How do I do a drain test?

Hello,

So just to clarify, the battery goes dead if you leave it overnight?
When the battery loses its charge in the morning you could have a voltage drain in the electrical system which is called a parasitic draw.

I have attached a step by step guide on how to find the parasitic draw and what to do to fit it.

https://www.2carpros.com/articles/car-battery-dead-overnight
https://www.2carpros.com/articles/car-battery-load-test
https://www.2carpros.com/articles/symptoms-of-a-bad-car-battery

You also might find this video helpful:

https://youtu.be/t4KNeFyORM0

Please let me know of any questions.

Thank you.