1997 Chevy Tahoe Fuel pump blowing ECM-B fuse

1997 CHEVROLET TAHOE
18,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
STEELDAWG47
  • MEMBER
  • 3 POSTS
Never a problem with this truck however,this morning,I tried to crank it and immediately checked fuses and found the ecm-b fuse blown.Replaced the fuse ,put key in on position to listen for fuel pump and heard it come in,but about a second later heard the fuse blow again.I ran out of 20a fuses and out of curiousity used a 30a, and it held (not that I'd run it that way),but thought the fact that it held may shine a little more light on the problem.Any suggestions? Thanks.
Jan 26, 2010 at 8:05 AM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Its shorting out some where within the fuel pump circuit-disconnect the fuel pump connector and try again-blows remove the fuel pump relay and see what happens
Jan 26, 2010 at 8:09 AM
Avatar
STEELDAWG47
  • MEMBER
  • 3 POSTS
That was one of the first things i did.Could it be the pump itself?And if was simply a short,would the wire not have burned when the 30a fuse held?
Jan 26, 2010 at 8:15 AM
Avatar
STEELDAWG47
  • MEMBER
  • 3 POSTS
I know it wasn't much of a donation,but expected a less generic answer.Anyone else have any sugestions.It would be greatly appreciated.This is my only vehicle and I'm stranded here.
Jan 26, 2010 at 8:30 AM
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Sometimes it shows and not at all-to rule out the fuel pump set a jumper wires with an inline fuse same amperage and power it from the battery and see what happens-could very well be the computer control of the fuel pump relay circuit
Jan 26, 2010 at 8:32 AM
Avatar
STEELDAWG47
  • MEMBER
  • 3 POSTS
Thanks
Jan 26, 2010 at 8:53 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.