I used to own a 17c. It was a good little camper, but we outgrew it. The only issue that I ever had with it was that the rear break lights weren't sealed well at all, so water could get inside the break light covers. Once during a severe thunderstorm, they filled up, and actually leaked into the camper through the holes for the wiring. Once I figured out what was wrong, I sealed the top/sides of the covers with a small bead of silicone (over where the cover meets the camper), and that stopped the issue. I figured that if I ever need to change the bulb, I could still peal off the silicone to remove the cover if needed, and reapply more when done.
2013 Jayco Jay Feather X23B
2008 Chevy Silverado 1500