We traveled all summer in our Challenger and didn't have an issue. Get back to hour home base and drop it off at the Ft. Myers CW so they can replace a mirror they broke while installing our washer/dryer and when I pick it up the radio/camera doesn't work. The 12 volt is in "use" mode and everything else is fine on the coach.
It is just like there is no power to the radio. I didn't have time to start checking fuses but that will be my next step I guess.
Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO