Barb,
Well, first off, congrats on your new adventure, problems and all. RVs are no different than anything else man-made, THEY BREAK every once in a while. The first thing you want to do is, keep a level head and, try to logically proceed with potential fixes which, it sounds like your HUZ has been doing. Good!
Now, It's great that you listed what kind of coach and model. As for your Jacks, as has been asked, what make and or, possible model number are they? If all fuses seem to be good and, operational procedures have been followed, i.e. parking brake, engine OFF or ON, depending on requirements, and in "PARK" etc. then, you'll have to proceed to phase two of analyzing this kind of issue. That means are you ACTUALLY GETTING POWER to the pump etc.? You'll (your HUZ) will need a test light to tell if power's getting to the pump when buttons are pushed.
If you're getting power to the pump, well, it's possible a motor has gone south. If no power, then obviously, a search is in order to find out why and, where the break down in power supply is. And, speaking of that, make sure you're getting power to the buttons i.e. Panel, that controls all of them. Could be a loose wire behind that panel. Been known to happen.
As for the step, there's couple of things here too. One, make sure the ignition is in the proper position. Most need the key in the "Off" position for the steps to work properly. Once the ignition is turned on, the steps will retract automatically when the door is closed. Or, they'll retract automatically if, you have a door switch that's in the "Park" position. By "Park" I mean, the steps go in, every time you close the door, to keep from tripping over them while in a park or, camp site.
But, as you've indicated, they may not work in any position of any switch. Again, fuses, then, make sure power is getting to the little motor down there. AND TELL HIM TO BE CAREFULL! Those steps are NOT FORGIVING! If they operate while he's checking them out, some serious injuries can happen. BE CAREFULL! Some, have got their steps to start working again with tap on the motor from a small hammer. Those little motors can sometimes freeze up in a certain position and, need to be jarred to break free.
Try some of these possible tips. Hope something works for you. Good luck and happy RVing.
Scott
Scott and Karla SDFD RETIRED2004 Itasca Horizon, 36GD Slate Blue 330 CAT
2011 GMC Sierra 1500 Ext Cab 4x4 Toad
2008 Caliente Red LVL II GL 1800 Goldwing KI60ND