1998 e36 323i 5dr Saloon Battery Dead Weird Alarm Sound

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  1. 1998 e36 323i 5dr Saloon Battery Dead Weird Alarm Sound 
    #1
    BMW Fanatic
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    donnav786's Car Details
    Model of Car:
    323i
    Year of Manufacture:
    1998
    Transmission Type:
    manual
    Car Body Type:
    saloon

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    Dodgy one here, went on a long drive last night, then came back, no probs with the car at all. After being inside for a bit realised I needed something from the boot, went to the car, opened the boot with the key (which undid the locks through central locking) then went to the front of the car and locked the driver door (locking all doors)

    There was no flash (from the indicators) but everything locked so i wasnt too fussed, about three/four hours later wanted to nip out for a bit and car clicks when i turn the key and then there is a very SUBTLE alarm sound coming from under the bonnet, as though someone has turned it RIGHT DOWN

    the ignition lights etc dont even turn on

    Has the battery SOMEHOW drained itself? Did i do bad?

    Someone help please been searching the forums but seems to broad a subject to pinpoint this one

    Also, what to do to get it all going again? just jump start it? PS: even the hazards are dead!
     
     

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    #2
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    Ferret's Car Details
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    330Ci
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    2001
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    Dead battery, try jumping it off another car, go for a ride to try to charge the battery. If you have a multimeter, check the voltage with the engine running - But the fact it drained so quickly, I think you'd need to look for a parasitic battery drain. I think there's a guide on the forums on how to find a 'parasitic battery drain'. If not, use Google, there's one on there.

    I think the alarm sounding is irrelevant at this stage. I think it's just because of the 'almost' completely flat battery.
     
     

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    #3
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    donnav786's Car Details
    Model of Car:
    323i
    Year of Manufacture:
    1998
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    manual
    Car Body Type:
    saloon

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    wow sounds bad, but any idea WHY it would do that in the first place? like why it would actually drain just by unlocking the wrong door, it hasnt ever done that in the past and has a near new battery in there!
     
     

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    #4
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    Ferret's Car Details
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    Like I say, search for parasitic battery drain.

    It could be a fault in the final stage resistor, for example, which leaves the interior heating fan on when you leave the car, which will drain the battery.
    Thats only an example, i'm not saying this is what is happening on your car - But the FSR is known to drain batteries.

    Or it could be that the voltage regulator on the alternator is faulty, and not charging the battery - And when you parked up the car, it had just enough to lock the doors, but when you come back a few hours later, theres nowt left in the battery.

    Get the car started, and check voltage first !
    Well, you need to, as you can't do a parasitic drain test with a dead battery !
     
     

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    #5
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    donnav786's Car Details
    Model of Car:
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    hahaha ye good point right will need to get the neighbours out for this one sigh!
     
     

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    #6
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    billywhizz1984's Car Details
    Model of Car:
    E36 323i x 3, 325TDS x 1, 320i x 2, 318is x 1
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    1999 x 2, 1998, 1997 x 2, 1996, 1995
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    The siren has a security backup battery in it so that if the main battery is cut it will continiue to sound. The backup batteries get old so they don't have much power and that is why it "squeaks". Read through my guide here for more info....

    http://www.bimmerforums.co.uk/forum/...3g-ews-t39173/
     
     

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    donnav786 (03-01-2011)

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    #7
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    donnav786's Car Details
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    battery just needed a jump to its system and all is well thanks guys!
     
     

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