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Windows won't go down

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Trish331
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Windows won't go down

Post by Trish331 » Fri Nov 17, 2023 10:01 am

Hi,

My windows on my '66 Z4 have stopped working using the buttons on the door. They go up and down when the roof is operated. This happened last night.

Kept messing with the buttons. Eventually heard a 'click' and the windows worked. Went to try them this morning and they won't work again.
I have looked in the manual and it says to press the switch 'beyond the resistance point'. I have tried everything and they still won't work. :headbang:

Any help would be appreciated.
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TOMGREEN413
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Windows won't go down

Post by TOMGREEN413 » Sun Nov 19, 2023 1:24 am

Have you tried checking the fuses for the door windows in case they are o a different circuit to the roof switch? Hopefully one of the forum geniuses will be along shortly to assist.
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Trish331
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Windows won't go down

Post by Trish331 » Sun Nov 19, 2023 10:48 am

Thanks. That's on the agenda for today.
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Windows won't go down

Post by Trish331 » Sun Nov 19, 2023 4:07 pm

Well, all the fuses have been checked. Not a fuse. The passenger window goes down and up using the passenger door switch. The electric wing mirrors both work. Could it be the switch controls on the drivers door?
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patriot66
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Windows won't go down

Post by patriot66 » Sun Nov 19, 2023 6:35 pm

Have a look at this about window reset :thumbsup:
viewtopic.php?t=196
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Windows won't go down

Post by enuff_zed » Sun Nov 19, 2023 6:39 pm

patriot66 wrote: ↑Sun Nov 19, 2023 6:35 pm Have a look at this about window reset :thumbsup:
viewtopic.php?t=196
Not sure it's the same on the E89 is it?
The fact it worked again after some 'messing' makes me think the switch is iffy.
Any chance water has got into it?
I suspect the only way to prove it is to slave another switch in.
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Windows won't go down

Post by patriot66 » Sun Nov 19, 2023 6:50 pm

enuff_zed wrote: ↑Sun Nov 19, 2023 6:39 pm
patriot66 wrote: ↑Sun Nov 19, 2023 6:35 pm Have a look at this about window reset :thumbsup:
viewtopic.php?t=196
Not sure it's the same on the E89 is it?
The fact it worked again after some 'messing' makes me think the switch is iffy.
Any chance water has got into it?
I suspect the only way to prove it is to slave another switch in.
Oh yes, E89 :roll:
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Windows won't go down

Post by B21 » Sun Nov 19, 2023 6:55 pm

Usually it’s the microprocessor in the door switch assembly that’s ‘off’..sometimes water has got into it and if dried out normal service returns 2-3 days later..that happened on my 20i…sometimes it goes ‘sarf never to return ..in which case it’s a replacement switch unit..
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Windows won't go down

Post by MikeyH » Sun Nov 19, 2023 7:14 pm

On my E85 the drivers switch would only make the window go down no matter which way I pressed it. Turned out to be a dirty contact.
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B21
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Windows won't go down

Post by B21 » Sun Nov 19, 2023 8:43 pm

MikeyH wrote: ↑Sun Nov 19, 2023 7:14 pm On my E85 the drivers switch would only make the window go down no matter which way I pressed it. Turned out to be a dirty contact.
E89 doesn’t use a traditional switch..all commands are routed via a microcontroller talking on a data bus..the fact that the windows goes down with the roof is the clue..plus all 5 switches on the controller don’t work..if it was a ‘real’ switch some of them would work.. :thumbsup:
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
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Windows won't go down

Post by TOMGREEN413 » Sun Nov 19, 2023 9:34 pm

Why does everything have to be so complicated :thumbsdown:
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Windows won't go down

Post by B21 » Sun Nov 19, 2023 9:37 pm

TOMGREEN413 wrote: ↑Sun Nov 19, 2023 9:34 pm Why does everything have to be so complicated :thumbsdown:
Yup I don’t know..I was truly gobsmacked at how crazy automotive electronics had become ..bearing in mind that the G29 takes it to a new level that I can’t even get my head around…
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
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Windows won't go down

Post by MikeyH » Sun Nov 19, 2023 11:29 pm

It’s to stop non BMW dealers doing it on the cheap :headbang:
Now, Sterling grey Z4 2.2 with cup holders, stubby aerial and sport seats. Roadsters ‘cause they’re great with the roof down.
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Trish331
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Windows won't go down

Post by Trish331 » Mon Nov 20, 2023 9:35 am

Unfortunately, I'm not able to do a reset as the windows will not go up or down with the switch.
Also having problems trying to source a new switch panel. All the ones showing have the wing mirror button, but mine doesn't. Would this matter??
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B21
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Windows won't go down

Post by B21 » Mon Nov 20, 2023 9:40 am

Trish331 wrote: ↑Mon Nov 20, 2023 9:35 am Unfortunately, I'm not able to do a reset as the windows will not go up or down with the switch.
Also having problems trying to source a new switch panel. All the ones showing have the wing mirror button, but mine doesn't. Would this matter??
Your car doesn’t have electrically adjustable mirrors?
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
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