Re: Stereo wiring for '98 M3

["Mike Theuri" <mikesoft@xxxxxxxxxxxxxx>]

A number of different possibilities, if you get no error when you
use the band button to switch between different modes it could be
that the replacement head unit was the wrong replacement and thus
will not work with the correct cd changer for your car. To eliminate 
the cd changer, you need to check if it will load/unload. If it does 
that then the problem probably lies with the stereo head unit. I have
the schematic but its really tiny, I can attempt to scan it and see if 
I can enlarge it a little bit. If you have a bentley it should be in the 
back pages under electrical wiring diagrams. Hope that helps. 

Mike Theuri
93 318i


- ----- Original Message ----- 
From: "Paul De Zan" <dezan@domain.elided>


> Sometime before I bought it, my M3's stereo head unit was apparently
> stolen. When I installed the factory CD changer and plugged the power
> and data cables into it, the head unit didn't recognize it. I pulled the
> unit out of the dash and discovered:
> 
> a) it was a salvaged part (found a warranty label from a parts dealer)
> b) the data cable connector had been cut off
> c) the harness wiring had been SOLDIERED DIRECTLY ON TO THE PINS OF THE
> HARNESS CONNECTOR SOCKET
> 
> Sorry about the caps, but I still can't believe it.
> 
> So...I went out and bought a new data cable, and plugged it into the CD
> and the head unit. Still no comprende CD.
> 
> I suspect one of two things is wrong:
> 
> 1) The harness wiring is not correct, and the head unit is not getting
> some signal it needs to be able to switch to CD mode (everything else
> works fine)...two pins (numbers 7 and 8) are not connected to anything
> 
> 2) The head unit need to be "told" that the CD is there manually, in
> some way I haven't discovered.
> 
> So...does anybody have the schematic for this set up or know where I can
> get it?
> 
> Thanks...
> 
> ---
> pld (I don't know who's worse: the stereo thief or the guy with the
> soldiering iron...)
> 
> 
> 
> 
> 
> 
> 
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