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  #1  
Old 01-22-2019, 07:35 AM
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will x5 is on a distinguished road
Weirdness after replacing window regulators..

Hi,

I just replaced the 2 front window regulators, and a rear one on my 2001 E53.. ... while out of the car i checked the old motors worked the new regulators up and down , by simply running +ve and -ve wires from a handy battery to the motor and then reversed them... the motors spun and the slides moved up and down... Installed everything back in the doors... the rear window goes up and down perfectly... the front driver window only goes down, and the front passenger window only goes up... no reverse movement ....

anyone ever hit this issue before? I am a bit stumped at how to proceed...
Would my testing of the motors that way affected them? ( cant see why as they were were working perfectly wgen testing ) ...any suggestions greatly welcomed..
cheers
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  #2  
Old 01-22-2019, 12:52 PM
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Were they working properly before replacing the regulators? I assume they were not working properly, and that is why you replaced the regulators. And now they still don't work. Any difference in the before and after function? But to confirm - you checked the window motor and regulator function after replacement by applying voltage to the motor,and everything worked properly. But now it doesn't work when using the switches? If that is the case, then my next thought would be that the relay switches in the general module 3 (aka GM 3) have gone bad. Not knowing what was working/not working to begin with, it's possible that you had both regulator and relay problems, or some combination of them both.

If you are handy with electronics and have a desoldering gun, and know which relays to order from Mouser or DigiKey, then you could try swapping out the relays yourself. I even think I saw a YouTube video (link is here) with somebody swapping out relays on a different BMW general module. Or there is/was a fellow who has a side business doing GM3 repairs. The website link is https://www.bmwgm5.com/ . Not sure if he is still doing repairs, but contact information is on that site. He repaired my relays several years ago and did a great job - took about 3 days (but that was in the US - I see that you are in Australia. I assume there are similar repair companies in Australia). Be aware while the GM3 module is out of your car some other features (most notably windshield wipers, if I recall correctly, will not work). I'm pretty sure lights all work, but I wouldn't swear to it.


Good luck.
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Last edited by sgrice; 01-22-2019 at 03:32 PM.
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Old 01-22-2019, 06:15 PM
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Addendum - the other 2 failure possibilities that I can think of would be the switches themselves or the wiring between the switches and the GM3 module. Somebody more clever than I could probably look at the wiring diagram and use a voltmeter to check the switch function, but I don't know how to do that. I'd probably be reduced to going to a salvage yard (or ebay) to get a switch.

A quick perusal of youtube did show one video where the side view mirror motor was actually the culprit - somehow the mirror motor was sending current into the general module that was causing window malfunction. Don't think that applies to you, but it does demonstrate the complexity of the whole system.

And did you disconnect any other wiring connections? If you did, did you make sure the anti-pinch sensor wire was hooked back up? It's the small 2 wire component that is embedded in the window trim. I'm actually not sure what happens if that isn't hooked up, but my suspicion is that the window won't go up. Not sure if it would cause some sort of auto down function, or if it just prevents the window from going up any more.

Not sure what is the more likely fault - the switches, or a relay(s) in the GM3. Perhaps someone with more knowledge than I have can look at the wiring diagram on newtis.info (link to wiring diagrams for a 2005 e53 is here - your model may be different - put in your VIN and see) and figure out which wires to backprobe to test the switches. My money is on the GM3 relay(s), but that's a guess.
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2010 e70 35d- now driven by son #2
2005 e53 3.0 - now driven by son #1
2018 G01 M40i - now driven by me
2008 ML320 CDI - driven by wife

Last edited by sgrice; 01-22-2019 at 06:29 PM.
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  #4  
Old 01-22-2019, 07:18 PM
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will x5 is on a distinguished road
Thanks so much for the info.. gives me food for thought ,,, hopefully some one else may weigh in on my next question...

when testing motor before removing, i put +ve and -ve onto the motor terminals.... that seemed to short out the circuit... ie wires hot, no result.. changing -ve to be on the motor casing, and swapping +ve onto either terminal, the motor spun both ways... however when out of the car, i had to put +ve and -ve directly onto the motor terminals ( and reverse) to make motor work,,,, putting -ve onto casing didnt seem to work now.. I have basic idea re circuits,, but this bit has me puzzled ... I may have to pull it all out again #^&#$ and triple check my results in case they sound erroneous?
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Old 01-22-2019, 07:55 PM
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It shouldn't have shorted the circuit. When I was parting out a x5 I used a portable battery jumper to roll the all my windows up/down using spade terminals plugged in directly to the motor and just switching polarities to move them up/down.

The terminals are very close to each other on the motor so if I wasn't careful it would spark but it wouldn't make them stop functioning. Didn't even blow a fuse.

I would check your window switches.
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