I'm upgrading the alternator on my plow vehicle from a 78A SI-12 to a 140A CS-144.
Question is: From the L terminal from what I have read, a resistor or light is needed to protect the regulator. I'm thinking it is there to prevent ignition back feed(eng. won't shut off) condition. With my SI-12 a diode was used to prevent this.
I bought a conversion harness with resistor but, wondering if the common belief that it is there to protect the regulator might be wrong like so many automotive myths. Any thoughts ?
Question is: From the L terminal from what I have read, a resistor or light is needed to protect the regulator. I'm thinking it is there to prevent ignition back feed(eng. won't shut off) condition. With my SI-12 a diode was used to prevent this.
I bought a conversion harness with resistor but, wondering if the common belief that it is there to protect the regulator might be wrong like so many automotive myths. Any thoughts ?