Boatdoc, those red things are connectors not fuses, at least in my 3600RL.
I want to pose another question somewhat related because one needs to know it in case of trouble.
It took me quite a while to find the manual connection to control the front extenders. In my Bighorn it's through a hole in the black metal wall behind the pump for the hydraulic slide-outs. There is one problem however, it's a solid 0.5" rod with a little cross pin.
The tool that came with the RV is a .5 " solid rod too with a cutout. Either it's the wrong tool or I am missing some tube that fits over both of the 0.5" rods. Any suggestions?
Also, the hydraulic pump can be run manualy through a hole in the basement wall using a 6-7" long 0.25" hex Allan wrench. Did anyone get a tool like it with the RV or am I supposed to go hunt for it?