Assuming arguendo that is an accurate description of how the system is designed to function, I've seen just what I described.

That said, I agree that while anyone can be handed a tool -- and even trained how to use it -- only some can actually use it properly; moreover, as I noted, my comments are premised on the conductor plate being replaced as a result of a *proper* diagnosis. If it was guesswork, there is still work to be done...which starts with a correct diagnosis. And hence my use of the conditional "might."

Ultimately our goal is the same, helping the OP get down the road with a working vehicle.