You're welcome? Anyways, I'm still waiting to hear back from a couple guys at work to see if they have some insight into this. My gut feeling is that this is all calibration based because your PCM is looking for things it shouldn't have (manual car switch inputs for the cruise control) and is setting a DTC that, as far as I can tell, didn't exist for 05 Mustangs. At this point, I would suggest load testing the power and ground circuits to the PCM to ensure they're all functioning correctly. Do you know how to do that?