1987 electrical problem.

[dugie6551]

I have a 1987 S10, ( 2.8L 4 spd 2wd ) that keeps blowing the ECM 1 & ECM 2 fuses when I turn the ignition to start the truck. I have checked ( and repaired !! ) the wiring to the gas tank fuel pump, but it is still blowing the fuses. I have all the grounds tight, help !!!
I have torn apart the back wiring harness and have not found any problems. The front is next. I had the fuel pump replaced last year.

Does the relays in the engine compartment need to be grounded ? They are not attached to the fender. OR have I fried my computer ?

Thanks for any help you guys can give me.

[Ryan_brink]

Originally Posted by dugie6551

I have a 1987 S10, ( 2.8L 4 spd 2wd ) that keeps blowing the ECM 1 & ECM 2 fuses when I turn the ignition to start the truck. I have checked ( and repaired !! ) the wiring to the gas tank fuel pump, but it is still blowing the fuses. I have all the grounds tight, help !!!
I have torn apart the back wiring harness and have not found any problems. The front is next. I had the fuel pump replaced last year.

Does the relays in the engine compartment need to be grounded ? They are not attached to the fender. OR have I fried my computer ?

Thanks for any help you guys can give me.

Try following the wire from the ECM to the fuse block and look for any bare spots and if in doubt just run a new wire all in general, I am doing mine tommorrow I will let you know how it goes.

[Drova]

mine done the same thing and it turned out to be a bunch of wires running down the firewall behind the motor were grounding on the cab

[Drova]

i believe this is an old thread :S