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Main fuse keeps blowing

Tiny
RROONB
  • MEMBER
  • 2001 BMW 740
  • 178,000 MILES
I have a 2001 BMW 740I and I was driving and it really rained hard and I slowly went through a puddle since there was one either way I went. After that, I drove about 5 miles without any problems. The check engine light came on and started flashing. I immediately turned off the car and it wouldn't start. I have full power to everything in the car. My mechanic said he replaced the main fuse and everytime he puts the key in the ignition and starts to turn it, it blows the main fuse everytime. Any suggestions?
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Friday, July 15th, 2011 AT 8:15 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
Fashion something to temporarily replace the fuse with a pair of small jumper wires and a 12 volt light bulb. When the circuit is turned on and the short is present, the bulb will simply be full brightness. Now he can unplug things until the short is isolated and removed. When it is, the bulb will go out or dim.
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Friday, July 15th, 2011 AT 8:59 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
What number fuse is it?
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Tuesday, August 30th, 2011 AT 11:06 AM

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