W123 79 300TD Battery Not Charging!

[johnbob]

The battery on my 79 300TD wagon isn't charging at full capacity. I have already changed the battery and the alternator and have also cleaned the chassis ground connectors and crimped down the cables a bit to get better contact and the battery still only charges at around 10.4-11.7 and every once in awhile it will hit 12.2 (for only a few seconds) but it should be between 13-14. What am I missing?