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Window Drop Down on door opening

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Jambers
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Window Drop Down on door opening

Post by Jambers » Sat Dec 02, 2017 6:55 pm

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 » Sat Dec 02, 2017 7:17 pm

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
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Location: East Midlands UK

Re: Window Drop Down on door opening

Post by Jambers » Sat Dec 02, 2017 9:19 pm

Thanks Ron, one less thing to worry about I suppose
1989 635CSi Manual
2007 Z4M Coupe
Based in the U.K. Leicestershire

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panthercity
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Re: Window Drop Down on door opening

Post by panthercity » Tue Jan 02, 2018 5:11 pm

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 » Tue Jan 02, 2018 8:33 pm

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 » Tue Jan 02, 2018 9:06 pm

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 » Tue Jan 02, 2018 10:39 pm

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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'84 633CSi "Sylvia"; '85 635CSi "Katja";'87 325is "Odette"; '93 325is "Elvira"; '93 325is M3 clone "Ashlyn"

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