"dead shorted" means a live wire inadvertently was grounded which in your house will blow a fuse (if that makes it easier to grasp) & in the vehicle the excessive amperage flow from whatever reason will melt insulation & eventually open the fusible link (usually too late!). "Full fielding" means that the reg (improperly) is giving full voltage to the alt field circuit instead of REGulating it like it should & making the alt put out 15+ volts & usually its a reg fault (bad reg) or a "dead short" in the green wire from the alt field green wire terminal back to the reg side green wire nub (its grounded somewhere along its length, somewhat rare but happens, gets pinched) & alt brushes/brush holders are a frequent culprit. Did not think it was likely from charging a depleted batt but I had to throw it out there to get us started. Holler back if anything comes to mind