» » »


Ask Your Question

2001 BMW X5 Question: I have a constant drain on my battery.



, Port Huron, MI, January 31, 2011, 13:16

Occurs, consistently. I have had it checked by dealership. They say it is the blower fan. My mechanic unplugged blower fan and there still was a drain. Getting frustrated.

1 Answer
Flag This
  • Answer #1

    overbys from Overbys Inc, January 31, 2011, 17:06

    it is not the blower fan; most likely the blower resistor
    which is sometimes referred to as a final stage. it has
    access directly to the battery at all times, even with the key removed. your mechanic should know this if he
    bothered looking at the wiring diagram. there are other things that can cause a parasitic draw, but this is the
    most common one on all BMW's.

    Flag This
  • Reply

    , January 31, 2011, 23:15

    thank-you for your response. that makes the most sense out of everything that i have heard. i will follow up on this and appreciate your help.

    Flag This