High current draw with ignition off

Tiny
LEE1947
  • MEMBER
  • 2005 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 37,795 MILES
What can I do? The battery just goes dead?
Monday, March 29th, 2010 AT 9:06 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

You could high current draw or parasitic draw on the battery due to any number to faulty electrical components. It could be a glove box light staying on to a shorted window switch etc.

You will have to use a multimeter to see what is the current drain on your battery. This vehicle should have 25 milliamp or less parasitic draw.
If the draw exceeds that then it is considered excessive.

Here is a helpful video of how to check for parasitic draw:

https://youtu.be/z5F7WpgjaRs

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

Please let me know of any questions.
Thank you.
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Monday, October 4th, 2021 AT 9:26 AM

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