On shore power I just moved out a wall slide half way to load the fridge, a couple minutes latter I now power to retract it, I checked the other 2 slides and now power as well, every thing else that is AC is working fine including the awning is there a breaker that would control all three slides somewhere. Not a fuse or breaker in the main panel for slides
Without posting year/make/model of RV or have it listed in your profile, it's kinda hard to help.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
Problems with slides are usually low battery and/or 12v fuse related. Usually the fuses are in the fuse block/panel and/or close to the battery.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder
My Wildcat 5th wheel trailer has an inline fuse leaving a terminal strip loosely covered by a rubber shield and mounted near the battery. The slides work even when the battery disconnect is in the disconnect position.