On my 2004 American Tradition Fleetwood had loaded the basement light circuit to its max. 6 x 1.5A incandescent bulbs powered through a 10A fuse, so it ran at max rated load. If I left all the basement lights on for more than about 20-25 minutes the fuse blew. The pin in the Molex connector that carried that circuit was burnt from repeated max load pops. My solution, was to replace the bulbs with Leds to bring the amperage down, but I had to put a new pin in the Molex as well.
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL