What radio do you have? That will help.
I assume by "fuse" you meant the fuse in the converter for the radio. That's the first thing to check so good for 'ya.
As Herk said, check the radio's fuse next. My Genesis (Concertone) has a glass cartridge fuse inline in the back of the radio wiring. Need to pull it out of the cabinetry.
As for the TV, is your 2002 Shamrock wired for TV (do you have a panel next to your radio for a TV to plug into or next to one of the beds) or are you trying to retrofit the unit? The model of the radio would help here, too.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD