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It sounds like either a dead/weak battery or a loose or corroded battery terminal. What I need you to do is first, load test the battery, second, check terminals, and last, confirm the alternator is working. I realize both the battery and alternator were replaced, so my first suspect is a loose or corroded connection. It sounds like a lot, but it's easy to do. Follow these links:
You will need a volt meter or multi meter to check the alt, but it is a very simple process. Here is a link that explains how to use a volt meter:
Do these things and let me know the results. And honestly, if the battery terminals are corrode, make sure to remove the terminals and clean both sides of the connection. Anytime there is an electrical issue like this, it's important to start where the power comes from.
Friday, June 7th, 2019 AT 11:28 PM