Let me start from the beginning. 1993 Ranger XLT Super Cab, I cant figure out what is going on. I drove through a really large puddle on my way home and splashed muddy water everywhere. I drove another 15 min uphill with no problems. The next morning my truck was dead. I knew the alternator was starting to go. I jumped the truck and it ran for about ten minutes and died. it cranked several more time and only ran for a few seconds before it died each time. I noticed the fuel pump kept running when I turned it off and REMOVED THE KEY. I changed the alternator and it started up and died, and the fuel pump did the same thing. It kept running. I replaced the fuel pump relay and the fuel filter and poured black gas out of the old filter. Im at a loss. Why does the fuel pump keep running when the truck is off and the key is out? And why wont the truck stay running? By the way I am stationed in Italy so the mechanics out here dont speak much english and they dont have a lot of experience when dealing with american vehicles. Please help.

 

Well, black gas would lead me to suspect your pump is toast and not giving it enough pressure. So replace that.
There's obviously something shorting out, but you replaced the obvious thing, the relay.