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Car will crank but wont start, checked fuses and A/C and pcm fuses were blown, help?

Tiny
EDDYMAN30
  • MEMBER
  • 2000 CHEVROLET CAVALIER
  • 73,550 MILES
Didnt try to replace a/c fuse but I replaced pcm fuse and it blew immediately, car also make some power outage sound when I finish cranking, car has been sitting about 3 months beacause of this, thought it was the battery so I bought a new one, still didnt start
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Monday, September 17th, 2012 AT 10:29 PM

9 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the amp rating of fuse that keeps blowing? Note the diagram.
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Monday, September 17th, 2012 AT 10:52 PM
Tiny
EDDYMAN30
  • MEMBER
  • 28 POSTS
10 a
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Monday, September 17th, 2012 AT 11:35 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If the 50 amp pcm/havc fuse is blown, no voltage to the pcm 10 amp fuse. Maybe I misunderstood?
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Tuesday, September 18th, 2012 AT 3:33 AM
Tiny
EDDYMAN30
  • MEMBER
  • 28 POSTS
It's the 10 a pcm fuse under the hood on the drivers side of the car, right next to the ac fuse, I'm guessing its a short, I heard there was a recall on the 2000 Cavaliers for pcm voltage issues but I called and was told there was no active recall on the vehicle
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Tuesday, September 18th, 2012 AT 4:07 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Unplug the circuit from pcm. Use testlite across fuse terminals. If the lite comes on, it is going to ground somewhere in the wiring circuit.
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Tuesday, September 18th, 2012 AT 3:55 PM
Tiny
EDDYMAN30
  • MEMBER
  • 28 POSTS
Do you mean use the testlight on the pcm fuse slot in the fuse box? And would I have to take the pcm out the car to find the circuit, or is it labeled on the pcm?
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Tuesday, September 18th, 2012 AT 6:15 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
My info says the pcm is located right front of engine compartment, behind fascia.

Yes, I was talking about using the testlite across the fuse slot. Don't know if you have to remove pcm, I'd have to look at it. You might be able to just remove connector?

In the diagram, pins 19 and 20 are connected, so if it blows one fuse, it blow the other.
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Tuesday, September 18th, 2012 AT 10:12 PM
Tiny
EDDYMAN30
  • MEMBER
  • 28 POSTS
Ok thanks, I probably won't get to do it till Fri or sat cause its my grandmas car and its at her house, i'll let u know what happens
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Wednesday, September 19th, 2012 AT 7:49 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Good luck.
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Thursday, September 20th, 2012 AT 3:02 AM

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