not sure if this happens a lot but i have a 94 samurai frame, fuel system, tranny ect.. i have a 1.6 l 8v swapped in with wiring harness done by trail tough, all under an 87 body... it ran excellent! but the other day i was driving it and it died all of a sudden. the gas gage worked 30 seconds before it died, but after it died i couldn't hear the fuel pump running nor would the gas gage work. so i checked the fuse box and sure enough a fuse had blown. i replaced the fuse and it immediately blew again, leading me to believe that  i have a short going to my fuel pump. But i got to thinking that maybe this is something that typically goes "bad" when the fuel pump it going out or is out. so can anyone shed a little light on the subject for me, or has this happened to anyone else? and help would be greatly appreciated...

some one has to have some input!

A blown fuse is the result of an overload or a short circuit - theoretically a defective pump could draw enough current to blow the fuse, and there's one way to find out - disconnect the pump and replace the fuse.

Now here's the catch - for a stock vehicle - we (any one responding to you) can pull a manual, if we have access to one, and know what fuse protects what circuit - on a modified vehicle, that's not so easy.  Trail Tough should know, or, if you're lucky and someone here has a similar conversion, or is familiar with Trail Tough's work, you might get an answer.

Looking at a diagram for the 8v EFI - the fuse that protects the pump, also powers the ECU, the ignition and a bunch of other stuff - so it can be any one of those - or - none of them, if Trail Tough wired things differently.

My first step would be to see if Trail Tough can get you a diagram or go visit Ack's FAQ, get yourself the stock wiring diagram and hope you're lucky - by the way - there were two different 8v EFI systems, so you do need to know which one you started with - the fuel pump control circuits are different.

I ran into a brain stumper a few weeks back with a weird fuse/power issue.  Long story short... that single wire that mounts to the stud on the back of the alternator was touching the alternator housing causing a short/loop in the electrical system.  Took me forever to figure out but it was popping fuses.

I would double check all your connections... starter, alternator, engine grounds, etc.

Then I would eliminate the possibility of the fuel pump being the issue by trying to power it directly to see if its working.  Work backwards from the pump. If not the pump then pull the fuel pump relay and test the plug to see if its switching power. 

Sounds like a short somewhere though.  Check the simple stuff first!!