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Question:

Question about 1-wire alternator.?

I recently purchased a 1-wire alternator and I'm not sure what to do with the wire harness that was on my stock alternator. Also not sure what the three wires on it go to. Can anyone experienced in alternator wiring tell me what these wires do and if it is ok to leave them unhooked?

Answer:

Can't tell you for sure what it is unless I looked but most alternators generate 3 phase power so maybe it's a wire for each phase of your power. The new alternator is putting all 3 phases into one wire internally to feed out. I would check with the manufacturer if the new alternator is compatible.
the three wires are prolly alternator turn on one wire for the guage and one random maybe ground or something what you need to do is look at the instructions that came with the 1 wire alternator to see if it needs a turn on lead if so you can check the three wires you have with a meter to see which wires put out twelve volts when the ignition is on this is a turn on/ignition lead then youll wanna find the lead that goes to the guage on the dash and make sure it gets twelve volts so the guage reads the other can be capped off
Connect the existing larger wire to the stud with the 7/16 nut.That goes straight to the battery+. Use a test light to find the smaller wire that goes hot with the ignition on.That goes to the terminal marked f or field.That turns the alternator on and off so it doesn't drain the battery when the engine is off. The other terminal on the alternator is to the gauge or light.

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