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Old 11-30-2021, 05:22 PM   #1
rupace120
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Default Power windows not working- relay?

95 318ti 5 spd, 181k miles

Issue: Power windows suddenly stopped working.

They were working perfectly fine, been doing some work on the car, but nothing electrical really. Did a few searches and found it could be the module behind the glove box is bad. I replaced all the fuses (yes all 46 lol) as the car was old and new fuses are cheap so why not. Still no luck.

I was able to get them to roll-up by inserting key in driver side door and holding to lock position, so I am thinking must be a relay somewhere?

Any thoughts?

Again, both windows worked well and smooth up until recently.

Thanks!
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Old 12-01-2021, 04:29 PM   #2
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bump for more thoughts?
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Old 12-03-2021, 09:15 PM   #3
95TI slicktop
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Default Check the switch in the center console

The switch that is near the shifter that is used to operate the windows can go bad.
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Old 12-03-2021, 11:03 PM   #4
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I thought so too. But both going out at the same time? I check and niether side is getting power. Has to be further back in the circuit. Is there a relay somewhere?
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Old 12-03-2021, 11:08 PM   #5
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Default I don't know.

Seems like if you were able to get the window to go up with your key that any relay would be working. I would get a new switch and try that.
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Old 12-03-2021, 11:29 PM   #6
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I checked the voltage coming into the switches with a voltmeter and there is nothing. It seems the relay from the door lock is on a different relay from the window switches. The sunroof also stopped working at the exactly the same time as the window switches. I’ll Try a new switch, but seems unlikely both switches AND sunroof switch go bad at exactly the same time.

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Originally Posted by 95TI slicktop View Post
Seems like if you were able to get the window to go up with your key that any relay would be working. I would get a new switch and try that.
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Old 12-04-2021, 07:27 PM   #7
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It does seem unlikely that it would be a switch since all 3 switches would need to be faultly at the exact same time. I need to dig around for the wiring diagram.

Add I too did a bit of googling. Many point to the comfort relay.
https://www.bimmerforums.co.uk/threa...ir-guide.3665/
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Last edited by 1996 328ti; 12-04-2021 at 07:37 PM.
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Old 12-05-2021, 12:13 PM   #8
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Thank you. I need to work on my googling skills as a search a couple time for “comfort relay location”.

Looks like it may be the ZKE modeule as mine is 95 and comfort relay were up until 94.

The research continues, but 318ri.org helpful as always!
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Old 12-07-2021, 03:42 AM   #9
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Try the body module. That happened to me.


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Old 12-07-2021, 02:56 PM   #10
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What/where is that? Regardless I will try that. Thanks!
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Old 12-08-2021, 05:24 AM   #11
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Default Power windows not working- relay?

Google it my friend. I had it done by the repair shop so I’m not personally familiar with it or it’s location. But my symptoms were identical to yours


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Old 12-08-2021, 04:22 PM   #12
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Already researching, thanks for the direction.
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