I have a 1984 w/ external voltage regulator, my brake an charge light flashes on an off? If you pull the positive battery cable off it runs fine so its charging, right? It only does it sometimes, it may do it once or twice then it may do it for 20 or 30 miles. I have put 3 alternators on it including a factory unit. This my DD over my Ranger on 38s? Any ides? TIA