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Thread: Parasitic Draw - Fuse No. 49 & 52

  1. #1
    Join Date
    Sep 2017
    Location
    Charlotte, NC, USA
    Posts
    1
    My Cars
    2001 BMW 325i

    Parasitic Draw - Fuse No. 49 & 52

    I believe that my 2001 325i is experiencing a parasitic draw. I can't get the car to start after 3-5 days without use, and have replaced the battery/tested the alternator - both of which are good.


    After letting the car enter sleep mode, I disconnected the negative cable from the battery and recorded a 2.60 amp draw. I began pulling fuses individually and found that fuse no. 49 and 52 both dropped the current draw to 0.28 amps.


    Fuse No. 49 and 52 are involved with the Central Locking System (along with fuse no. 60), Interior Lights, and Windscreen Washer System (along with fuse no. 59). I've made sure that the interior trunk and glove compartment lights turn off when closed, so this is not the problem.


    At this point I am stuck. What steps can I take to try to find and solve this issue? Any help will be greatly appreciated!


    -TM

  2. #2
    Join Date
    Jun 2018
    Location
    Portland
    Posts
    1
    My Cars
    2003 bmw 330ci
    I'm having the same problem on a customers car but their car is only affected by fuse 49. I think what I'll do next is plug the fuse back in and now disconnect the controls to the windows, sunroof, overhead interior lights control, each one on the circuit individually to see if I can narrow down which one is the suspect.

  3. #3
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,934
    My Cars
    2018 BMW M240i
    Does the car have heated locks?

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