cant get fire to my silinode how do i wire it from the switch its a 3 prong starter switch?

Answer 1

One big threaded stud goes to the big fat red cable coming from the battery plus 12 volts. The other big threaded stud goes through another big fat red cable going to the starter motor. Finally the little threaded stud goes to the wire coming from the ignition switch that tells the big threaded studs to be connected together and run the starter motor. Here's an electrical diagram:
http://www.indiacar.com/infobank/battery1_od.htm

Answer 2

Assuming we are not talking about the starter for the NASA Space Shuttle; As I recall, these things rarely go bad or need replaced, even though they still sell these three pronged solenoids, you only connect two wires to it. The key is remembering where the two wires went when you pulled the thing apart.

In other words, one of those "prongs" is an ancient relic that was used many many years ago on older model cars and what that extra "prong" was for I don't know. Probably when cars had generators and not alternators it was part of the starting process to the ignition switch . Have not worked on a car that is so old myself.

Even if you have three wires, only two of those prongs are utilized. Two wires on one prong and one wire on the other and the battery cable on the "big thingy" with the nut that threads on tight.

Good luck!