I just replaced my battery cables on my 56 ford f100, which were a 6 gauge cable and replaced with a 2 gauge cable. I replaced them just as they were when I took off the old cables. The neg cable was bolted to the the frame and ran to the battery post. The pos ran from the starter solenoid and to the pos side of battery post. That was all that I did. So when I tried to start i heard and saw a small sprk from the battery. after that happened I had no electrical power to anything and the truck will not even turn over at all. The battery was fully charged because I had just taken it off of the battery charger. The cabeles were not crossed on the battery posts. It is the old style ignition system with generator and voltage regulator and all the old stuff. I took off the new cables and put the old one back on and even replaced the starter solenoid and still nothing at all. Any ideas????