[Weldangrind]

I don't have a wiring diagram for you, although somebody here might offer one.

In the meantime, follow the red wires from the battery; you'll see that the large gauge wire goes directly to the solenoid, and the small wire goes to the key switch (most likely). The first step is to turn the key on and then connect the two large studs on the solenoid with a screwdriver or jumper cable (be careful). The engine should immediately turn over, which will tell you that the starter is ok. Because the key is on, it might even start.

Once you've accomplished that, turn the key off and provide power to the two small wires that connect to the solenoid. The solenoid should engage and activate the starter. If it does, you have a short somewhere that is preventing power from getting to the solenoid. If it doesn't, the solenoid is bad.

We can move forward once you've tried these steps.