On our 40 fer the outside light switch is under the cabinets, the top row. Looking from the front to rear there is a Rocker switch, then 2 little switches together then another switch. The outside light is on the second set of switches the one towards the rear.
2011 jayco 33rlds, 2002 Ford excursion, v-10, 3:73 gears 4x4 mine. 2008 Suzuki sx-4, hers. Retired Air Force, now Retired.