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Im working on an engine swap on a 1998 s10 blazer 4x4 4.3l.

Customer Question
I got everything back in...
Im working on an engine swap on a 1998 s10 blazer 4x4 4.3l. I got everything back in and went to turn over the engine and got nothing, no lights no power nothing. after fiddling with the fuse box I got it started. I had to take the head off due to another problem but after reasimbling it Im blowing ecm1 fuses left and right. Ive unplugged just about every sensor it runs to, removed 80% of the lume to check for bear wires and am still blowing fuses. last thing is the ignition as far as i can tell.
Submitted: 2 years ago.Category: Chevy
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Answered in 29 minutes by:
2/20/2016
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,438
Experience: ASE master tech for 40 years
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good afternoon my name is ***** ***** I will assist

the key here is the fuse box. the fact you had to mess with that to get it going is a clue. it may be damaged underneath where the connectors are. have you unbolted it and looked underneath??? I am going to check on what is on the ecm1 circuit

Roy

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Customer reply replied 2 years ago
I cant tell that it is damaged, at least not visually. I have an ome meter just not sure where to test for a good conclusion.
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

forget an ohm meter. you need a volt and amp meter. check the components involved with the diagram I sent you disconnect them and see if it still blows. if it does, it is wiring or the box. if it does not then it is a failed component that you just hooked up

Roy

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Customer reply replied 2 years ago
I may be missing it but Im not seeing a diagram. lol
Customer reply replied 2 years ago
alright so with the wiring harness detached there is no fuse being blown.so back to the harness any suggestions on how I should go about that?
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

detached from where??? the engine or the fuse block???

Roy

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Customer reply replied 2 years ago
Im pretty sure ive detached everything from the sensors, it blew another fuse shortly after that. I unplugged from the fuse box, flipped the key no blown fuse, Im feeling a bad wiring harness might be it. Would you know the part number for that ecm1 harness? Ive looked everywhere and cant find it.
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

I agree. it does sound like a shorted harness. no I am not a parts person. I would rely on a deaer parts department to get that info for you. there are on line wire harness companies but I am 0 for 3 in getting the correct parts

Roy

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Customer reply replied 2 years ago
Ok Ill give the dealer a call tomorrow and see what they can dig up. Ill let you know what happens from there.
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

ok

please dont forget to rate me as it is the only way I get paid for my ansers

Roy

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