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New battery but still draining over nigth help!!

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  • 06-09-2008 1:43am
    #1
    gar32
    Registered Users Posts: 1,024 ✭✭✭


    My GF has a Atoz which I have put a new battery in but it dies after say 16 to 20 hours unused. The altinator works as if used every day the car is fine. what could drain battery?? radio switch off & lights all off?

    Help please :)

    Regards Gar32:confused:


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    #2
    patrickc
    Registered Users Posts: 7,898 ✭✭✭patrickc


    gar32 wrote: »
    My GF has a Atoz which I have put a new battery in but it dies after say 16 to 20 hours unused. The altinator works as if used every day the car is fine. what could drain battery?? radio switch off & lights all off?

    Help please :)

    Regards Gar32:confused:
    have you checked the charge in the alternator? even though you say its fine...


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    #3
    Rovi
    Closed Accounts Posts: 8,570 ✭✭✭Rovi


    Something's draining current in a big way, or does the Atoz have a particularly small battery, does anyone know?

    The car isn't fitted with an aftermarket bluetooth device, is it?
    They're something of a favourite for flattening batteries these days, although it usually takes a week or so.


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    #4
    Seth Brundle
    Moderators, Politics Moderators Posts: 39,822 Mod ✭✭✭✭Seth Brundle


    If you have and can use a multimeter then by taking each fuse out when the car is off you should be able to narrow the drain to a specific area. It could be anything though (radio, light (boot?), aftermarket electrical stuff, etc.


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    #5
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    Take it to an autoelectrician. He can put a clamp around the battery lead and determine immediately the amount of current being drawn (if any) from the battery when the car is off.
    Untitled Image




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    #6
    phill106
    Registered Users Posts: 6,819 ✭✭✭phill106


    also check things like boot light, glovebox light, things plugged into cigarette light all the time making sure they all go off when car is off


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    #7
    VH
    Closed Accounts Posts: 690 ✭✭✭VH


    put an ammeter in series with the battery and see is there actually anything draining it - it's normal for a few mA - for radio backup etc

    a faulty battery out of the shop is a possibility - happened to me


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    #8
    Avns1s
    Registered Users Posts: 3,422 ✭✭✭Avns1s


    Could be the alternator rectifier. If faulty this will allow the charge back through the alternator as you describe though the alternator will charge as normal when running. The repair is a reconditioned alternator.

    You didn't cross the leads when jump starting when the last battery was on it's last legs by any chance?


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    #9
    gar32
    Registered Users Posts: 1,024 ✭✭✭gar32


    Will have a look this weekend as on shift then next few night. Great to see people trying to help :)


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