The days of a faulty alternator draining the battery are long gone. I mean WAY gone. Say a positive rectifier shorts out, the only thing that happens is the voltage regulator USED TO turn on. Max -3 amp drain. But that ended with the SI alternator in 1985. The CS series of alternator needs a AC signal to turn on. The 2G, 3G 4G and 6G Ford Alts cannot short nor can the MOPAR it would take six shorted not open power rectifiers to even attempt a leak. Like getting four flat tires plus the spare as far a hypothetical coincidences.