blkhrn,
It would take a automotive electrical shop to diagnose a shorted diode in the alternator that could allow the battery to discharge. The 'parts store' alternator test isn't comprehensive enough to catch this problem
This subject came up recently in this forum, and the consensus was that after the engine was started, you should be able to remove a battery cable and have things continue to operate.
If you CAN'T do this, and your battery is only two years old, the odds are with a faulty alternator.
If you have a meter, you can test the system at the battery to see if the alternator is charging properly.
If your battery was discharged enough that you couldn't start the truck, you will need to charge it with a battery charger...not the alternator.
Stuart
