I have a 2012 Dutchmen Bunkhouse that has an outside stereo. The stereo is broken...that is the light is on as if it is turned on but nothing is displayd on the screen, and it does not work. It ha...
Se if you can figure out what's on the backside of the stereo? Is it mounted outside on the other side of the dinette or something? There might be a false panel inside the trailer that you can remove and access the wires. Once there just remove any fuses you see behind the stereo and see if the light goes out.
On that note you might want to check your regular fuse panel in the trailer. There might be a fuse in there for just the outside speaker.