I'm new here and not familiar with the Flagstaff or the fuse locations, but when you find the fuse, I do have a suggestion. My new 2013 Roo 23SS had the same issue with the slide out and it was a blown fuse under the TT. When the repairman fixed the issue, he replaced it with a self resetting circuit breaker (resets after a short time when tripped). Haven't had an issue since. All the best.
Greg, Barbara and Cody the wonder-pup.
2014 FR3 30DS
(and 2 200cc Scooters)