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Thread: Alarm lights keep coming on when car is just sitting

  1. #1
    Join Date
    May 2019
    Location
    Little Rock
    Posts
    5
    My Cars
    1997 740il

    Alarm lights keep coming on when car is just sitting

    The chirp feature does not work when using the key remote. However, the lights still blink when using the remote. As a result, the alarm doesn't sound when activated.

    Now, I'm having an issue whereby when the car is just sitting with the doors locked, the lights keep blinking as if the alarm has activated. Of course, with the siren deactivated, you don't hear any noises as the lights blink but it is very agitating.

    I'm open to replacing the module, sensor or whatever controls that feature. My issues also may be with my key remote. I'd appreciate any ideas or input.

    Thank you.

    Desi

  2. #2
    Join Date
    Feb 2009
    Location
    KC North, MO, USA
    Posts
    11,170
    My Cars
    1996 740iL
    I would try a couple of things. First, double lock the car, meaning, hit the lock button twice. This turns off the interior motion detector. If it still happens, unplug the hood sensor. It is often the culprit in these cases. With it unplugged, the circuit is closed so the system will read the good as shut even when you open it.

  3. #3
    Join Date
    Aug 2020
    Location
    Germany
    Posts
    36
    My Cars
    1999 735i
    The hood sensor is a good hint. If that doesn't work, try to unplug the fuses in the trunk. That should be 38 or 39 (I'm not really sure). Better look for yourself, what the table on the battery cover says (only if you don't care about the alarm at all and just want it to shut up).
    Last edited by Capt'n; 05-18-2021 at 04:26 AM.

  4. #4
    Join Date
    Aug 2012
    Location
    Tampa, Florida
    Posts
    735
    My Cars
    2001 BMW 750iL
    Need the answer to this too as mine has been known to do this randomly. Not with any consistency at all though.


    Sent from my iPhone using Tapatalk
    Current Cars: 2001 750iL, 2001 540iT
    Previously Owned: 2003 530i, 1998 M3, 2001 740i, 2004 M3, 2000 M5

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