Radio draining battery?

Tiny
LUVENIA CLARK
  • MEMBER
  • 2014 GMC TERRAIN
  • V6
  • 2WD
  • AUTOMATIC
  • 81,000 MILES
Car wouldn't start and after boosting it started, however my IntelliLink screen went black. I drove to the mechanic and was told the radio was causing the battery to drain even when the radio was off.
Saturday, January 4th, 2025 AT 8:24 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,119 POSTS
It could be a control module not shutting down, did the mechanic do a CAN scan? This is what needs to be done to see what codes are stored. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is a guide that goes over the most popular reasons for the battery to drain down over night:

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

I have seen the Multi-media interference control module go out and cause this, but codes would be better. Please go over these guides and get back to us.
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Sunday, January 5th, 2025 AT 2:48 PM

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