There is a small resettable circuit breaker somewhere in the system. Sometimes under a red rubber looking cap. Might be on the tongue near the battery box. If a fifth wheel it id inside on the street side just above the battery under the rubbery cap.
B and B
2013 Rockwood 8289 Diamond Edition
GY D's/2.5 inch lift kit/Powerhouse 4 KW EFI Generator
2016 Ford F 350 Lariat Power Stroke Diesel Crew Cab FX4
2008 Golden Falcon 380PA Park Model Model "Oh Canada,True North Strong and Free!"
Found the 2 breakers by the battery. Disconnected the battery for several hours then reconnected it. Tried the slides and they worked. Thanks for the help saved me a trip to the dealer. It is a 5th wheel should of said that from the start.