Truck alternator keeps failing/blowing. Just replaced with a 90 amp unit stock. Something in charging system is failing as truck will only run on battery power then die. Where is the voltage regulator on this truck? I cannot find it anywhere on firewall or what does it look like? What else could be doing this? Not charging at battery terminals. Not getting the 13 or 14 volts at battery terminal when meausured with volt meter.

Where is voltage regulator and what does it look like? is it square box?

Thnks,

Wizard