short circuit

[bronick65]

ok my 89 was running great, it stopped, and the black #2 sublink melted. replaced link and it melted, below the link, replace wire staight to eci control relay, it stated melting the br wire that goes to the injectors, resistor. did an eci check and it was bad. any one have any other idea why this happened.

[Indiana]

No there wasn't a ECU that causes a fuse link to short you have a cut wire, short or crossed wires somewhere. Disconnect the battery now before it burns the car down. Start looknig for one of the wires near the battery, battery tray or the radiator support. If the cable ends were cut off and those bolt on strap things used they may have had to pull on the cables to get them to work and cut the insulation and its grounding out. If it were a big short the fuse link would burn out but its may be a short that's small, just a nick in the insulation that lets the short be intermittent and a fuse link can take a continuous load much higher than you think and not burn out. It also may not be just the power feed to the injectors it might be every other power wire in the harness so you are looking at replacing both the ECU and body harness. When the insulation melts to the insulation of another wire and they make a bundle those are harder to flex then is they weren't melted together.

 

Just this small cut that rubbed the battery tray did what you described but it melted many wires together through and ruined both harnesses.

 

http://www.b2600turbo.com/keith/IM009137.JPG

 

 

[bronick65]

thanks for the reply its the wire that goes to the eci circuit relay that supplies power to the ecu and i did a check on the eci and it was bad thanks again for the help will let ya know when i get the eci repalced