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E34 (1989 - 1995)

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Old 07-14-2016, 07:58 PM
Rhyseeroo Rhyseeroo is offline
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Mein Auto:
Help please! Anybody have any experiences with shorts in wiring? 1995 525i

I have a 1995 525i that recently had the passenger front parking light and passenger tail light and passenger brake light go out. Thought I checked all the fuses but go to replace the fuse that controls those lights, BAM! Miracle! It WORKS! ...For three seconds until I see the fuse blow, thought it was a fluke so I put in another one, same deal. I suppose I hope this is a common issue because will all of the distance and space from the rear taillight assembly to the fuse box under the engine, my ass isn't finding it. Does anyone know of the first place I should check?
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Old 07-15-2016, 08:04 AM
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TheEinstein TheEinstein is online now
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Location: Denver, CO
Join Date: Mar 2014
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Mein Auto: E34 540i
Best places to start are the fuse box, behind the panel of fuses. I'm pretty sure I've heard of some melting and fusing of wires in that area. But what is most suspect to me is the odd lights here or there that are out. So given that second piece, I'd start by pulling the trim off and having a very thorough look at the trunk lid harness, and finally at all wiring leading up to each of those lamp sockets in question. For that matter, inside the sockets too. Replace all, assuming you might not have already, lamps in those sockets too if for no reason than to rule the sockets and bulbs out. Honestly, that's if you don't find an issue in the trunk lid harness first IMO.
1995 E34 540ia
160,000 Miles
VIN# ...GF32404
Hellrot Red


My Basic Repair History (Edited 1/27/2015)

Ongoing comparison between two E34 540ia's

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Last edited by TheEinstein; 07-15-2016 at 08:08 AM. Reason: For that matter...
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Old 07-15-2016, 09:53 AM
Mr._Graybeard Mr._Graybeard is offline
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Mein Auto: '95 540i, E30, E24
+1 on the wiring at the trunk hinge.
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Old 07-16-2016, 10:28 AM
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thumper600 thumper600 is offline
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Mein Auto: '95 540i M-Sport, 01 M5
This may sound weird but it works, there is a tool called a toner that you hook up to a wire and on the other end is a sounding device. As soon as the circuit completes there's an audible tone. This way you'll know what color wire your looking for when you go looking through the kinks and bends of the routing of the wiring loom
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Old 07-16-2016, 12:43 PM
ThoreauHD ThoreauHD is offline
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Mein Auto: 02/1994 530i 8cylinder
Trunk wiring loom. They all crack and make contact with metal, shorting out every damned thing sporadically.
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