For whatever reason, when I pulled the ACC relay from the fuse box and re-seated it, apparently that fixed the problem. If it does this again, I'm replacing the relay.
Wanted to add that my 100 series had low voltage at each power outlet. Just removed and tested the ACC relay under the hood. When I installed the relay back, everything works fine again. Weird. Maybe a contact issue at the relay?
Same as you, if it happens again I'll be replacing that relay.