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Thread: Window switch backlight stays on, kills battery

  1. #1
    Join Date
    Aug 2005
    Location
    Iowa, USA
    Posts
    407

    Default Window switch backlight stays on, kills battery

    I have been having some sort of electrical leak that has slowly and consistently been draining my battery.

    After shutting down the car, several klicks are heard coming from the relay box that is located under the rear seat. I have always suspected those clicks as being related.

    now i noticed something that may be linked to this problem, my window switches backlights dont turn off, even after the car has been turned off overnight!! If i can trace back what turns these off, i am confident that any other appliances running off of this are on as well contributing to my leak.,

    Is this realistic?

    What should shut these lighjts off? what else is it supposed to shut off?


    -m
    1995 525i "Stefanie"

  2. #2
    Join Date
    Oct 2005
    Location
    Chicago
    Posts
    378

    Default

    Are you unlocking your car first, and then looking through the window? If so, the window switches will already be illuminated.
    _

  3. #3
    Join Date
    Aug 2005
    Location
    Iowa, USA
    Posts
    407

    Default

    Quote Originally Posted by swenpro
    Are you unlocking your car first, and then looking through the window? If so, the window switches will already be illuminated.
    nope, before even touching the car, after locking the car it will stay on too
    1995 525i "Stefanie"

  4. #4
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,160

    Default

    I will stay on up to 16 minutes.
    The ones in the rear will not be iluminated when you push the little middle button at the center switch (block), which is the child lock for windows. See owners manual.

  5. #5
    Join Date
    Aug 2005
    Location
    Iowa, USA
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    Default

    Quote Originally Posted by shogun
    I will stay on up to 16 minutes.
    The ones in the rear will not be iluminated when you push the little middle button at the center switch (block), which is the child lock for windows. See owners manual.
    What makes it shut off after 15 minutes? Mine definatly do not shut off, even after leaving the car overnight
    1995 525i "Stefanie"

  6. #6
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,160

    Default

    That is controlled by the GM -general module.
    Cannot imagine that these little bulbs draw so much power. Must be different thing too.
    Maybe the relay module has a stuck relay?

  7. #7
    Join Date
    Mar 2005
    Location
    TORONTO
    Posts
    3,011

    Default

    Mine stays on for 'a while' then shuts off. Again though I doubt they are causing enough of a drain for concern...
    :: HIDCanada.com | Illuminating Your World


  8. #8
    Join Date
    May 2004
    Location
    Japan
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    9,160

    Default

    Light should go out after 16 minutes, if not something is keeping the car awake, draining the battery.
    Did you lock the car overnight or is it in a garage?
    Because if the car is not locked, the system is still on stand-by.

  9. #9
    Join Date
    May 2004
    Location
    Japan
    Posts
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    Default

    Light should go out after 16 minutes, if not something is keeping the car awake, draining the battery.
    Did you lock the car overnight or is it in a garage?
    Because if the car is not locked, the system is still on stand-by.

  10. #10
    Join Date
    May 2004
    Location
    Japan
    Posts
    9,160

    Default

    Light should go out after 16 minutes, if not something is keeping the car awake, draining the battery.
    Did you lock the car overnight or is it in a garage?
    Because if the car is not locked, the system is still on stand-by.

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