I'm reading in the manual that the location is The circuit breaker, labeled “Slideout Power” is located on a panel on an interior wall of the passenger side storage compartment just
behind or ahead of the entrance door.
It's a 16 Navion 24V. I found the slider control after going around and around. It's in the storage compartment under the slide. One of the motors doesn't seem to work. After reading the manual I'm going to check the blinking lights on the controller to see what it tells me the problem is.