I have a 1997 Chevrolet 2500 that wont start the pcm/vcm keeps blowing {ECM-b} fuse

Tiny
SHERRIESUEXOXO
  • MEMBER
  • 1997 CHEVROLET TRUCK
  • 15,200 MILES
Where the pcm/vcm location
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Wednesday, October 26th, 2011 AT 6:14 PM

11 Replies

Tiny
ASEMASTER6371
  • EXPERT
Under the dash, left side.
First, I would remove the connectors from the pcm and re check the fuse. There are many things on the circuit and it may be another load or bad wiring. The pcm is an expensive guess especially if you are wrong.

Roy
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Wednesday, October 26th, 2011 AT 6:46 PM
Tiny
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Where is the pcm under the dash what does it look like
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Wednesday, October 26th, 2011 AT 6:52 PM
Tiny
ASEMASTER6371
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Behind the glove box door. It is about 6-7 inches square with 3 connectors on it.

Roy
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Wednesday, October 26th, 2011 AT 6:56 PM
Tiny
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Could it be anywhere else because im not seeing anything but the blower motor heater what else could make that pcm/vcm[ecm-b to fuse keep blowing and the truck will not start it ran fine and all the sudden it died and wont do anything
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Wednesday, October 26th, 2011 AT 7:10 PM
Tiny
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I believe the fuel pump is on the same circuit. Try disconnecting it at the tank and see if the fuse still blows.

Roy
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Wednesday, October 26th, 2011 AT 7:13 PM
Tiny
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Yes it still blows the fuse
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Wednesday, October 26th, 2011 AT 7:17 PM
Tiny
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Ok, look harder behind the glove box for the pcm. It is there.

Roy
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Wednesday, October 26th, 2011 AT 7:20 PM
Tiny
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Ok I found it how do I no if its the problem it looks like its fine
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Wednesday, October 26th, 2011 AT 7:29 PM
Tiny
ASEMASTER6371
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Looks mean nothing. Remove the 3 connectors and try the fuse again, if it blows, then it is something else and you need a shop to track it down. If the fuse holds, then it is a shorted pcm and needs to be replaced.

Roy
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Wednesday, October 26th, 2011 AT 7:32 PM
Tiny
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I just wanted to thank u so much found the problem it was a pinched wire Thanks so much again.
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Thursday, October 27th, 2011 AT 10:39 PM
Tiny
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Way to stay with it. Good for you. It is our pleasure.

Roy
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Thursday, October 27th, 2011 AT 11:03 PM

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