got the truck out on the interstate this morning and tried to set cruise control and it doesn't work either, so frustrating. It doesn't make any sense why the buttons work with the truck off, with key in the run position, but not while the truck is actually running. Cruise indicator even comes on while key is in run position, but not when truck is running. I guess I'm going to pull the wheel and completely disassemble both wheels and swap over the wiring and components. Looks like I have another weekend project. I shoulda known better when I was able to get it installed so easily.