Just wanted to update the post, we still don't have a solution and dealer is still troubleshooting. Here's their response on what we've found so far:
"The problem is far beyond fuse 1 & 10. When we pulled all of the fuses fuse posts 2,4,6,7,8, & 12 all had 12volts, fuse 5 had 7.5volts. We pulled the fuse block out and checked the back side for corrosion or something that would have created this very strange connectivity. The fuse block is fine. This leads us to believe that there is something in walls or floor that could be causing this."
They dropped the underbelly and checked all areas where they did duct replacement work as well as in area behind fuse box where our drawers were not secured with screws (from mfgr). As final attempt, they swapped convertor and problem still exists. We are now at stage where they need to start pulling the walls down to visually inspect the wires. Ugh...such a bummer.
I was also able to contact Monaco RV and request diagrams on the trailer which I just rec'd -yay! I'm hoping we will be able to narrow down areas to troubleshoot. I'll update once I have more details.
