i am trying to wire my new headunit but i dont have any info on the wire colour codes on the bmw
here are the colours
Grey / White Line
Purple / White line
Blue / Brown Line
Blue / Red Line
Blue / Grey Line
Blue/ Purple Line
Yellow / Blue Line
Yellow / Brown Line
Yellow / Grey Line
Yellow / Red Line
Red / White Line
According to my 1998 328i Bentley manual wiring diagram, here's the breakdown:
red/white = hot at all times
brown = ground
white = antenna amplifier
violet/white = hot in ACCY, run and start
blue/brown = right front high range speaker (this also branches to rt fr low range)
blue/grey = right rear speaker
blue/violet = right rear speaker
yellow/brown = left front high range speaker (this also branches to lt fr low range)
yellow/grey = left rear speaker
yellow/red = left front low range speaker ) this branches to left front high range)
blue/red = right front high range speaker
I don't see a yellow with blue but there is a yellow/violet which = left rear speaker.
Also, your grey/white line is either for the interior light system or amplifier.
So what your saying is that you didn't buy an aftermarket wiring harness when you bought your new deck? Makes it kinda difficult if you didn't. But oh well, here's the wiring diagram you seek. I would seriously think about picking up a metra harness, makes things a lot easier...
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