Generator Circuit Description

BATTERY POSITIVE VOLTAGE (B+) OUTPUT
The B+ circuit (Circuit 38):
- Supplies the generator output current to the power distribution box.
- Is always hot.

I CIRCUIT
The I (ignition) circuit (Circuit 904):
- Turns the voltage regulator on when the ignition switch is in the RUN position.
- Turns the generator warning indicator on if there is a problem in the charging system or associated wiring.

A CIRCUIT
The A (battery sense) circuit, Circuit 36 (Y/W):
- is used by the voltage regulator to sense battery voltage (B+).
- supplies current to the generator field coil.
- is always hot.
- is protected by a fuse in the power distribution box.

S CIRCUIT
The S (stator) circuit, Circuit 4 (Y/W):
- is used by the voltage regulator to sense the generator (stator) output.

Voltage is typically one-half of battery voltage when the generator (GEN) is operating.

NOTE: If the S circuit is open or disconnected, the generator warning indicator will turn on, even if the generator is operating normally.

The generator warning indicator will turn on if the S circuit voltage is zero. The warning indicator will turn off if the S circuit voltage is greater than 5 volts.