Is there a relay that the key switch energizes that switches power to the starter solenoid? There usually is. Do you have a circuit diagram? What about fuses in the starter solenoid circuit? Without a diagram or understanding of how the circuit works, it is pretty hard to diagnose. On the key switch when you turn it to the start position, what color of wire is energized? where does it go from there? just keep on chasing it..We know that the starter solenoid is not energized to pull up, so why not? you have to figure out what is in the middle.
James K0UA
I do not know if there is a relay for switch. I will try to get a wiring diagram.