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2004 bmw z4 wiring

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131461
Printed Date: May 12, 2025 at 1:45 AM


Topic: 2004 bmw z4 wiring

Posted By: tjtinter
Subject: 2004 bmw z4 wiring
Date Posted: May 22, 2012 at 8:40 AM

I'm having problems finding the correct lock/unlock wires, and the brake wire. According to the schematic I have these wires do not match up. Also at the brake switch I can't get any one of the 4 wires to test positive when the brake is applied. I have checked this with the key on too. If anyone could help out in any way it would be greatly appreciated......thanks....



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@lw@yz$uited



Replies:

Posted By: howie ll
Date Posted: May 22, 2012 at 5:35 PM
Look in the loom coming from the driver's door at the driver kick panel, WHITE/ black lock and RED / blue unlock. Both NEG (-) extend the lock time pulse for windows and possibly roof.
Brake wiring on this model is BLACK/ blue on one side (front to rear carpet edge loom) and black blue the other side.
Trunk trigger is WHITE/ brown (-) and trunk release is grey/light green (+ 5 amps) both in right hand side floor loom.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.




Posted By: howie ll
Date Posted: May 22, 2012 at 6:31 PM
Update, the BROWN / grey at the 4 pin junction at the brake switch is the brake wire when ignition is on, I was thinking of the European version.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.





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