2001 E46 320d - Battery drain

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  1. 2001 E46 320d - Battery drain [Solved] 
    #1
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    I recently replaced a battery after the car was struggling to start and now the problem had reappeared only a month after replacing the battery.

    Just done a drain test following the steps by Boostist here and the lamp was indeed bright. After pulling all the fuses, only fuse 49 (Central locking system) made the light go dim and the alarm sounded, once reinserted the alarm stopped and the lamp got brighter.

    Any one got an idea?
    Last edited by koola; 27-09-2009 at 18:35.
     
     

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    #2
    RYM
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    Check the wiring concealed within the rubber sheath that runs between the boot lid and car as the wires break and make contact with other wires due to constant flexing
     
     

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    Dr of BMW gildersol's Avatar
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    I believe this fuse also protects the aerial amplifier so you could check that as well. Disconnect it and see if that helps.
    Last edited by gildersol; 14-09-2009 at 22:50.
     
     

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    Quote Originally Posted by A20 RYM View Post
    Check the wiring concealed within the rubber sheath that runs between the boot lid and car as the wires break and make contact with other wires due to constant flexing
    Cheers, have checked and all the wires are well insulated. I'm still not rules this out though.
    Quote Originally Posted by gildersol View Post
    I believe this fuse also protects the aerial amplifier so you could check that as well. Disconnect it and see if that helps.
    Gonna try that tonight.

    I also hooked up a DMM and got 0.89A I'me pulling the fuses again and see if any reduce the current drain. Failing this, will have to take it into the garage
     
     

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    So I pulled all the fuses with the car in sleep mode and none made any difference. It's booked into the garage for Friday, so I hope their auto electrician can find it.

    Just when I was gonna have it mapped, this happens, typical.
     
     

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    The indy can't find the fault, so it's off to the stealer next weekend :(

    On the bright side, I've bagged a full set of powerflex bushes for £164 delivered.
     
     

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    #7
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    Didn't go to the stealer, but to a local garage who quickly diagnosed the fault. It was the starter motor itself. That's being replaced next week
     
     

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