Yes it's behind the fuses and breaker and is accessed usually by removing the basement wall. For me I wouldn't ever work on it without turning off the power to the rig and disconnecting the negative on the battery. I had an electrician slip with his screwdriver when working on the breaker box at a Burger King we were building. Welded the screwdriver to the contacts and the whole box had to be replaced. Damage to yourself or the rig aren't worth the few minutes it takes to make sure your safe, in my opinion.
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.