Yep, 30 amp fuse is blown. Get use to adding several boards or other lift item under the jack tongue or you will continue to blow them.
Just had the same thing happen to my 25BHS...jacked too high while unhooking from the truck. I now us 4 2X6 boards cut to 12 inches to raise the jack before unhooking.
I too carry a bag of fuses in the trailer for this reason (and a few other).
2014 Ram 2500 Laramie, 4X4 CC, 6.4 Hemi, 3.73
2015 Jayco White Hawk 28DSBH Summit Edition