I know exactly what you said, what I'm saying is, IF IF IF IF the problem is something on the wiring as I described, THE ALTERNATOR VOLTAGE WILL BE IRRELEVANT and may in fact be "very high."

READ IT AGAIN. If a wiring fault has disconnected the alternator output from the battery, and left the voltage supply to the regulator IGN terminal going to the battery, then the regulator will "think" the battery is low (which it WILL be) and will ramp up the field current, causing a HIGH voltage condition at the alternator output. IT WILL NOT BE nominal 13.5-14.5 V, it WILL BE in fact much higher and CAN in fact cause this very problem.