2003 E46 320d - Battery Drain

Notices
 

Thread: 2003 E46 320d - Battery Drain

Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. 2003 E46 320d - Battery Drain 
    #1
    Bimmer Fan
    Car Details
    Stoffy1's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1993
    Transmission Type:
    Auto
    Car Body Type:
    Saloon

    Join Date
    May 2008
    Location
    Sleaford
    Posts
    19
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Firstly I apoligise for starting a new thread on this, but most appear to have found the problem.
    So I have a parasitic drain of 0.5A.
    I have pulled all fuses, all the relays I can find and the FSR which is a common fault. Still have the drain.

    Anyone ideas where I go next, short of checking the entire wiring system. A friend mentioned the Alternator diodes can play up and cause a draw but not easy to get to.

    Please help!
     
     

  2. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  3.  
    #2
    BMW Guru
    Car Details
    Ronnie's Car Details
    Model of Car:
    See above
    Year of Manufacture:
    Never too old, never too new
    Transmission Type:
    Always manual
    Car Body Type:
    Usually 5 doors
    Ronnie's Avatar
    Join Date
    Dec 2007
    Location
    Bournemouth, Dorset.
    Posts
    20,398
    Thanks
    6,198
    Thanked 7,052 Times in 5,322 Posts
    The starter motor and Alternator are next to unplug,
     
     

  4.  
    #3
    Bimmer Fan
    Car Details
    Stoffy1's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1993
    Transmission Type:
    Auto
    Car Body Type:
    Saloon

    Join Date
    May 2008
    Location
    Sleaford
    Posts
    19
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Cheers Ronnie. Will get to it this week and report back
     
     

  5. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  6.  
    #4
    Bimmer Fan
    Car Details
    Stoffy1's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1993
    Transmission Type:
    Auto
    Car Body Type:
    Saloon

    Join Date
    May 2008
    Location
    Sleaford
    Posts
    19
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Disconnected alternator drain gone! Dont have wiring diagram, but does this mean that it is the alt or could it still be starter depending on the system wiring?
     
     

  7.  
    #5
    BMW Guru
    Car Details
    Ronnie's Car Details
    Model of Car:
    See above
    Year of Manufacture:
    Never too old, never too new
    Transmission Type:
    Always manual
    Car Body Type:
    Usually 5 doors
    Ronnie's Avatar
    Join Date
    Dec 2007
    Location
    Bournemouth, Dorset.
    Posts
    20,398
    Thanks
    6,198
    Thanked 7,052 Times in 5,322 Posts
    Then it sounds like the alternator is at fault then, see here for wiring,

    http://www.realoem.com/bmw/showparts...67&hg=12&fg=29
     
     

  8.  
    #6
    Bimmer Fan
    Car Details
    Stoffy1's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1993
    Transmission Type:
    Auto
    Car Body Type:
    Saloon

    Join Date
    May 2008
    Location
    Sleaford
    Posts
    19
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Does anyone know where I can get alternator parts? Would like to attempt to fix alt rather than splash out for a new or reconditioned one! Gonna change the diode pack if possible
     
     

  9.  
    #7
    Bimmer Fan
    Car Details
    4EST's Car Details
    Model of Car:
    E90 318d LCI
    Year of Manufacture:
    2009
    Transmission Type:
    manual
    Car Body Type:
    Saloon

    Join Date
    Oct 2010
    Location
    Brasov, Romania
    Posts
    11
    Thanks
    0
    Thanked 1 Time in 1 Post
    I might have the same problem: I have a parasitic drain of 0.4A
    Yesterday I disconnected one by one all the fuses (in the glove box, are there any other left?) and the drain was still there
    Somehow it wasn't completely stable 0.4A - it varied form 0.35 to 0.4 very slowly

    So I guess I have to think about disconnecting the alternator and starter. Is it a difficult job?, haven't tried locating them yet....
     
     

  10.  
    #8
    Moderator
    Car Details
    thepurpleblob's Car Details
    Model of Car:
    840Ci Sport, 330Ci Clubsport, X3 2.0d SE
    Year of Manufacture:
    1999, 2003, 2004
    Transmission Type:
    Automatic, Automatic, Manual
    Car Body Type:
    Coupe, Coupe, SAV
    thepurpleblob's Avatar
    Join Date
    Aug 2010
    Location
    Carluke, Lanarkshire (nr. Glasgow)
    Posts
    1,963
    Images
    1
    Thanks
    104
    Thanked 448 Times in 407 Posts
    Quote Originally Posted by Stoffy1 View Post
    Does anyone know where I can get alternator parts? Would like to attempt to fix alt rather than splash out for a new or reconditioned one! Gonna change the diode pack if possible
    Used to do this a lot. Diodes are pretty boring things. If you can the diode pack apart you can just replace them with something vaguely equivalent (if all else fails, the same size will have to do). You have to consider this a bodge - it might bugger the thing altogether or may make no difference (you need to be able to solder properly too). A windings breakdown (to earth) could have a similar affect too.

    There are people about who recondition alternators. Might be worth asking for advice.
     
     

  11. Fixxed baby 
    #9
    Bimmer Fan
    Car Details
    Stoffy1's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1993
    Transmission Type:
    Auto
    Car Body Type:
    Saloon

    Join Date
    May 2008
    Location
    Sleaford
    Posts
    19
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Problem finally solved a month or so back. Got looking into it properly, found the lead I took off the alternator was the supply to the pre heat unit. Took said lead out off car altogether now no drain woo hoo! Running without preheat but shouldn't be a problem, I'm reliably informed its not really needed.
     
     

  12.  
    #10
    BMW Maestro
    Car Details
    Hassan's Car Details
    Model of Car:
    350z GT / Cooper
    Year of Manufacture:
    Dec 2004 / 2001
    Transmission Type:
    Manual / Manual
    Car Body Type:
    Coupe / Hatchback
    Hassan's Avatar
    Join Date
    Apr 2009
    Location
    England, East Midlands
    Posts
    947
    Thanks
    1,181
    Thanked 132 Times in 117 Posts
    I had a parasitic drain too. Gave it to BMW Sytner who confirmed it needed a new ZKE module (body electrics control unit), cost me £450 to replace...

    Get rich or die tryin'...
    BFUK Nightshift Crew member
     
     

Page 1 of 2 12 LastLast
Tags for this Thread

View Tag Cloud

Posting Permissions
  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts