Re: 1 wire alternator confusion

Posted by BigKev On 2022/12/8 9:08:40

Are you sure it's a 1-wire?

Sounds like a standard GM SI Alternator to me. Aka 3 wire.

The large stud goes to the battery. One of the terminals goes to the dash light and then to ignition power.

The other terminal is the sensor/exciter, which most people loop over to the bat stud on the alternator, but really should go to the main junction on the battery harness.

You can look at my project blog, as that's what I have in my car.