bjones - I was responding to the original topic of this thread - running lights on camper. I agree with others, your white light should have a switch. If the light is on the front of the camper, feel along the bottom of the body of the light for the switch. The light is almost certainly a 12 volt light, but it receives power from your converter/battery charger when the cord is plugged in even though the battery is disconnected.
2015 Rockwood Ultra Lite 2604 WS. Rear LR, large street side slide with small wardrobe slide in BR.
2014 Ram 1500 Eco Diesel Laramie Quad Cab.