Left rear turn signal not working

Tiny
BAGARUS1
  • MEMBER
  • 2009 CHEVROLET MALIBU
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
The left rear turn signal is not working. It is a dual purpose bulb and I replaced the bulb after noticing it doesn't work. The two front signals work properly as well as the right rear turn signal. They both light up when brake applied and while running lights on. Checked fuse and it appeared to be fine. What are my options?
Wednesday, August 7th, 2019 AT 7:20 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome to 2CarPros.

Does the left signal flash fast? What I need to know if the vehicle has the LZ package or not. Also, using a test light, probe the blue wire at the light socket to see if there is power. You may just have a faulty socket or the problem could be related to the logic module.

I attached a picture from the schematic of the vehicle. The brown wire is powers the element in the bulb for the parking lights. The blue is for brake lights and signal lights. Being the brake light works on the left side, that tells me the ground is good and the bulb. Which leads me to the logic module which is part of the body control module. However, I need to know if terminal A on the plug (blue wire in picture) is getting power when the signal is on.

Here are a few link that you may find helpful when checking:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if I can help or if you have other questions. I will watch for your reply.

Take care,
Joe
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Thursday, August 8th, 2019 AT 8:54 PM
Tiny
BAGARUS1
  • MEMBER
  • 3 POSTS
It is the LT. I just replaced the pigtail for the rear left light today. Still not working. The brake light and turn signal is no longer working but the running light is. I think that is what its called. The bulb light up. Just wont light up when brake applied and turn signal.
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Friday, August 9th, 2019 AT 6:42 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome back:

Were you able to check to see if there is power to the wiring? Also, what wiring did you replace? Was it only for the light socket? And the brake lights worked before but don't now?

Let me know.
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Friday, August 9th, 2019 AT 8:02 AM
Tiny
BAGARUS1
  • MEMBER
  • 3 POSTS
I replaced the wiring harness that goes directly to the bulb itself. I started chasing wires and discovered a loose wire leading to the spoiler. After replacing it everything is in working order for now. The previous owner installed an after market spoiler with a brake light on it. Its working as well as the left brake light/turn signal.
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Friday, August 9th, 2019 AT 8:05 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome back:

Great. I'm glad you found the issue. Take care and let us know if you have questions in the future.

Take care,
Joe
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Friday, August 9th, 2019 AT 8:50 AM

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