The only thing a one wire does differently is that you may have to raise the rpm up when starting the engine to get it to start charging. Where the 3 wire will charge as soon as it starts turning. This has to do with field current signal.

What is the advantage of a one wire alternator?

“The benefit to a one-wire alternator is simply the ease of wiring — it allows for routing fewer wires and a clean installation. This type of alternator doesnt require a switched 12-volt wire to excite (wake up) the alternator so it will start charging,” Donaldson says.

How does a one wire alternator work?

0:197:34How to Excite the One Wire - Self Exciting Alternator. - YouTubeYouTube

What is an alternator exciter wire?

An alternator is an auto part that transmits power from the fuel system to the battery for operating vehicle accessories, such as the radio, headlights and air conditioning fans. A wire called an exciter generates the voltage needed for an alternator to start working once a vehicle is started.