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E90/E91/E92/E93 (2006 - 2013)
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Old 09-04-2013, 09:01 PM
slowturtle slowturtle is offline
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Location: NOVA
Join Date: Sep 2013
Posts: 2
Mein Auto: 328i, 335i
I need some help troubleshooting this problem

So my '09 328i coupe had the window anti trap warning light come on (looks like this:link), and my passenger-side power window stopped working. If you press any of the window buttons (both sides, either in manual or automatic operation) nothing happens. If I hold the unlock button on the fob, the drivers window rolls down but not the passenger. Also, the function that rolls up the window on the coupe when you close the door (to seal it) no longer works. Here's what I've done so far to try and fix it myself:

- checked the fuses
- disconnected the battery for several hours
- tried the power window initialization, but the window does not move at all
- took it to the dealer to have it diagnosed, and they told me that the window motor was bad
- tested the regulator, it is working fine (according to the dealer)
- swapped the window motor for a new one (did this twice, in case I had a faulty replacement the first time...these don't need to be coded, do they?!)
- pulled the motor off of the regulator but left it plugged into the harness and tried the switch, but the motor does not move (no power getting to the motor???)

So now I'm thinking that the motor may not be getting power for some reason. Does anyone have any ideas what else I can check? If I can't figure anything else out I'll go back to the dealer, but I'm really trying to dodge this since I'm trying not to spend too much $$$ (which is why I swapped the power window motor myself).

Any help would be GREATLY appreciated!!!
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Old 09-05-2013, 03:24 AM
Phil325i's Avatar
Phil325i Phil325i is offline
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Location: UK
Join Date: May 2012
Posts: 301
Mein Auto: 325i E92 Coupe
This might help:

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Old 09-05-2013, 04:45 AM
Officially Welcomed to the 'Fest
Location: San Francisco
Join Date: Aug 2009
Posts: 10,410
Mein Auto: 2009 E93 N54
Originally Posted by slowturtle View Post
no power getting to the motor???

You should measure voltage to the motor w/multimeter. None? switch to resistance [ohms] and check wiring continuity. Good? Check ground.

Continuity + ground good? Move upstream.

Got voltage, but not right? Don your thinking cap.

Name:  Think 04.gif
Views: 132
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You get the idea - test until you locate the problem. What, did BMW shoot from the hip, not verifying their diagnosis? Not uncommon....!


Last edited by CALWATERBOY; 09-05-2013 at 04:52 AM.
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Old 09-06-2013, 07:08 AM
fdriller9 fdriller9 is offline
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Location: NJ/Philly
Join Date: Oct 2006
Posts: 7,890
Mein Auto: '06 AW 330xi
I think you can have the FRM reset and re-initialize window start and stop positions.

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