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Thread: Window Drop Issue

  1. #1
    Join Date
    Aug 2016
    Location
    Mclean, VA
    Posts
    324
    My Cars
    1992 850i, 2015 M5

    Window Drop Issue

    Hi All,

    I have a unique issue that I can't find any previous posts on.
    Drivers side window drops 1/2" properly from both inside and outside handles but after a few seconds of the door being open, window goes back up. It appears to think the door is still closed.

    Window up/down reset did not fix the problem.

    What makes the window stay down when the door is open?

    Any thoughts?

  2. #2
    Join Date
    Jul 2020
    Location
    Georgia
    Posts
    48
    My Cars
    91 850i

  3. #3
    Join Date
    Feb 2010
    Location
    Hampshire UK
    Posts
    8,891
    My Cars
    99 840ci Sport Indv
    Yes, the reason the window goes back up is the 'door open' signal is missing (I remove the connection to get my window to roll up in an emergency in the video) - the signal comes from a microswitch that I show in the video.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  4. #4
    Join Date
    Aug 2016
    Location
    Mclean, VA
    Posts
    324
    My Cars
    1992 850i, 2015 M5
    Quote Originally Posted by Timm View Post
    Yes, the reason the window goes back up is the 'door open' signal is missing (I remove the connection to get my window to roll up in an emergency in the video) - the signal comes from a microswitch that I show in the video.
    Brilliant. I like how easy you make it look.
    Any chance you have the micros witch part #?
    I'm having a hard time identifying it on RealOEM.
    Thanks for your time/expertise!

    Sent from my SM-G965U using Tapatalk

  5. #5
    Join Date
    Feb 2010
    Location
    Hampshire UK
    Posts
    8,891
    My Cars
    99 840ci Sport Indv
    Well, not a microswitch for the 'door is closed' signal - but part of the door module: https://www.meeknet.co.uk/e31/e31_94.pdf#page=299
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


    My BMW Repair YouTube Channel
    My Current 840ci Sport Individual
    My Current 650ci Sport Individual
    My E31 Repair and Information Website
    My E38 Repair and Information Website
    My E63/E64 Repair and Information Website

    Chase - Heroes to a generation

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