Generator Circuit Description

Battery Output Terminal (B+)
The generator output is supplied through the battery positive output (B+) terminal on the back of the generator to the battery and electrical system.

I Circuit 904 (LG/RD)
The I (ignition) circuit is used to turn on the voltage regulator. This circuit is powered up with the ignition key in the run position. This circuit is also used to turn the charging system warning indicator on if there is a fault in the charging system operation.

A Circuit 36 (YE/WH)
The A circuit or battery sense circuit is used to sense battery voltage. This voltage is used by the regulator to determine generator output. This circuit is also used to supply current to the generator field (rotor). The amount of current supplied to the rotor determines generator output.

Circuit 4, Pin S Not Used On 4G And 6G Generators:

Connector End View (Circuit 4, Pin S, not used on 4G and 6G Generators

S Circuit 4 (WH/BK)
The S circuit or stator circuit is used to feed back a voltage signal from the generator to the regulator. This voltage is used by the regulator to turn off the charging system warning indicator. The S circuit is fed back externally on integral mounted regulators on the 3G generator. This circuit is internal to the generator on internal regulator model generators such as the 4G and 6G generators.