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Tiny
CALVA
  • MEMBER
  • 2001 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
Ecm b fuse keeps blowing on my 2001 suburban, I put new battery and fuel pump and I dont know.
Thursday, January 13th, 2011 AT 8:43 PM

9 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Did this start after the fuel pump was replaced? Does the fuse blow instantly when the key is turned on?
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Thursday, January 13th, 2011 AT 9:25 PM
Tiny
CALVA
  • MEMBER
  • 6 POSTS
My wife was driving and it just died out and didnt want to start no more. So I replaced the fuel pump but now the ecm b keeps blowing every time you go to turn it over.
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Friday, January 14th, 2011 AT 12:05 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The ECMB fuse powers the fuel pump so I suspect something is wrong with the installation. You may have the power wire contacting the housing in the pump module and that mighty dangerous. Try unplugging the fuel tank harness and see if the fuse stops blowing. If so, drop the tank again.
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Friday, January 14th, 2011 AT 12:11 AM
Tiny
CALVA
  • MEMBER
  • 6 POSTS
Pulled the fuel pump relay turned it over and it didnt blow the ecm b
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Friday, January 14th, 2011 AT 12:27 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I said disconnect the harness at the tank. Pulling the relay doesn't tell you if the relay or the wiring going back is good or not.
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Friday, January 14th, 2011 AT 12:30 AM
Tiny
CALVA
  • MEMBER
  • 6 POSTS
Ok thank you I'll let you know what happened
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Friday, January 14th, 2011 AT 12:33 AM
Tiny
CALVA
  • MEMBER
  • 6 POSTS
I started the truck after disconnecting the fuel tank harness and it didnt blow the ecm b fuse should I check the fuel pump also to make sure the pump is working
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Sunday, January 16th, 2011 AT 7:36 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No, that means the short is in the fuel pump and the tank will have to be dropped and the pump inspected to find the problem. I suspect you have one of the wires touching the pump frame.
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Sunday, January 16th, 2011 AT 7:39 PM
Tiny
CALVA
  • MEMBER
  • 6 POSTS
The pump was no good and it kept shorting out the fuse, I got a new pump and its running good now, thank you!
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Wednesday, January 26th, 2011 AT 6:59 PM

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