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E34 (1989 - 1995)

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Old 12-16-2012, 05:08 PM
TDiLisio TDiLisio is offline
Registered User
Location: Stephens City, Va
Join Date: Nov 2012
Posts: 5
Mein Auto: 1992 525i E34/M50 227K mi
Question Windows stopped working until ignition reset

Hi Folks,

I'm new to the forum, and new to BMW DIY. Hello from Stephens City, Va.

The wife recently purchased a 1992 525i with the M50 engine and 227k Miles. The guy she bought it from told her that his mechanic said everything under the car looked fine. Well... he needs to find a new mechanic. I won't go into what I found and fixed already, but obviously the mechanic wasn't familiar with thrust and control arms.

So today we were out test driving the car after replacing the thrust and control arms (which did help immensely on the shimmy at 65mph-ish. Thanks forum members)... I tried to roll down the windows at a drive thru... no windows would roll down. Playing with the switches didn't do anything. So I figured something electrical went wrong. I turned the ignition off, and restarted the engine and the windows worked...???

So we stopped and fed with the windows down, restarted the car and drove off. Was a little cold so we tried to get the windows up. Nothing. Stopped the car, turned the engine off and then turned the key to the second position (before hitting the starter) and the windows rolled up. But that was it... they wouldn't work again until the power was cycled.

Damn... I can see another weekend shot to crap working on this thing.

From sifting thru the forum, I see mention of 2 items... Fusible link and a GM. I'm kinda leaning toward the GM because the windows work when there is a power cycle (it seems). I think I would benefit from replacing both (future problems) in that the fusible link is fairly cheap (I think).

Is there a proper part name for these? or better yet a part number?... I can't seem to find a "general module" or "fusible link" on the BMW parts site in south Atlanta. I found a basic module... but at $400... I'm hoping that's not it.

Whats in the GM that fails? relays? computer chips? solder joints?

Thanks for any help you can provide.
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