Just adding my experience on the DC side, I had to re-crimp all the heavy gauge wire connectors starting at the battery which were all improperly done (lose). It was almost like someone at FR used their teeth to install the connectors!
I had the same experience with my previous RV from Keystone so I guess it is a common problem.
2015 FR Salem 27RLSS
2004 Dodge RAM 2500 Quad Hemi