Thanks for all the tips! This alternator is probably the original so
it's got a lot of miles, well over 100K.

Got it opened up. Brushes so worn they barely stick out when removed
from the slip rings.

Dang. One of the slip rings is very deeply grooved, can't be much metal
left. I weighed the constraints of time, money, etc. My wife's car, so
I've been driving her to work and home, 14mpg vs 28-30mpg and double
the distance, vs the difference between $100 rebuild or $20 brushes
plus $35 bearings plus $? slip rings... So I took it into a local
starter/alternator rebuild shop today.

Thanks, appreciate the help!

As far as resoldering the ECU, I have been an electronics tech for
quite a few years so I've had lots of good soldering experience. Not
for the faint of heart. Although it has no surface mount, it is fairly
dense and your average Radio Shack soldering iron is not up to the
task. And Radio Shack solder (at least in the past) uses a rosin that
is rather to aggressive for my liking.