I got out there and tried to do some exploration yesterday. I thought that perhaps the electricity came up through the outlet to the two lights, and perhaps the outlet was faulty, opening the circuit. Nope. In fact, the outlet's only feed is to/from the overhead light, which in turn feeds the outside light. I took down a couple of ceiling panels to figure this out. There's another line going somewhere
but I can't see due to a roof joist. More exploration would have to wait until I'm ready to take down the rest of the panels.
The roof and joists look to be in excellent condition, aside from some sort of substance up there (possibly rat crap). The roof is actually insulated, as well as the walls. I couldn't believe it.
I think the structure is sound. Now I do have to fix one of the outside walls and gut the interior, but that looks like it. Whomever did the ceiling shouldn't ever be allowed to do another one, but that's a personal gripe. No effort whatsoever to match the panels to the joists, they added other pieces of wood so that they could nail.
I looked again under the shed, and can't for the life of me figure out how it was powered. I'm starting to think it had a roof-to-roof line going to it, but at some point that was removed. Possibly when the addition to the house was done. But that was ten years ago. Hard to imagine someone going for ten years without power out there, but the fixtures retaining their bulbs. Really odd. In fact, the oddest thing about this house.
I think I'm going to make this my running diary. Yesterday (after my demo and reinstall of the ceiling panels) I made a ledge for my Ryobi One+ tools to hang from, similar to this one:
Any tips on how to maximize space in here? About 1/3 to 1/2 of it needs to be storage space (or the equivalent), so a big work area is out of the question. I considered taking out the top half of the walls and putting in pegboard, but perhaps a french cleat system would work better.