External Regulator Models With Warning Lamp

I and S Circuit

Jumper Wire:

1. Disconnect the regulator wiring plug and install jumper wire between the A and F terminals.
2. With the engine idling and the voltmeter negative lead connected to the battery ground terminal, connect the voltmeter positive lead to the S terminal and then to the I terminal of the regulator wiring plug. The voltage of the S circuit should read approximately one-half that of the I circuit.
3. If voltage readings are normal, remove the jumper wire.
4. Replace the regulator and connect the wiring plug. Repeat the load test. Load Test
5. If no voltage is present, service the faulty wiring circuit at the alternator. Connect the voltmeter positive lead to the positive battery terminal.
6. Remove the jumper wire from the regulator wiring plug and connect the wiring plug to the regulator.
7. Repeat the load test. Load Test