OK, I was able to determine that the 12V battery had died, and replacing it (back in Sept.) fixed the problem.
However now I seem to be having problems with the battery again. Is it possible the battery has gone dead again so soon?
Alternately I checked the fuse for the battery, a 30 amp fusible link. It looks odd to me, but I have not been able to find any picture anywhere of what the fuse looks like when it is undamaged, so I am not certain if the fuse is the problem. Anyone have a picture of a good 30 amp fusible link (Mitsubishi I-miev 2012) they can share?