wire with any color stripe is hot in accessory, run and start after a fuse.
In general, brown is ground.
Gray with a red stripe is dimmed lighting.
I can't vouch for any of it myself, but Tim generally knows that of which he speaks. Hope it helps!
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2006 M COUPE - 380 total production, 1 of 40Imola Red produced for NA , ESS 455 Supercharger, Speedhut Gauges, VPM CLS wheels, 19" Hancooks, Stromung Exhaust, Carbon fibre accessories and black and white badging,
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