'03 6.0 excursion.
Cruise control only worked after driving for a while. Restarting seemed to help sometimes. There was a lack of power when cruise did't work. I confirmed the brake pressure switch showed brake pressure when there was none with my Autoenginuity and replaced the switch. All worked fine.
Now, several years later, I have the same symptoms. Cruise will only work after driving for a while, and low power until it does. I replaced the sensor again and nothing changed. Restarting does not help this time. Last trip, it didn't start working until 180 miles into trip. Autoenginuity shows no brake pressure when there should't be. It also shows all cruise buttons work correctly. Only thing I found is that Autoenginuity shows zero for vehicle speed (even though I am moving), and the speedometer DOES work correctly. Everything else works fine. Does the speedometer use a different speed sensor than the computer? Can you help me out here? Thanks.