Open Neutral and failed transfer switch

When will the disaster end? We raised the hitch end of the camper to open slides so we could again try and figure out the electrical problem. When the unit was raised and almost level, we noticed water POURING out of the corner of the unit on the outside. While facing the hitch , its on the right corner. It ran for a few minutes coming from inside the camper, NOT down the side. My husband checked out the roof AC (bedroom) and found nothing wrong. I wonder if this is contributing to the occasional cracking noise I hear from the air when in bed at night? Also I am afraid to think about how much rot,and mold may be growing in there, and how much we have been breathing in?
Tammy
Youtube Video of leak