Thanks for the info, Poncho. I didn't mean to infer the resistor fix was a hack; I was jokingly referring to cutting into the factory harness. I'll see how long it still works. Odd that this "cured" the issue for now. I've had the switch out previously with no change in the theft system error.
So, based on your understanding of the resistor fix would the following work:
Remove the connector from the keylock cylinder and insert a resistor in the end of the connector between the yellow and black wires and not bother to plug the connector back into the keylock cylinder. I'm guessing the resistor value is somewhat irrelevant because the system needs to be relearned anyway. Your thoughts?