I had a power problem with my Lippert leveling jacks and slide out. I solved it by replacing a 25A fuse. But now, when I activate my jacks, the slide out also extends or retracts. Is it a wiring problem, or is it a hydraulic valve problem? My guess is that the slide out hydraulic valve is stuck open. When I operate the slide out from inside the coach, they work fine. But when I extend/retract the leveling jacks, the slides also move. If I was certain that the valve is not operating correctly, how hard are they to replace?