Battery drains overnight

Tiny
SHELBY5150
  • MEMBER
  • 2006 DODGE DURANGO
  • 4.7L
  • V6
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Every morning when I get in my car, I have to jump start it but then throughout the day it will start and stop just fine. Had the battery checked and it was 100%. Any suggestions on what to do or check?
Tuesday, January 11th, 2022 AT 12:01 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

You could have excessive parasitic draw (current drain) on the battery.
Every electrical circuit will have a certain amount of parasitic draw; however, it can become excessive due to any number of faulty electrical components. Like a glove box light staying on or a shorted-out window switch etc.

This vehicle should not have any more than 35 milliamp of parasitic draw.

In order to find out what is causing the drain you will have to use a multimeter and check the current drain on the battery, as you remove different fuses.

Here is a helpful video that shows exactly what to do:

https://youtu.be/z5F7WpgjaRs

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

I have attached the test procedure below as well.

Please let me know if you have any questions.
Thank you.
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Tuesday, January 11th, 2022 AT 12:39 PM

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