short circuit ? electrical prolem? help!

the other day i was driving my dart, when all of a sudden, i lost all power. I had some buddies help me push it back to the school parking lot, and i noticed the ballast resistor was cracked, so i figured that was the problem. I changed it and i still had nothing. So i checked the fuseabkle lnk, and it was fried, so i replaced it but as soon as i touched the positive terminal it cooked the fusable link again. i looked under the dash, for a short, but i havnt looked too indepth. I was wondering if anyoe else had the same problem, and what fixed it?