Yes the 5 amp fuse on the slide is good.Did you check the 5a fuse in the Upfitter relay box? Fuse F4 can be put into one of two positions. In Position A, auxiliary switch 5 and 6, operate with the ignition in RUN or START. In Position C, auxiliary switch 5 and 6 operate hot at all times. Locate it near the brake master under the hood, check it for the obvious.
It is out of warranty. I was hoping to fix it myself.Is your truck still covered by the 3/36 warranty or do you need to try diagnosing this yourself?