September 2009 Shop Manual
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This diagram shows the basic configuration of a generator. The armature is made up of loops of wire-as it spins a magnetic field current moves through the loops of wire and is delivered through the commutator contacts (which are the ends of those loops of wire) through the stationary brushes (that make contact with the spinning commutator) and current is delivered to the load.Generators can work with either a positive or negative ground system (and since you're replacing an alternator, your car is probably the latter) but they have to be polarized appropriately-that means establishing which field winding is the north pole and which is south, and that determines which way the current flows in the generator. View Related Article
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