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  1. #1
    Join Date
    May 2004

    Default self activating flashers

    Self-activating flashers. An owner of a 1993 BMW may complain that the emergency flashers come on by themselves and can't be shut off with the flasher switch. BMW says this may be caused by a bum transistor in the crash control module, which you need to remove. It's a tall brown case stamped with the words "Crash-Alarm-Geber." Check the manufacturing date stamped on the side in white. The first digit of the code indicates the year ("3" means 1993). The second and third digits indicate the week of manufacture (for example, "08" means eighth week). If the unit was built before the eighth week of 1993, replace it. Use Part No. 61 35 1 384 761 for 318i, 318iS, 325i and 325iS models. Use Part No. 61 35 1 384 732 for the 525i, 530i, 540i, 740i, 740iL, 750iL, 840Ci, 850Ci and 850CSi.

    Great post Shogun! I had this problem until I read this post. I had pulled my flasher relay a week ago because they would go off for no reason. So I checked the date and part number and it turns out I had the wrong part number 732 installed instead of the correct 761. I had 4 more modules as back ups and the newest one is 93 8th week with correct 761 part number.

    and here from Horst in Germany

    How to by-pass for testing
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    Last edited by shogun; 12-31-2020 at 09:41 AM.

  2. #2
    Join Date
    May 2004


    another success story, I told Jim to check the crash alarm geber:
    copied, problem solved within 1 day after they tried for 4 years at dealer and 2 independant auto electricians etc.

    My '89 525i developed an alarm problem 4 years ago when the alarm horn was bipping intermittently whilst driving & it got worse over the next 2 years. During a routine dealer maintenance the car wouldn't idle unless (any) door was open. (Door pressure switches are original). Dealer finally suggested the front most module under the rear seat was faulty=GM. (This module operates the sunroof/electric windows etc. & all work perfectly).
    Module was tested (independently)... "no prob". I eventually replaced it with another 2nd hand one & it went good for 2 years. Now the problem is worse, & as before, only when the car is at full operating temperature, so even after a few miles it starts to bip & the engine will cut momentarily. Whilst driving it beeps on & off & hazard lights flash... not good to drive around town... or anywhere.
    ALSO, whilst still hot, & the car left parked (locked or unlocked), the alarm will suddenly go off. Opening any door/trunk will stop it, but it commences again as soon as the door is closed. Turning the key in the door lock several times will sometimes stop the alarm when the door is eventually opened. BUT SOMETIMES... the alarm will sound WHEN AN UNLOCKED DOOR IS OPENED!!! (Confused so far... yep, so am I). Otherwise, leaving a door/trunk opened until the car cools down seems to eventually stop the alarm from sounding, then it will sit for days without a murmur! Yesterday after a trip, whilst it was sounding... I removed the module & the alarm kept sounding! I've owned the car for 17 years, & there's no immobiliser that I know of. For further confusion, fitting the 'offending' module to another car it works perfectly!!! The dealer can't find a prob & 2 X INDEPENDENT AUTO ELECTRICIANS, DITTO.
    Am I up for a new module? Or could it something else?

    pull the crash alarm module in the fuse box and drive around and see what happens. The brown one, crash alarm geber is written on it, you cannot miss it


    I had a problem that my hazzard lights came on by their own, it was also this relay. And read this

    Emergency flashers blinking when opening door


    As I sit on my veranda with a cold beer, I raise the can & mutter, "Here's to the 'bimmerboard" before each sip!
    Would indeed appear to be the relay. Before starting the car I removed the relay, looked at it & replaced it, & let the car idle for 20 minutes.... no prob so far. Went for a 50 mile drive... NOT a 'beep"! Returned home & removed it again & gave all 9 pins an emery rub & went for another drive. On return opened & closed all doors, locked & unlocked the car etc...

    Now I write to say "THANKS, SHOGUN, you're a legend"!
    Dirty contact could have been the problem but I'll replace the original one anyway.

    What ever did "we" do in the 40's & 50's & before the internet. But cars weren't so complicated then either. Now I'm an "expert" on another piece of modern machinery! Confused no more.

  3. #3
    Join Date
    May 2004


    Just got this message from an 1991 E31 850i owner: after shogun gave me a link to the wiring diagrams i was able to see terminal #7 on the crash relay was grounded so that led me to the hazards switch. i pulled apart the switch and found corrosion on the pc board that was shorting out. i just cleaned off the corrosion and put the switch back together (man that was tough because i have big fingers and there are tiny parts in there lol). it fixed the problem

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