re: Pulled the wiring harness from my fifth wheel

Yes, it's just your typical metal junction box where the wiring harness from the camper connects to all the wires within the camper.

Is there a way to test the brakes with a multimeter? I know you can have someone push the brakes and listen for the magnets to activate but I'll be solo on most of this.

Also my truck was registering when I hooked the rv up but after I rewired some stuff it's no longer doing so. Makes me think it's a wiring problem and not a wire being pulled loose. I'm just at a loss because with the lights working there's literally nothing else to wire up so it has to be wires connected wrong but every diagram I've seen has it the way mine is.