I would check for loose wires, bad ground or low water in the battery and yes, test the battery. Usually the dealer puts a cheap battery in the rig before they sell it and it may have issues charging.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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