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Old 11-19-2020, 03:02 PM   #9
VetteVet
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Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,703
Re: Alternator Wiring

The short answer is you can't. The one wire alternators do not have the internal ability to back feed voltage to the light to allow it to illuminate during charge or discharge. It requires an exciter wire to the L terminal in the alternator.

The gauge dashes can be wired to allow the battery gauge to work with a one-wire alternator if the circuit is wired correctly.
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