Has no power

Welcome to 2CarPros.

Have you checked the battery and the alternator? Even if the battery is good, if the alternator doesn't keep it charged the engine will drain power from the battery. Also, make sure the battery terminals are clean and tight.

Here are a few links that explain how to first load test the battery and then how to check alternator output. They are easy to do, but the alt test will require the use of a volt meter or multi meter.

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https://www.2carpros.com/articles/car-battery-load-test

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

Here is a link that shows how to use a volt meter.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Let me know what you find or if you have other questions.

Take care,
Joe