almost all manufacturers are calling them generators now. Externally Regulated, these older style alternators can be referred to as a 2-wire, 3-wire, or even 4-wire. The SI series alternator is a factory GM part found in various vehicles from 1969 to 1985. We all know our vehicles run off DC and not AC so they started calling them generators. In that case, the additional connector and wires used on the traditional SI are unnecessary. When you start to look for an alternator, be it a simple aftermarket replacement, or a heavy duty performance unit, start your search at Speedway Motors. SI alternators use a three wire hookup, with the large battery stud, a brown exciter wire and smaller red voltage sense wire. The newer Tuff Stuff unit shown is rated at 70 amps, compared to the 38-55 amps of original units. We offer three main types of alternators for your Ford: The 1-wire, which is great choice for a clean setup and easy installation, the 3-wire OEM-style replacement, or the earlier externally regulated alternator. We just talked about this in class and I think it was something about alternators technically convert mechanical energy to electrical energy in the form of alternating current.
The 1-wire alternator offers a simplified installation and clean setup.
Also be internally regulated and have a charge post and two terminals.
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One of the largest contributors to the confusion is the fact that some one-wire alternators are built using an SI series case. The confusion is understandable, but knowing what makes the two different can clear things. Because many one-wire alternators look like this: By contrast, a General Motors SI series alternator looks like this:.see what we did there? Its available in a variety of amperage ratings, and has become a common replacement for the externally regulated item found in earlier vehicles.
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Certainly a valid question, and a common source of charging system confusion. The brown wire is what would typically be tied to a charge warning lamp, and is responsible for exciting the charging system. Original Autolite models (1964-'71) had rounded corners on the cases, and when Ford switched to Motorcraft in about 1972, they also devised a convenient Y-shaped plug with caps for the connections. Regardless of the name, the important difference is that they are designed to work with an external regulator. This means it could look like an SI alternator, but be modified internally to self-excite at a specific engine RPM. You wanna get some weird looks tell someone your Alternator/Generator is leaking antifreeze. Our Classic Update kits (and Factory Fit parts modified to work with an internally regulated alternator) work with either style, but its crucial to make sure youre aware what is bolted to the engine before making any connections.
1976 Ford Alternator Wiring Diagram - Wiring Diagram Blog. Wiring Two Fa n Relays. Cucv alternator, gonna use 2 of these. The confusion is understandable, but knowing what makes the two different can. SI alternators use a three wire hookup, with the large battery stud, a brown. None have ever even heard of an 01 with a two wire connector.
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