Driving into work yesterday and alternator was overcharging - looked like 18volts or more on the guage. It's about an hour to get there and in an effort to keep from frying the battery, I ran it with all acessories running, lights etc. When I started it up 30 minutes later, not charging at all, dead in the water. Do you think it's worth having rebuilt, or better yet, think I can go about doing it, or is this a professional's domain? I've immersed myself in all other aspects of Ruby's maintenance/upkeep including head gasket, transmission/clutch replacement, but I've never done anything more than Re&Re alternators in the past.

I don't think it matters, but it's an '87 Runner, SR5, A/C, 22RE/W56.

Thanks
Mike