Big Paul, I think the picture is a fuse release relay. Forest River didn't install any of these in my RV. Instead they used inline blade fuses. Tracing wires is a bit of a pain. My local repair shop found mine close to the exterior switch and the elect. motor. He said he had to remove a panel. (he said). Have you checked to see if their is power to the switch (12volt light tester)? On the other hand in the interim I used a cordless drill with a short extension and a modified deep well socket cut on the end of the socket to fit the dowel pin in the end of the screw rod of the stabilizer. The manual screw jack that came with your RV should give you a guide.
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going