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-   -   Deciphering Bentley wiring diagrams... (http://www.bimmerfest.com/forums/showthread.php?t=57374)

beberle 04-08-2004 05:08 AM

Deciphering Bentley wiring diagrams...
 
:dunno: I've got a headache. I've been a DIYer for 20 years, but this is my first BMW. Ouch! How do you read the Bentley wiring diagram? All I want to know is the tail light wire color-code/functions. Nowhere are they listed turn signal, brakes, running light on the same page. Something's wrong when the wiring diagrams take 200 pages!! The wiring diagrams on the C-130's that I used to maintain weren't this complicated ;-)
Any hints are appreciated.

rwg 04-08-2004 03:22 PM

Interesting that you blame Bently and not BMW. :D I suppose it is possible that Bentley made the diagrams unnecessarily complicated, but I kind of doubt it.

If it were me, I would try reading them after the third beer. They might make more sense that way.

Kaz 04-08-2004 03:26 PM

The majority of the time, there's no direct answer for that. Pin number and color code are easy; they're there on the diagrams. Function? Sometimes there's really no way to know, especially since so many of them are 'black-boxed' and BMW doesn't want to tell you.

Sometimes, tracing that wire through to whatever's on the other end helps. Light wiring on a E46 generally centralizes back to the LCM in the dash. Good thing about that is that we've already figured that part out.

beberle 04-09-2004 04:33 AM

So I haven't developed Alzhimer's yet... whew! I was worried. Is there a DIY posted anywhere? I've searched several sites w/ no luck on color-codes. Otherwise I'll just pull out the light probe, but I had hoped the Bentley would provide a little more value for the $$.


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