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Nick_R_23 · 06-01-2021, 01:58 PM

You have what is called a PWM alternator, which can step its output voltage based on a signal supplied from the ECU. Unplugging it should allow it to run in a default output, but you can also pick up a small PWM controller or PWM generator and command it to whatever voltage output you prefer.

This thread should have a lot on information for you:

https://ls1tech.com/forums/conversio...hrow-away.html

Edit: If you are running a factory ECU/tune with your swap, then it is completely normal for the alternator to show a low output state. The ECU will lower the alternator output to improve fuel economy under certain conditions.

06-01-2021, 01:58 PM	#2
Nick_R_23 Registered User Join Date: May 2016 Location: Willow, Alaska Posts: 850	Re: Gen V Swap Alternator You have what is called a PWM alternator, which can step its output voltage based on a signal supplied from the ECU. Unplugging it should allow it to run in a default output, but you can also pick up a small PWM controller or PWM generator and command it to whatever voltage output you prefer. This thread should have a lot on information for you: https://ls1tech.com/forums/conversio...hrow-away.html Edit: If you are running a factory ECU/tune with your swap, then it is completely normal for the alternator to show a low output state. The ECU will lower the alternator output to improve fuel economy under certain conditions.