Identifying Chrysler Alternators (1960-1976)

Grounded-brush Alternator
One brush assembly is grounded to the housing.
The other brush is insulated from ground and has a terminal.
The terminal gets connected to the output wire from the voltage regulator.

How this works.
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Line voltage is a power source.
Controlled current is how much, if any, electricity is allowed to flow through the rotor.
The more frequently the electricity is allowed to flow through, the stronger the electromagnetic field is.

There is only one wire to the field because the regulator controls the current flowing into the rotor.
The wire to the regulator is usually dark blue or blue with a white stripe.
The output wire from the regulator was usually dark green.


Isolated-Field Alternator
Both brush assemblies are insulated from the housing and have connecting terminals.
Both terminals get connected to the voltage regulator.

The rotor works the same way. The difference is the regulator controls the ground connection.
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When current flows through the rotor, it flows like this.
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