drawings for 12VDC power here:
Not the best info as we no longer get real schematics and have to do far more guessing but this one looks simple enough to feel I'm correct on the guess! Some of them get too many lines in one spot to know which way it went!
Out of the load center breaker or fuse, up to the power switch and then on straight up to a wall plate behind TV? Does this look like your RV?
At the load center, this fuse or breaker for Circuit JD feeds power up to the switch.
Small wires are stamped with ID near the ends of each. We can "decode" that ID with this chart:
Power from load center into switch on JD and then when switched on, out on wire EX to wall plate?
Fuse good, power getting through switch, and getting all the way to TV?
The ground side of the circuit is not shown on these drawings!
See if that fits and gets it going? Shout back if there are questions or problems and we can take another look! There are two build dates of this RV but this seems to be the same for both???
Good luck on the search!