Yes, my unit does have an inline fuse about 10" from the battery.
IF blown, the 12 volt system does not function. Found it searching for why my electric tongue jack quit working.
The inline fuse is enclosed in a small rubber type square holder with a flip top, green in color but your's could be any color. I had to get under the hitch to finally see it.
2012 Fun Finder XT 276 Toy Hauler & Harley Davidson Ultra Classic with Condor wheel chock
2014 Dodge Ram 2500 AT 4X4 Crew Cab 6.4 L Hemi, 373 gears, tow package, Rambox option, Revolver X2 tonneau cover, Equal-I-zer anti-sway hitch.