On my SOB TT, since the outlet the refer was connected into was accessible from the outside when the grille was removed, the outlet was fed from the bathroom GFCI.
Long-winded way of saying "check your GFCIs".
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam
Self restraint is for the young. I'm old and want it NOW!