Luvrv8 wrote:
My guess is the alternator is full fielding. If this were my truck I would check each wire at the voltage regulator with a meter to make sure they are hooked up correct at both ends, if they are I would pull the alternator and have it tested. Like I said m guess is the alternator is shorted to full fielding.
That is my guess also. Sounds like maybe the small plug at the alternator wired backwards. White/green is the field wire and white/black is alternator voltage supply to the regulator. Maybe crossed?
Look closely at the alternator, should be marked F for field and E for regulator supply.