I would check the battery cable terminals at the battery, make sure the key system is off and wear protective eyewear and gloves.
Here is a guide to help you with instructions for your car in the images below:
https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked
Please go over the ground connection as well and look for corrosion. Check out the images (below). Please let us know what happens.
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Sunday, February 4th, 2024 AT 6:19 PM