[Ned nyna 11]

HD
Check that the wires to the starter are connected. The big red wire from the battery, the wire to the solenoid.
If all connected, check the ground return by removing the braided strap from transmission to body and clean the connections. Same for the ground from the battery to body.
Next, check that 12 volts appear at the solenoid when you turn the ignition key. If 12volts appearwhen you turn the key, and nothing happens, the solenoid is faulty, if 12 volts are not getting to the solenoid, you are getting close. Next check that 12 volts appear at the starter solenoid wire in the quick disconnect plug on the driver side of the engine compartment.
If not check that 12 volts appear at the starter wire in the ignition switch when you turn the key.
If not check that 12 volts is always at the battery side of the switch. This will tell you if the switch has failed.
If the switch is working, the starter wire goes in a wire loom to a plug in the firewall from which it goes back to the multiwire connector in the engine compartment. That plug could be loose and thereby preventing the 12 volts from passing to the engine compartment.
This should get you ah, started. Let us know how it goes.

Ned