Left turn signal and brake lights are not working?

Tiny
CGRANA2JR
  • MEMBER
  • 2012 CHEVROLET EXPRESS
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
So, I have an issue that my turn signal or left brake light does not turn on. I replaced the fuse for BCM5 but as soon as I lower my turn signal as if I'm signaling left it blows the fuse also if I press on the brake, it blows the fuse. What wires can I check to see if it's shorted or can it be the BCM that's bad but I know once replacing the BCM it has to be programmed. I need help please.
Friday, August 9th, 2024 AT 8:47 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,567 POSTS
I don't think the BCM is shorted, more like the trailer wiring or the bulb/socket is melted, I would check out the wiring going to the trailer plug and remove the left side brake light/turn signal lens and remove the bulb for inspection this guide can help and I have included how to remove the lens/bulb for your car in the images below.

https://www.2carpros.com/articles/turn-signals-not-working-blinker

Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.
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Saturday, August 10th, 2024 AT 11:04 AM

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