I have a Northstar 8.5 Arrow mounted on my 2015 Chevy 2500, 4X4, long bed, single rear axle. A friend told me that when the truck motor is running that it is supplying power to the camper's on boar...
Wrong fuse. It should be labelled trailer power, trailer battery or something similar. RoyB has the easiest way to check if the battery is being charged off the truck. A meter can be purchased for less than 15 bucks, just follow the instructions. It would be a good tool to have, electrical gremlins seem to pop up at the most inconvenient times.