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Old 09-12-2018, 08:22 PM   #2
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Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,026
Re: The Mysterious "L" wire CS 130 Alternator

First, check the terminals on your alternator to see if they are marked "P L I S" or "P L F S".

If yours is marked "P L I S", you can use the "I" instead of the "L" terminal. The "I" terminal is simply connected to a source that's switched on/off via the ignition. No need for a light or resistor.

But if your alternator is marked "P L F S" you'll need to connect the "L" terminal to a resistor (35Ω minimum) or a light. The other side of the resistor or light should be connected to a battery voltage source that is switched on/off via the ignition. If using a light, it will function just like the "gen" or "alt" light in a truck without gauges.
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