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RICK
RICK, ASE Certified Technician
Category: Chevy
Satisfied Customers: 426
Experience:  28 YEARS GM DEALERSHIP EXPERIENCE, JUST A FEW TESTS BEFORE GM WORLD CLASS STATUS
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why does my ecm fuse keep blowing on my 1986 chevy s-10??

Resolved Question:

why does my ecm fuse keep blowing on my 1986 chevy s-10??
Submitted: 5 years ago.
Category: Chevy
Expert:  RICK replied 5 years ago.

Hi Customer. Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:


-How many miles are on your Chevy?
-What type of engine is in your Chevy?
i can check for bulletins and look at wire diagram.

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.

Customer: replied 5 years ago.
it has 148000 miles and a 2.8l it is 4x4 no a/c no power windows or locks. just your basic pickup.
Expert:  RICK replied 5 years ago.

hi joprys1,

there are couple ecm fuses which one blows? do you know, heres wire diagrams for ecm.

graphic.

 

graphic

 

Customer: replied 5 years ago.
before i accept, it is ecm b that keeps blowing. so what are the most common reasons, so i know where to start in the morning? i would rather take it easy tomorrow instead of chasing wires. maybe give me some ideas or starting points? that would probably help out the most.
Expert:  RICK replied 5 years ago.

hi Customer,

thats a good thing ecm b controls fuel pump relay circuit, could be relay internal fault, can switch with another relay in relay center to eliminate relay, next thing is oil pressure switch wiring gets hot by exhaust or rubs through, rots out by sensor, causing wire to ground out blowing fuse , this is most common problem.. i'll help you through this as best i can...

 

RICK, ASE Certified Technician
Category: Chevy
Satisfied Customers: 426
Experience: 28 YEARS GM DEALERSHIP EXPERIENCE, JUST A FEW TESTS BEFORE GM WORLD CLASS STATUS
RICK and 10 other Chevy Specialists are ready to help you

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