Actually this alternator can work properly with only two wires. The large output terminal must be connected to battery voltage. The case is grounded and does the same electrically as the ground terminal. The F terminal is connected to one brush and needs to have voltage applied to it from the voltage regulator to control charging rate. The other brush is grounded internally. The other terminal at the plug provides voltage out as means of controlling a light and commonly used to control a relay in the voltage regulator but is not necessary for the alternator to work.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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