[911Rob]

As a construction engineer, addicted home renovator and by reading your post; my advise to you is "hire an electrician".

Electrical work is not the typical starter point in the home renovation program.

If your set on doing it; you don't need a wiring diagram? You just need to find some 'hot' power in a nearby light or receptacle/switch. You can blow small repairable holes in your drywall, use #9 wire to pull the wire through to where you need it. Hopefully you have attic access, and once again it becomes easier.

Don't be afraid to punch small holes were you need to, they patch and paint out easily. There are door jamb switches which can switch the light on when the door is open; they're the best for this application. The jamb can easily be removed and wiring hidden behind jamb/casings. Run your hot wire through the switch, up into the attic, to a light box cut into the ceiling.

You the man. Patch, Dap and paint.

Like working on cars, always use the best tools you can afford. Don't try doing a good job using the costco plastic case home renovators tool box. Hee hee.

Good luck, wish I was closer to you; I'd drop this in while you sipped a beer and watched? It's one of my addictions, can't stop renovating.