I've run into the problem with the America and Speedmaster more then once, and it sounds like the same thing.
The harness at the fuse box is stretched tight, and I've found that the wire for the main fuse (30Amp) pulls out of the fuse box just enough to lose all power. I've had to replace three harnesses under warranty over the past three years.
I would take a look at the fuse to see if you have power at both sides of it with a test light. If it doesn't, remove the fuse box and see if one of the wirse pulls out of the box. You can fix it by using an external inline fuse holder.