What to do is confirm there is no power to the smaller wire on the starter when the key is in the start position. You will need a helper to do this. I attached a link above that should be helpful. The smaller wire is purple and should only have 12v when the key is in the start position.
Once we determine if there is or isn't power to the (s-terminal) on the starter, we can go one of two directions. If there is power, chances are the starter is bad. If there is no power, we will need to work backwards to see where the power loss happens.
I attached the entire wiring schematic for the starting system on this vehicle. Also, did you check if makes a difference if the vehicle is in neutral? Do you see the P or N when the key is in the on position?
Let me know.
Monday, August 17th, 2020 AT 8:48 PM