2003 bmw 745i need wiring info

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Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115858
Printed Date: May 02, 2024 at 1:02 PM

Topic: 2003 bmw 745i need wiring info

Posted By: stevetolentino
Subject: 2003 bmw 745i need wiring info
Date Posted: August 23, 2009 at 7:14 PM

Someone please help me find info on the wiring for a 2003 BMW 745i, all I really need is info on 12v constant and the starter wire colors.

Thanks in advance.

Replies:

Posted By: kola7126
Date Posted: August 26, 2009 at 10:17 AM

BMW MOD. SERIE 7 YEAR 03

POWER SUPPLY +30: connect directly to the big wire coming out of the battery terminal. It is suggested such connection

as some connections with fixed supply are deactivated by the electronic system of the vehicle after about

30 min. from the extinction of the switchboard.

STARTER +50: 2mm2 BLACK wire located in the wiring harness coming out of the MOTRONIC central

placed in the lower part of the antipollen filter, in the engine compartment.

Posted By: howie ll
Date Posted: August 26, 2009 at 11:39 AM

Kola's absolutely right, in fact I would even ignore the ignition RED / green and RED / blue because we've seen some of these time out. Remember what I posted about that on your 6 series request. In fact, all the Germans, I would now suggest fuse box and/or battery.

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