You should verify that all trailer brakes are still working. It is possible that continuous operation at full battery voltage overheated the wiring/connections and caused an open or short. Also, the plastic case on the break away switch may have melted making the switch inoperative for future emergencies.
Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'11 Crossroads Cruiser 32MK loaded