The best advice I can give you is to take it to a Big Country dealer and ask them to fix it.
Two things are clear from your question, OP: (1) that you are not especially technically adept, and (2) you do not have a technically adept best bud to ask. Unfortunately this leaves you at the mercy of an RV service department. But frankly, you are going to end up there anyway because, after all, you aren’t technically adept enough to do otherwise. You might as well save yourself time and aggravation and go there directly.
I do not say this with the intent to malign you. I have an in-law with a PhD, MD, board certification in neurosurgery and psychiatry who is also not adept in electrical or mechanical technology. Brilliant guy, lovely person, give you the shirt off his back, but NOT an auto mechanic or home repair sort of guy.
He, and you, OP, need to hire the work out.