In case anyone wanted an update, the problem is fixed. It was a short in the wiring at one of the top marker lights. It was caused by the installer who screwed the light in to the wire which pinched some of the insulation off and it eventually rubbed on a grounded surface. He began by rechecking what I had checked and then checked the tail/brake lights and the license plate light (which was wired to the brake light circuit instead of the running light circuit). After that it was just like checking a Christmas tree light string....start at the end and go one by one. Fortunately he found it on the second try. Hopefully he got it all sealed up as good as or better than from the factory.
I will say the only other complaint I have about the Travel Lite campers, speaking for the model I have 890SBRX anyway, is the front lower pass through window. It opens up in reverse of what it should. In other words, it opens up so the screen opening is to the side of the middle of the truck's rear window. Doesn't make sense and it renders opening that window as a useless feature. If it was rotated 180 degrees it would be a nice pass through to the back seat of the cab. I've asked the dealer to look at it and see if it could easily be changed around. It's funny how I look at the Travel Lite and see so many features and some well thought out attention to detail about layout and such, and then something like this slips right by them...
Otherwise I'm still pretty darn happy with it. Heading out for a long Labor day weekend to Damascus, VA to ride the VA Creep Trail.
2006 F250
Palomino Bronco 800