by Eddie » 02 Jan 2009 16:38
Jeff, do you have a DVOM,(Digi volt/ohm meter)? It is a small electrical test equipment box. It sounds like either the voltage regulator is bad or the wiring from the regulator to the alternator is bad. This wire is called the 'sensing' wire and determines the output voltage of the alternator. It cause the voltage regulator to increase or decrease the magnetic field in the stator inside the alternator producing more or less voltage. The alternator has a set amperage it wont go any higher, but the voltage can exceed 250 volts. It can cause a fire easily. Thats why the regulator is so important. If you have replaced most of the electrical components, which it sounds like you have, I would re-check the wiring to the alternator/regulator circuit. At 2000 RPM's what is the battery voltage? Disconnect the BAT wire on the alt.(full field it), what is the voltage now? If there is NO difference in volatge the regulator or wiring is suspect.