Something keeps draining the battery?

KLEGGSKAA1

MEMBER
2009 CHEVROLET COLORADO
2.9L
4 CYL
2WD
AUTOMATIC
275,000 MILES

I hit a deer on passenger side I fixed all of that now something keeps draining the battery.

Monday, October 23rd, 2023 AT 3:48 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,942 POSTS

It is common for the A/C clutch relay to stick on and drain the battery, I would remove the relay to see if the drain stops. Please check out this guide as well:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Also, please check out this guide and I have included the location of the relay. Check out the images (below). Please let us know how it goes.

Image (Click to make bigger)

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Monday, October 23rd, 2023 AT 4:00 PM

KLEGGSKAA1

MEMBER
22 POSTS

We checked relay it is fine, what else can we try?

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Tuesday, October 24th, 2023 AT 6:58 AM

KEN L

MASTER CERTIFIED MECHANIC
42,942 POSTS

I would load test the battery, the jolt could have caused it to go bad. here is a guide to help you do so:

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

Please go over this guide and get back to us.

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Tuesday, October 24th, 2023 AT 8:23 AM