Tony, regretfully I don't have good news for you. There are no wiring diagrams for the vast majority of RV's built. And certainly none for the plumbing period. If you're having any problems, let's start with one of them and go from there. Your RV may not have a battery cut-off switch.
Jim and DW 49 years Brenda
2017 38rssa, also a 2015 Salem (for Alaska)
2019 F450, ruby red
Harley Road King & sidecar