I hope I got this straight. You’re Lippert leveling system motor won’t work when you push the buttons. However, it works with your jumper the motor. The system won’t work if the parking brake isn’t engaged or the key is not on. Does your control panel show any lights lit on it before you try to run the motor?
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt Pure wave inverter/charger. 2013 Elantra on a Master Tow dolly.