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General E46 Forum
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Old 08-26-2010, 12:13 PM   #1
lilpymp
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power windows problem

my 1999 328i's rear passenger window goes up and down on it's own switch but only goes up on the main switch. how can i solve this? trying to search the forum but 20 pages of irrelevant posts come up. please help.

and also, can somebody post a picture of the relays, where it's located and which ones are which?

thanks!!!
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Old 08-26-2010, 01:26 PM   #2
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Quote:
Originally Posted by lilpymp View Post
my 1999 328i's rear passenger window goes up and down on it's own switch but only goes up on the main switch. how can i solve this? trying to search the forum but 20 pages of irrelevant posts come up. please help.

and also, can somebody post a picture of the relays, where it's located and which ones are which?

thanks!!!
For location and which is which look at the third picture down on this page.
http://www.bmwgm5.com/GM5_FW_Relays.htm
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Old 08-26-2010, 02:24 PM   #3
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thanks. is there anyway i could see how the relays look like from behind the glove box?
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Old 08-27-2010, 02:36 PM   #4
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no takers???
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Old 08-27-2010, 03:20 PM   #5
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Eh? If you want to see the relays scottjoh is talking about, you'll have to remove the whole GM5 module and open it up (don't mess with $hit inside unless you know what you're doing). It's behind the glovebox, which you'll have to remove to access it. Scottjoh has a great site (the one he linked to) with pics and removal guides if you're interested.
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Old 08-27-2010, 03:23 PM   #6
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Also, I don't really know, but it sounds like your switch might just be faulty (bad/worn contacts, etc.)
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Old 08-27-2010, 05:47 PM   #7
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i had a hunch that it was the switch too but it makes a clicking sound to the window motor at the back when i push it. it just doesn't go down but it goes up from the main switch. it goes up and down on it's own switch. you think it's a switch?
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Old 08-27-2010, 05:55 PM   #8
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btw, how do you know that a relay is bad? i thought it was those plug and play relays but it says on the link that it should be soldered.
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Old 08-27-2010, 08:54 PM   #9
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PM or email Scott above, he's very knowledgeable about window relay/GM5 issues.
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Old 08-28-2010, 06:40 PM   #10
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If you can control the window motor up and down with the local switch then it is not the relay! It still could be the GM5 however.

I have seen a couple GM5's that have had bad inputs from the windows switches, but, that is pretty rare. I didn't believe it the first time I was contacted. He said he replaced the switch and the problem presisted and wanted the relays replaced. Symptom did not sound like a relay, but, I told him to send it in and I'll take a look. Sure enough two windows switch inputs were bad. One window would not go up and another window would not go down when tested on my known good test bed.
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Old 09-01-2010, 11:51 AM   #11
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thanks guys!
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