I did some searching on this the other day as I've gotten the Charging system failure message on the DIC a couple times in the last few days on my base 06 daily, I recall something about checking connection running to the starter for corrossion or a loose condition.
I actually had the opposite problem with mine, volts were jumping up to 15.50 when I got the failure warning message.
Cleaned my battery terminals and the ground that runs to inner fender and still had the message pop up yesterday once.
Oddly enough I also have the same issue you spoke about the other day where the high beams will turn on when moving turn signal stalk to make a right hand turn lol
