Left turn signal and brake lights are not working?

2012 CHEVROLET EXPRESS

250,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC

CGRANA2JR

MEMBER
1 POST

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.

Aug 9, 2024 at 1:47 PM

STRAILER

✓Experienced Mechanic
55,112 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

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Aug 10, 2024 at 4:04 AM