Suggest you not get into the TV Mounting Mess till you have more information. Join the FR forum if you haven't already. They may be able to hook you up with a diagram as soon as tomorrow.
Did the Vacuum actually RUN for any period of time? Or did the circuit pop as soon as you turned it on?
Couple points about RV wiring:
1. Most RV's are wired like houses. The plan says "this switch turns this light on" but does not say how to run the wiring. Makes things hard to trace.
2. Many RV's are built in a part of the USA where the crew who wired your coach may not have electricity in their own homes.