I think its a bad starter. The solenoid has three connections.
A blade for a small black wire, and two studs, one has a wire going from the solenoid to the starter, and the other has nothing. I put the pig power wire on the open stud, and the blad connector on the blade, and when I hook the battery up, it starts.
Ill take some pics of them tomorrow. Im pretty sure I can fix them with a hammer, but I would probably feel a little uncomfortable under the car with them after that.
if the little blade connection gets power, it'll turn the starter over.. So it sounds like your starter was bad internally, and allowed the wires to touch.