Battery drains when not running?

BUYRITEAUTO21

MEMBER
2010 TOYOTA SIENNA
3.3L
6 CYL
2WD
162,000 MILES

I have the vehicle listed XLE. It has a lot of features upgraded from the base model like navigation, DVD player, heated seats, remote start and power lift gate. When the van sits for several hours, sometimes the battery is drained. Are these extra features draining the battery when not running?

Thank you

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,968 POSTS

Yes, they could be if they are not wired up correctly, please follow this guide to get us started on finding out the problem, if the power leads for the accessories are easy to get at, I would start by removing them.

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

Please go over this guide and get back to us.

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Tuesday, July 25th, 2023 AT 7:11 PM

BUYRITEAUTO21

MEMBER
28 POSTS

Where would I find the power leads for the accessories? I’m not sure if this could contribute to the battery dying but I also have an anti-theft red light that always blinks when the vehicle is off, and the power sliding doors do not work. Also, would simply removing the fuses for any of the accessories reduce battery drain?

Thank you

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Wednesday, July 26th, 2023 AT 6:28 AM

KEN L

MASTER CERTIFIED MECHANIC
42,968 POSTS

How old is the battery it could be bad which causes a drain like symptom. If you don't know please charge the battery completely and then do a battery load test, this guide can help:

https://www.2carpros.com/articles/how-to-charge-your-car-battery

and

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

This is how to change the battery out in case you need it. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Check out the images (below). Please let us know what happens.

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