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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 08-05-2011, 01:08 PM   #1 (permalink)
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2004 325i Weirdest Problem Ever (Electrical)

Came home from long drive and window locks started going mad unlocking and locking just before home.

I figured some water got into the lock button (stupid design and location). Locks go crazy like machine gun if hit the hazard button. I switch car off to deal with car in morning however there is weird bug.

The background lights for which gear you are in won't switch off, and I hear a slight buzzing sound of electricity being on. So I start pulling fuses.The fuse plan is convoluted and absolutely useless in locating which fuse. I pulled out 20 fuses before it went off finally.

I went to sleep and woke up to having to reverse lookup the fuses and figure out which one my car needed and didn't need. I was tired or else I would have taken a pic. The fuse map is useless especially for putting it back in, but I figured it out in 10 minutes.

The bad part is I still didn't figure out which fuse actually switches off the gear lights. I think it is more than one because I checked after each fuse, and pulling out the fuse that turned it on didn't turn it off. The lock button now works perfectly, but the gear lights won't shut off. At first I thought it was just glow in the dark, but that is not the case. the same faint electrical sound is still there with car off.

Here are the pics of what I am talking about:

Gear lights on.

Note the disconnected right cable, this was disconnected when I lifted it up, plugging it in cause a further weird error seen in the third picture.

Yep, another light stays on switched off, this one is the one that tells you what gear you are currently in, not just all the gears.

AFI how to solve this?

Last edited by rssdg; 08-05-2011 at 01:12 PM.
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Old 08-06-2011, 01:08 PM   #2 (permalink)
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I'm absolutely going insane. The car enters sleep mode but these lights are still on. It doesn't make any sense.

I took to BMW dealership, and they are huge idiots and had no idea. I took to another mechanic who didn't get it either.
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Old 06-12-2012, 01:35 PM   #3 (permalink)
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Did you get this resolved.... I had a simular issue ended up being the positive batt cable, sounds weird but the batt cable has a explosive charge in it at the terminal. What this does is if in a accedent where the air bag is deployed this brakes the connection so that there are no sparks. But the issue is when there is mosture the resistance gets off and all of the control moduals start going biserk .... cable is $400
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