During our first trip with the new TT I had reason to take a closer look at the CB panel. Right below the A/C 20 amp CB is a 5 amp CB labeled "Utility". I couldn't find anything in the TT that seemed to run off it. Called Jayco and they didn't know either. Anybody know the answer?
Dale
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Dale and Deb
2016 Jay Flight 27BHS TT
2009 Silverado 2500 6.6L Duramax
Could it be your utility converter, i.e. the battery charger/maintainer? Even at full output it wouldn't need anything near 15A so a 5A breaker would make sense.