Turn signal wiring diagrams

Tiny
MRSHARP86
  • MEMBER
  • 2013 BUICK REGAL
  • 2.0L
  • 4 CYL
  • TURBO
  • 2WD
  • 73,000 MILES
Hello,

So the last time I posted a question on this forum, JoeTechPro nailed it on the first swing saving me hundreds from going with my dealers' findings. So, I'm back to ask another.

I replaced all my incandescent bulbs with LEDs in my 2013 Buick Regal maybe three or four months ago. Ever since then, I have been dealing with the all-too-common hyper blink issue resulting from my car's computer sensing the lower resistance/volts from the LED units. The constant-on bulbs have no issues (i.E. Brake, reverse lights, etc); however, my front/back blinkers will blink normal three times, then hyper blink thereon.

I bought in-line 50W ohm resistors intending to use those to stop the issue. But being a newer car, I found there to be possible complications given the three wires coming from my rear blinkers, and I'm assuming probably front ones too. I also read that these can get very hot, so mounting them becomes complicated as well.

I thought about using an aftermarket turn signal relay to simply plug in, but I want to make sure the next solution I purchase will work before I press go on it. I'm somewhat familiar with the under-hood fuse box in my Buick thanks to my last question Joe answered for me; however, I can't determine which relay is for the blinkers - if there's even one at all (vs. A light control module or something else like that).

Can you please point me to the best solution to get my LED turn signals to stop doing their hyper thing? Thanks in advance!

- Landon
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Sunday, March 31st, 2019 AT 9:12 PM

3 Replies

Tiny
KEN
  • ADMIN
Hello,

The flasher days are over on newer cars it is controlled by the BCM. I would not try to install LED bulbs because the BCM is designed to work with regular bulbs. I don't want to connect some kind of resistor because you can blow out the BCM. Here is a wiring diagram for the blinker so you can see how the system works. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Yes JoeTechPro is one of our best! I will see if he wants to chime in on this one.
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Tuesday, April 2nd, 2019 AT 11:54 AM
Tiny
MRSHARP86
  • MEMBER
Hey there Ken,

Thanks for the reply, you aren t lying, look at all that complexity! Technology is great; however, not being able to work on my own car very much anymore is definitely one of the drawbacks. I guess I ll either let the hyper flashing continue and deal with it, or switch the bulbs back to the old fashioned ones. Have a good one!
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Tuesday, April 2nd, 2019 AT 4:14 PM
Tiny
KEN
  • ADMIN
Use 2CarPros anytime, we are here to help. Please tell a friend.
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Wednesday, April 3rd, 2019 AT 10:07 AM

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