Bmw E34 540i Wiring Diagram

Im going to sticky this if the OP doesnt mind? Id like to rename the thread if you wont take offence, just remove the 1995 part? is that okay?

Please note, to people using this in the future, european market cars will be very similar if not identical, but some further research may be required.

It will also be of NO use to 520i owners, they run a totally different body loom to other E34 models

There has been tons of threads about how to wire your stereo system.
There is a PDF online however the link is broken.
So I took it upon myself to upload a copy

A/D/S e34 stereo system schematic

Thanks

Great help in understanding what goes on behind the scene of all those wires, lol. Thanks for the info.

thanks for the manual for electrical trouble shooting.
if you know the answer to my question please reply.
1.I have 1995 525i sedan my key remote aceess for door lock stop working & Alarm system stopped working.

Is the battery in the remote good?

BMW Repair Manual: 5 Series (E34): 1989-1995
The BMW 5 Series (E34) Service Manual: 1989-1995 is a comprehensive, single source of service information and specifications specifically for BMW 5 Series from 1989 to 1995. The aim throughout this manual has been simplicity, clarity and completeness, with practical explanations, step-by-step procedures and accurate specifications. Whether you're a professional or a do-it-yourself BMW owner, this manual will help you understand, care for and repair your E34 5 Series.

Though the do-it-yourself BMW owner will find this manual indispensable as a source of detailed maintenance and repair information, the BMW owner who has no intention of working on his or her car will find that reading and owning this manual will make it possible to discuss repairs more intelligently with a professional technician.

Models and engines covered:
525i (M20 with DME 1.3) 1989-1990
525i (M50 with DME 3.1) 1991-1992
525i (M50TU/VANOS with DME 3.3.1) 1993-1995
530i (M60 with DME 3.3) 1994-1995
535i (M30 with DME 1.3) 1989-1993
540i (M60 with DME 3.3) 1994-1995

I need a pinout for my harness.

Hello fellow BMW folks....

I am seeking the 55 pinout on a 1.3 motronic harness for an 179 ECU that I wish to piggyback with my Haltech ECU.

The wiring I have on my OEM ECU starts with Pin 1 = Red/White, Pin 2 = Red, Pin 3 = Brown/Black, Pin 4 = Brown/Blue, Pin 5 = brown/Grey, Pin 6 = Empty, Pin 7 Empty, Pin 8 = Yellow, Pin 9 = Black, and Pin 10 is Empty. Is there any 55 pinouts that represent these first 10 wires? Please contact with whatever information you may know, so that I can proceed with this undertaking.

Thank you very much.

Brian

I have a question about my dash lights. Sometimes when I turn on my lights at night the lights for the air con controls light up and sometimes they don't light up until I hit a speed bump or something. Is it just the lights I the dash or do I need to fix some circuitry?

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Thanks

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Hello everyone... My BMW 525i isn't getting any power to the fuel pump fuse I have changed the fuel filter already but when I did that the fuel fuse went out can someone please tell me what I should do?

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Could be a bad regulator, bad window switch, or GM acting up.

We need more info.