Motorhome wiring question

[Starry2some]

I plan to add a 12 Volt jack in the bathroom with a 20 Amp fuse to operate a small hair dryer. Am trying to find a good 12 Volt source for the supply. I noticed there are unused fuse slots in the panel in the entry well, including fuses that would be for slides (the 2900 has no slides) and others. What I need is to find where one of these wires goes, splice onto it and run to the desired location, install a fuse, and then The Missus can use the small hair dryer for a touch-up, and all is well in the world. Does anyone have any idea where those wires might go? I looked under the Convenience Center but did not see any unused wires.

Thank you all!

[bclemens]

You can tie into the 12V fan or the 12V lighting or run a whole new line from the fuse panel to the sink base.

[funfinder5]

Or do what I do for the wife. Run the genny in the mornings while she's doing her hair. I take this time to brew a pot of coffee too.

BTW, 12v hair dryers take forever which = upset wife early in the morning.

[Starry2some]

Brian, I was hoping for a dedicated line that would support ~12 Amps with minimal voltage drop, and the light/fan wire looks a bit light.
Funfinder, the 12V hair dryer is only for minor touch-ups, they don't have much power. And avoiding the generator is a goal of mine, hope to add solar PV and an inverter this winter and she then has the option of either dryer at any time.
Thanks for replying!

[RamblerGuy]

Have you looked in the power distribution center for an unused 12 volt fuse spot?

[Starry2some]

RamblerGuy, there are blanks where (presumably) I can add a fuse and run the wire, but I was hoping to avoid running the wire - yeah, I know, that's lazy, but if a large gauge wire already runs from the fuse block by the steps to the Convenience Center for a slide we don't have, why not repurpose that wire? It probably will be a perfectly fine solution, I just noticed those wires that are not in use and would rather put them to work than run additional ones. Thanks for the suggestion!

[RamblerGuy]

Yes, indeed, the first approach would be to find a wire that is already where you need it.