S10 water pump battery drain.

So my 2000 S10 has had some coolant issues in the past,
mainly being clogged up due to bad maintenance by a
previous owner. This morning on my way to work the
engine got very hot and the battery light came on. I topped
off the radiator and radiator and reservoir, and it seemed
to hear cycle normally and didn't overheat, however the
battery didn't charge and I almost didn't make it home. My
mind is telling me that the accessory belt has drag on it
most likely from the water pump with a bad bearing,
keeping the alternator from charging properly. Any ideas?