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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2019 Posts: 2,243 Herder of Cats, Goats, and Sheep (moderator) | | Herder of Cats, Goats, and Sheep (moderator) Joined: Jan 2019 Posts: 2,243 | The LS ECU will manage the alternator for you. You can leave 4A hanging (taped off or de-loomed), then just not worry about the voltage sense wire on the left connector in your picture.
Edit: The LS harness will have ignition switched power. Depending on how it is set up in the painless harness, you might be able to use 4A to feed it.
You will still need the large wire from the alternator to the battery/starter. It is likely that it should be thicker than the AAA harness provides because the LS alternators were higher current than most any of the stock older ones.
Last edited by Fibonachu; 08/19/2024 4:27 AM. Reason: Add detail
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