Originally Posted by Bay M
I have 12.3V on the main cable on the starter. I don't have anything small enough to probe the ignition switch wire on the starter.
Use a large screwdriver to jumper between the large cable connection on the starter to the small ignition switch wire (make sure the car is not in gear first). If the starter solenoid picks and the starter turns, then the issue is not in the starter, but most likely in the ignition switch or the wiring between the ignition switch and the starter.