Truck has to be jump started everyday

2003 LINCOLN NAVIGATOR
155 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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DEXTER SANDERS
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  • 1 POST
My truck runs fine, but when i park it for 8 hours or longer i have to jump start. It just recently started doing it everyday. It would only happen on the weekend when i wouldn't drive it for a day. Now it's happening daily.
Oct 18, 2019 at 11:29 AM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
Welcome to 2CarPros.

It sounds like either the battery is weak or there is a parasitic draw. I am going to supply a few links to help you do some basic testing. The first link shows ow the do a basic load test. Do this when the battery is good and will restart the engine.

Before doing anything, make sure the battery terminals are both clean and tight. I have seen conditions where the jumper cables would tighten the terminal enough to allow it to start.

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Next, here is the load test.

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

Here is the link to help find an electrical draw:

https://www.2carpros.com/articles/car-battery-dead-overnight

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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

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

Let me know if any of this helps or if you have other questions.

Take care,
Joe
Oct 18, 2019 at 9:09 PM