Installed LED taillights. Hyperflashing help.
Thread Starter
Melting Slicks
Joined: Aug 2007
Posts: 2,583
Likes: 415
From: Erwin, NC
Installed LED taillights. Hyperflashing help.
Hi everyone!
Everything on the front of my car is LED. I have a hyper flash relay installed. It was working fine.
I just installed LEDs in my taillights and I’m getting hyper flash again.
Do I need a second relay? Where would I plug it in?
Everything on the front of my car is LED. I have a hyper flash relay installed. It was working fine.
I just installed LEDs in my taillights and I’m getting hyper flash again.
Do I need a second relay? Where would I plug it in?
Race Director
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From: The Sunshine State
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I would try a new hyper flash relay under the steering column before installing resistors. I have a full exterior LED/HID setup and had to change out an aging hyper flash harness a couple of years ago when I swapped out my Halo tail lights to the Vette Lights laser tail lights.
Resistors generate a lot of heat and I didn't like that especially close to other wires, plastic trim, etc.
Resistors generate a lot of heat and I didn't like that especially close to other wires, plastic trim, etc.
Melting Slicks
Joined: Feb 2025
Posts: 2,107
Likes: 2,027
From: THE BEACH..
The LED Circuit is 12 volts and barely any amps, how much heat do you think a resistor will generate? I really want to know from your experience what you melted, compared to buying something not necessary because people will spend money on anything.
It's an LED, look up how much they draw. FWIW some of us do specialized electronics for a job, just sayin...
It's an LED, look up how much they draw. FWIW some of us do specialized electronics for a job, just sayin...
Thread Starter
Melting Slicks
Joined: Aug 2007
Posts: 2,583
Likes: 415
From: Erwin, NC
I would try a new hyper flash relay under the steering column before installing resistors. I have a full exterior LED/HID setup and had to change out an aging hyper flash harness a couple of years ago when I swapped out my Halo tail lights to the Vette Lights laser tail lights.
Resistors generate a lot of heat and I didn't like that especially close to other wires, plastic trim, etc.
Resistors generate a lot of heat and I didn't like that especially close to other wires, plastic trim, etc.
Instructor
Joined: Apr 2021
Posts: 245
Likes: 88
From: Mobile
My hyperflash came withit's own flasher (not yet installed) but I have a spare variable one from when i bought a pair for my motorcycle's hyperflash leds. You can set it to any tempo in a range.
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Racer
Joined: Apr 2011
Posts: 428
Likes: 25
From: Tulsa OK
I have LED lights all around including my headlights. I installed a hyperflash relay that goes between the circuit leading to my emergency blinkers button. The only downside is when I hit the emergency blinker button I get a fault code but not a huge deal, clear it and move on since I rarely use the flashers.
Pro
Joined: Jan 2001
Posts: 646
Likes: 345
From: San Jose CA
I had to do resistors on my C5 when I did the rear tails. Had been running from LED's and headlights for a year with a hyper flash module. Something about the rear tails requires more resistance.
That said, the resistors for the rear cost <$10/pair and take less than 30 min to install start to stop
That said, the resistors for the rear cost <$10/pair and take less than 30 min to install start to stop
Race Director
Joined: Jul 2008
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From: The Sunshine State
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Race Director
Joined: Jul 2008
Posts: 17,767
Likes: 3,695
From: The Sunshine State
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
C7 of the Year - Modified Finalist 2021
Finalist 2020 C7 of the Year -- Modified
2020 C5 of the Year Finalist - Modified
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The LED Circuit is 12 volts and barely any amps, how much heat do you think a resistor will generate? I really want to know from your experience what you melted, compared to buying something not necessary because people will spend money on anything.
It's an LED, look up how much they draw. FWIW some of us do specialized electronics for a job, just sayin...
It's an LED, look up how much they draw. FWIW some of us do specialized electronics for a job, just sayin...
https://www.vette-lights.com/product...7QDdsSxTYpgNO-
Melting Slicks
Joined: Feb 2025
Posts: 2,107
Likes: 2,027
From: THE BEACH..
Not sure the temperature of the heat generated Mr. Science, however Vette Lights even suggested the hyper flash harness and not mounting the resistors to plastic or near other wiring so I took their advice...
https://www.vette-lights.com/product...7QDdsSxTYpgNO-
https://www.vette-lights.com/product...7QDdsSxTYpgNO-
It's ok, we all do different things.
Race Director
Joined: Jul 2008
Posts: 17,767
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From: The Sunshine State
2022 C5 of the Year Finalist - Modified
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Finalist 2020 C7 of the Year -- Modified
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Melting Slicks
Joined: Feb 2025
Posts: 2,107
Likes: 2,027
From: THE BEACH..
Couple other guys said resistors also, go mess with them too hero.. 
We gave a solution that isn't overpriced, then again if you don't have knowledge well you better have money I guess.
No validation needed here. I build stuff not buy it.
We gave a solution that isn't overpriced, then again if you don't have knowledge well you better have money I guess.
No validation needed here. I build stuff not buy it.
Race Director
Joined: Jul 2008
Posts: 17,767
Likes: 3,695
From: The Sunshine State
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
C7 of the Year - Modified Finalist 2021
Finalist 2020 C7 of the Year -- Modified
2020 C5 of the Year Finalist - Modified
C5 of Year Finalist (appearance mods) 2019
2018 C5 of Year Finalist
I'm loaded. $75 hyper flash harness vs. $25 in resistors. Gotta pay to play I guess.I'm just surprised how any of us got anything done here before February, 2025. Seriously, thanks for everything. My life is changed for the better.
Melting Slicks
Joined: Feb 2025
Posts: 2,107
Likes: 2,027
From: THE BEACH..
You have no clue who I am in the car community. When you un-*** your head, you'll figure that out. Surf through LS1Tech, get back to me. Been wrenching on stuff much more than you been buying it.
End of the day, guy asked for advice and several of us interjected. You said your piece because of what you read on the internets and I called it out with real world experience. That hurt your feelings apparently.
It's ok, if you never done it you just have to say that. Learn something new every day. You don't have to be big mad.
Last edited by the_merv; Mar 16, 2025 at 11:30 PM.