Turn signal when dark outside it blinks fast?

Tiny
MAILHANDLERJON#1
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  • 2016 CHEVROLET TRAVERSE
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 129,000 MILES
My right turn signal works fine during the day. But come dark it blinks fast. Does m sensor on top have anything to do with that and what can I do?
Saturday, June 28th, 2025 AT 11:48 PM

7 Replies

Tiny
KEN L
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I would turn all of the lights on at dark to see if any of the light bulbs/LED's are out. The control for the lighting come from the BCM. If all of the lights seem okay, you may have a BCM going out. We should do a CAN scan to see if any codes are stored. This video will show you how:

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

Please go over this guide and get back to us.
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Monday, June 30th, 2025 AT 10:41 AM
Tiny
MAILHANDLERJON#1
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I'm pretty sure I saw one light out of two on the bottom of the lights. I'll have to check it out during the day.
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Monday, June 30th, 2025 AT 10:25 PM
Tiny
KEN L
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Okay, if so, the next step is the CAN scan. The problem is only when it is dark correct? This would be internal programming inside the BCM.
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Tuesday, July 1st, 2025 AT 6:28 PM
Tiny
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For some reason no one seems to know where the bcm is or doesn't want to share. I do my work if I can reach it.
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Wednesday, July 9th, 2025 AT 4:58 PM
Tiny
KEN L
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Here is the location of the BCM under the dash on the left side, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below).
Image (Click to make bigger)
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+1
Wednesday, July 9th, 2025 AT 6:02 PM
Tiny
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I'm assuming that's just left of the steering wheel.
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Wednesday, July 9th, 2025 AT 9:56 PM
Tiny
KEN L
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Yes, that is correct, you will need to remove the knee bolster to get to it.
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Thursday, July 10th, 2025 AT 9:45 AM

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