[DieselSJ]

Originally Posted by franken

Obviously if adding another solenoid resolved the issue, it was never heat soak because the heat hasn't changed a bit. The wiring was changed, which is the actual issue. Adding more components to a system that someone can't troubleshoot is not the correct answer.

Yes, heat soak was the issue. The solenoid on the starter gets heat soaked and it can't pull enough current through the ignition switch circuit. Going to the Ford solenoid allows for it to basically pull as much current as it needs and that helps to overcome the issue. Not to mention you also get all of your main electrical feed and charging wires up out of that hot environment which helps everything.