Window Drop Down on door opening

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Jambers
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Window Drop Down on door opening

Post by Jambers »

This might be a totally dumb question, but given that the door glass rides up under a lip on the door seal, are the e24's supposed to have the drop down feature you get on, say, an e86 coupe? I know a lot BMW's have this, but those tend to be the newer variants.
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ron
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Re: Window Drop Down on door opening

Post by ron »

Jambers wrote: Sat Dec 02, 2017 6:55 pm are the e24's supposed to have the drop down feature you get on, say, an e86 coupe?
Not on the E24.
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Jambers
Posts: 62
Joined: Mon Aug 28, 2017 9:41 pm
Location: East Midlands UK

Re: Window Drop Down on door opening

Post by Jambers »

Thanks Ron, one less thing to worry about I suppose
Current cars:
1989 635CSi Manual
2007 Z4M Coupe
G31 530d M Sport
F21 118i M Sport
Based in the U.K. Leicestershire
Previously : F30, E60, E21, E30, E12, E28
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panthercity
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Re: Window Drop Down on door opening

Post by panthercity »

Any insight into how difficult it would be to add this feature to an E24?
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sharkfan
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Re: Window Drop Down on door opening

Post by sharkfan »

I suspect use the heated door lock switch to engage a pcb circuit or short time relay (circa 0.25 secs) to drop the window a fraction and then use a contact on the the interior light relay going off to engage a similar pcb/short term hold relay to push the window back up for just over that length of time, say about 0.5 secs.
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panthercity
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Re: Window Drop Down on door opening

Post by panthercity »

Does this feature typically have any protection against pinching a persons fingers?
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hornhospital
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Re: Window Drop Down on door opening

Post by hornhospital »

The system on the E36 coupe and cabrio (and presumably the sedan, but they don't have the window drop/raise feature) have a pinch protection circuit, but I don't know how it works. I assume it's tied to the amperage draw on the window motor.
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