2014 FC 12 volt problem

I just went to my storage facility and disconnected the shore power from my trailer. I opened the trailer, pressed the battery use switch and flipped the switch for the kitchen and dinette lights. Nothing??? I went to the bedroom and turn that switch on and the bedroom lights came on then quickly went out. Same with exterior lights. I have a cigarette lighter battery indicator and it says the battery is fully charged(13.68)

I then plugged the 110 back and lights worked . Disconnected and tried again , still nothing in battery???

Any suggestions or ideas??

Thank you









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