What can be causing my blower motor to not work?

Tiny
GMB1124
  • MEMBER
  • 2000 BMW 328
  • 180,000 MILES
I have a 2000 Bmw 328i (e46) and my blower motor isn't working. The head unit is working and I''ve replaced the FSU (blower motor resistor) and the blower motor itself. The fuses are good and there is power to the blower motor plug. I've also direct wired the blower motor and it works just fine. I'm absolutely stumped! Help!
Saturday, June 30th, 2012 AT 8:14 PM

8 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
With the power plugged in to the motor and the car system on, back probe the blower motor plug and check for power and earth, you may have a problem in the plug it self or an earth problem, start here.
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Sunday, July 1st, 2012 AT 5:10 AM
Tiny
GMB1124
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What do you mean check for earth?
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Sunday, July 1st, 2012 AT 1:55 PM
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
He was referring to a grounding problem. If the motor doesn't have a solid grounding wire it won't work properly.
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Tuesday, July 3rd, 2012 AT 4:58 PM
Tiny
MHPAUTOS
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I will find the correct wiring schematic and post you soon, the plug into the motor will have power and earth as mike said, if the earth is faulty this will also cause the motor to fail.
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Wednesday, July 4th, 2012 AT 8:52 AM
Tiny
MHPAUTOS
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Have a look at the pic, see if thats any assistance, I will see if I can contact a BMW tech for more detailed information, I am having trouble finding exactly what I want in Mitchell 1.
Image (Click to make bigger)
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Wednesday, July 4th, 2012 AT 9:03 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
Let me know what you find out here, if no joy, it could be conductor, connector, component. Check the harness.
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Wednesday, July 4th, 2012 AT 10:40 PM
Tiny
GMB1124
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Thank you for the replies. I was able to see that the fuse panel had a bad female connector and replaced it and it's working fine now.
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Thursday, July 5th, 2012 AT 1:16 AM
Tiny
MHPAUTOS
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Thats good to hear, thanks for the feed back.
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Thursday, July 5th, 2012 AT 6:51 AM

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