keep the engine running while using the levelers, if they will work that way
the alternator should be charging the house batteries
most RV's have parasitic loads that are CAN NOT turned off
be sure to use the battery disconnect switch, check to make sure lights fridge water pump etc.. have no power/quit working, when using the disconnect
if NOT then the disconnect may need to be replaced
if you have an inverter, it has to be turned off manually they will use several amps just setting turned on, might have to pull a fuse for total disconnect, inverters are connected directly to the house batteries, they stay connected, are connected and use tiny amount of power for the remote control circuits, even IF turned OFF at the remote switch ( switch has to have power in order to work )
if stored at home then plugin an extension cord, leave batteries on/active and let the on board converter maintain the charge
I can explain it to you.
But I Can Not understand it for you !
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1997 F53 Bounder 36s