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Old 07-03-2021, 05:26 PM #1
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LED Blinker Hyperflash

I know this has been asked a million times but I canít find an answer right now and my car needs to pass inspection soon. How do you get LED blinkers not to hyper flash. Iím assuming itís a resistance thing does anyone know if you can just put a resistor in the circuit to trick it what Ohm?
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Old 07-03-2021, 05:49 PM #2
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Originally Posted by domhanna View Post
I know this has been asked a million times but I can’t find an answer right now and my car needs to pass inspection soon. How do you get LED blinkers not to hyper flash. I’m assuming it’s a resistance thing does anyone know if you can just put a resistor in the circuit to trick it what Ohm?
You'll have use a hyper flash relay and install it on the back of the ecu by the driver door. Here is a video
https://www.youtube.com/watch?v=w8zLOE4Xgg8&feature=youtu.be

edit: LED turn signal "hyper flash" fix?

Last edited by spartacus; 07-03-2021 at 05:54 PM.
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Old 07-03-2021, 05:57 PM #3
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CF 18 flasher

Install a LED turn signal flasher (CF 18). The pic says Subaru but Toyota uses the same flasher / relay.
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Old 07-03-2021, 06:12 PM #4
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On my Civic I have a Sylvania Resistor installed ($15) and spliced both ends - one to the ground and the other to the blinker. It's still working fine and the blinkers work great.
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Old 07-03-2021, 06:16 PM #5
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I used this relay from Napa when I installed LED blinkers and it does work. No more hyperflash.
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Old 07-03-2021, 06:58 PM #6
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Swap the relay, skip the resistors.

With bad luck, a hot resistor can start a fire... I've bought a bike that suffered that fate to use it as a track bike. Nevermind that it's just a sloppy way to fix the problem.
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Old 07-04-2021, 09:28 AM #7
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Quote:
Originally Posted by LV2001BI View Post
Install a LED turn signal flasher (CF 18). The pic says Subaru but Toyota uses the same flasher / relay.
3rd-gens don't use CF18s, those are for 4th-gens.
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Old 07-04-2021, 09:56 AM #8
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Quote:
Originally Posted by Brian. View Post
Swap the relay, skip the resistors.

With bad luck, a hot resistor can start a fire... I've bought a bike that suffered that fate to use it as a track bike. Nevermind that it's just a sloppy way to fix the problem.
The other problem with most resistors is folks simply hack them into the wiring harness. Although it may cure the hyperflash issue, it opens the door to all sorts of (generally more serious) electrical issues down the road.
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Old 07-04-2021, 10:39 AM #9
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I would do a little more than run a single, tiny LED for a turn signal, that doesn't seem very safe
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Old 07-05-2021, 12:52 PM #10
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I used a adjustable flasher relay has knob on relay you turn to match load. 3 yr so far.
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Old 11-09-2021, 03:54 AM #11
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Decoder

You can try to use the resistance decoders to solve the problem of light bulb flickering
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Old 11-12-2021, 08:54 PM #12
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How should the resistors be wired? Thank you.
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Originally Posted by Too Stroked View Post
The other problem with most resistors is folks simply hack them into the wiring harness. Although it may cure the hyperflash issue, it opens the door to all sorts of (generally more serious) electrical issues down the road.
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Old 11-13-2021, 05:06 AM #13
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LED Blinker Hyperflash

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Originally Posted by Sparky 97Runner View Post
I used this relay from Napa when I installed LED blinkers and it does work. No more hyperflash.

Back in the 90ís they were just called electronic flash relay. My 94 ram had one factory because of the trailer lights. They are loud when in use.

I used one on (spare from my truck) my motorcycle XL600 enduro when I canned the factory stalks for bark busters with built in led turn signals. Worked great


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Last edited by 19963.4lsr5; 11-13-2021 at 05:09 AM.
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Old 11-23-2021, 10:22 PM #14
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Although these led bulbs are Canbus free for most vehicles, they may not be compatible with Dodge, Jeep, Chrysler, etc extremely sensitive vehicles. It's a headache for all the sellers at present, the issue may be solved by adding load resistors, but not 100%.
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Old 11-24-2021, 07:03 PM #15
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i think that now most LED lights are better.now i also know that there is cheap crap out there.....not only the bulbs but the flashers.
i switched all my exterior bulbs to led....well not head lights. Bulbs that many said were good to go. I also used a flasher relay rated for led's...from amazon...cheap.
i did not get hyper flash after that.....but I got an issue where if I stepped on brake ped that both rear turn signals light up dull but also on dash. here on the forum it was suggested I had a bad ground. I went through it all. then one day a member here said dont trust cheap flasher relays. so I went and got one from napa for LED's.....well other than the pain in the butt location for the relay....that fixed my issue.
all the realys come from china i bet...but then there is a better version...and a cheap as cr*p version. same with bulbs.
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