Check Panel false light

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  • shawmcbigdis
    Advanced Member
    • Apr 2018
    • 164

    #1

    Check Panel false light

    the "brake light" light is on on my check panel, but there is not a problem with my brake lights. All 3 of them light up correctly when the brake is pressed.

    The light on the check panel comes on every time I start the car, it sometimes turns off after driving for a bit, but not very often.

    What the heck is going on with it? I would mind that much if it wasn't for the huge blinking "CHECK" light in the dash that makes me have to press the button. The car has done this as long as I've owned it, so I can't trace it to some change I made.

    TIA
    2002 530i - Daily
    2013 Ford Flex Ecoboost - wifes/family hauler
    1986 325es - fun car (or money pit depending on who you ask)

    My build thread - https://www.r3vlimited.com/board/sho...d.php?t=422370
  • BeirBrennerE30
    R3VLimited
    • Oct 2003
    • 2740

    #2
    Does the check light go off after you hit the brakes for the first time? If so thats normal operation. The light will always turn on when you start the car until the first time the brake lights turn on.
    e30sport.net
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    '06 M3 Competition - 6-speed
    '19 Porsche GT3 RS - 7-speed PDK
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    • shawmcbigdis
      Advanced Member
      • Apr 2018
      • 164

      #3
      Originally posted by BeirBrennerE30
      Does the check light go off after you hit the brakes for the first time? If so thats normal operation. The light will always turn on when you start the car until the first time the brake lights turn on.
      Usually it stays on, sometimes it turns off.
      2002 530i - Daily
      2013 Ford Flex Ecoboost - wifes/family hauler
      1986 325es - fun car (or money pit depending on who you ask)

      My build thread - https://www.r3vlimited.com/board/sho...d.php?t=422370

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      • nando
        Moderator
        • Nov 2003
        • 34827

        #4
        your brake light switch could be broken or misadjusted. that is the most common reason this doesn't turn off. Either that or the bulbs are wrong or the sockets are corroded.
        Build thread

        Bimmerlabs

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        • Gregs///M
          Forum Sponsor
          • Mar 2012
          • 2459

          #5
          Check panel systems typically fail because the transistors which control the LED indicators fail over time. Ive fixed a few of these.
          Owner - Bavarian Restoration
          BMW and European Electronics Repair and Restoration
          www.BavRest.com
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