Sorry if this is redundant, but you are getting 12 volts at the solenoid? When you press the START button?

Thanks!

 

Ok so to make this easier.

Which pins on the ignition switch (not the pushbutton) do you see voltage on before turning on the key?
When you turn the key all the way on, which pins do you now see voltage on?

From there, we will chase it to the push button and relay or fuse