As the OP of this thread, I never did find out why my cruise control malfunctioned. But after disconnecting the wiring by way of the connections at the base of the steering column to the smart wheel, checking the switch functions with a dvm and finding no problems, I put it all back together and the cruise control issue was gone.
However now my side view cameras don't work when I signal to change lanes. Something I'll have to look into again at a later date.
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP