1994 Hardbody burning fusible link wire

[CaTalystX]

Hey all. I just bought a 1994 Nissan Hardbody from a family friend that has a strange problem. It will consistently burn all the way through one of the wires to a fusible link that plugs into the positive battery cable. This started happening when the previous owner had the car running and power washed the engine/engine bay to clean it up.

We got a replacement fusible link from the junkyard and it burned through that as well, so there is definitely something going on with the wiring downstream from this fusible link.

Has anybody ever run into this problem? Can you point me in the direction of what that wiring is for?

Thanks

[califrontya]

if a new fusible link does not get hot or melt when you put the ignition in the ON position (dont try to start the truck), then the issue has to do will the alternator...either the internal regulator is shot or there is a grounding issue.

If the fusible link gets hot with the ignition only in the ON position, then there is a short somewhere. At that point i would start disconnecting all lighting connectors near the engone bay and pull fuses. Then replace the fuses one by one until you find the circuit the is having issues. The fuses themselves are probably okay, but the circuit they are enabling might have a relay shorted or something.