Need Help.... Trailer fuse blowing when towing at night

[Dug]

mvr, I would be sure its in your trailer lights . Backing the trailer into the water is a great way to make corrosion . Make sure that even your small side lights dont have water in them making a short. Clean the white corrosion off of the bulb sockets even if it doesnt look like that is making a ground. Up the fuse 5 amps in your H2 . Replace the rear tailight bulbs even if they are working. Good luck , doug