fuse blows every time I tow

[slammer]

I have a 2020 cherokee 24JS. The top plug type fuse in my fuse box blows every time I tow the camper. The fuse appears to serve the switchable lights in the camper (the ones you turn on and off by pushing the button on the oval, not tied to the main switch on the panel). the heating and air thermostat panel, the vent stove light and fan and one usb plug next to the bed.

I can replace the fuse and it all works as long as I don't tow it. I don't know how long it lasts before it blows but every time I forget to pull the fuse it's blown the first time I check it after moving.

any suggestions on how to diagnose this?

[TacomaJoe]

I'm thinking a short in the wiring of that circuit happens as you are bouncing down the road. I don't think there is any way for the 7-pin wiring to blow the fuse. Identify each 12V item on that fuse and try to picture how the wire would connect to them. Your eyes are about the best tool to find it.

[Jean D]

When we owned a different brand we kept loosing the trailer running lights and blowing a fuse in the truck. Dealer finally found the problem it was a screw that had pierced the wiring and every bounce in the road caused a contact that blew the fuse.