Were you able to identify the relay? As far as overcharging, was the needle still in the safe range? Finally, if it is overcharging, the most connom problem is the voltage regulator. Now comes my question. Chrysler made some with regulators in the alt itself, mounted to the firewall, and some were part of the PCM (main computer). You should try to get the truck to a parts store where they can check the alt output and determine if it's bad.
Let me know what you find.
Thursday, January 15th, 2009 AT 5:49 PM