Charging system not working properly

Hello,

It has to be a bad connection or the belt could be slipping. I've seen new alternators be fine at the store then not fine after installation. sometimes on the older cars the plug clip that snaps into the alternator breaks off and the plug doesn't seat the best make sure that is seated properly and snaps in. Is the battery light on?

This guide can help us test the alternator:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Have you tested the alternator with a Volt Ohm Meter after it was installed on the car? I would check at the alternators positive lead as well as at the battery terminal just to make sure.

Tom

Yep, I would try a AC Delco unit. here is the alternator wiring and a guide on how to test it to make sure the connections are working:

https://www.2carpros.com/articles/how-to-check-wiring

BTW, I have seen the cluster go out causing this issue. Check out how to change it out.

https://youtu.be/_HEC44xENxw

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.