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1995 Pontiac Grand Prix Its blowing a ECM Bat 20 amp fuse

Tiny
JO-JO
  • MEMBER
  • 1995 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 160,690 MILES
Can anyone tell me why this fuse keeps burning up? Its located under the hood in the electrical center on the passenger side of the car. I had recently had my heads machined and put it all together, charged my battery, got it started, took it for a 10 minute test drive and it ran great. I parked it, let it idle for a good 20 minutes while drinking a cold one so I could charge the battery and the car sputtered out. I tried to crank it up, it turned over but never started. I also put in a new fuel pump, relay switch, and ECM. I am currently unemployed and want to thank all my family and friends for all their help in getting me this far. HELP ME PLEASE!
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Wednesday, April 23rd, 2008 AT 3:19 PM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Take the power distribution box out, and check for burnt, or bare, shorted wires under it, chec ECM grounds.
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Thursday, April 24th, 2008 AT 2:34 AM
Tiny
JO-JO
  • MEMBER
  • 12 POSTS
I did all of the above, everything looks good as far as I can see. I even removed the eletrical tape to see the integrity of the wires. In my repair manual it says that 95% of the time a fuse is blown it due to faulty ground, I have checked most of the ground wires by untightening a retightening in a different position but it still blowing the fuse.
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Thursday, April 24th, 2008 AT 7:18 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Find the TACH wire, make sure it's NOT grounding out! Usually it's light brown. Goes on the (-) side of the coil.
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Tuesday, April 29th, 2008 AT 2:40 PM

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