Hyperflash question for those with LEDs.
Thread Starter
Race Director
Joined: Oct 2004
Posts: 13,554
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From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
Hyperflash question for those with LEDs.
I changed all my lights to LED and installed a hyperflash bypass made by Corvette Envy.
My lights do not hyperflash now with turn signal use, but my hazards do.
Does the fix not bypass the hazard switch all together ?
I can hear the factory relay come on with the hazards and it does hyperflash, where the bypass relay comes on with the turns signals and no hyperflash.
Is that normal ?
My lights do not hyperflash now with turn signal use, but my hazards do.
Does the fix not bypass the hazard switch all together ?
I can hear the factory relay come on with the hazards and it does hyperflash, where the bypass relay comes on with the turns signals and no hyperflash.
Is that normal ?
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
I changed all my lights to LED and installed a hyperflash bypass made by Corvette Envy.
My lights do not hyperflash now with turn signal use, but my hazards do.
Does the fix not bypass the hazard switch all together ?
I can hear the factory relay come on with the hazards and it does hyperflash, where the bypass relay comes on with the turns signals and no hyperflash.
Is that normal ?
My lights do not hyperflash now with turn signal use, but my hazards do.
Does the fix not bypass the hazard switch all together ?
I can hear the factory relay come on with the hazards and it does hyperflash, where the bypass relay comes on with the turns signals and no hyperflash.
Is that normal ?
Advanced
Joined: Oct 2017
Posts: 85
Likes: 27
From: Cape Cod, MA
2018 C5 of Year Finalist
I’m pretty sure my 01 doesn’t hyperflash with hazards and I have all led lighting with a hyperflash unit
Unless I’m just not noticing the “hyperflash” when I push the button.
Unless I’m just not noticing the “hyperflash” when I push the button.
Last edited by lavaheadache; May 19, 2018 at 08:47 PM.
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I do not believe my hazard flashers hyperflash either, but I'm not home to check them.
Anyway, moving this to C5 Tech.
Anyway, moving this to C5 Tech.
Drifting
Joined: Nov 2016
Posts: 1,660
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From: SF Bay Area
Hyperflash harness does not bypass the hazard flasher function. LEDs without resistors will cause hyperflash with hazard, and is expected. Also, bad LEDs will not cause hyperflashing. The LED flasher does not care whether it is LED load, halogen load, or no load. It will flash at the same rate regardless.
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Safety Car
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Hyperflash harness does not bypass the hazard flasher function. LEDs without resistors will cause hyperflash with hazard, and is expected. Also, bad LEDs will not cause hyperflashing. The LED flasher does not care whether it is LED load, halogen load, or no load. It will flash at the same rate regardless.
Thread Starter
Race Director
Joined: Oct 2004
Posts: 13,554
Likes: 1,347
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
I have red LEDS in the stock taillight housings and switchbacks in the front. It did not start hyperflashing until the switchback install. The LED taillights were first installed and the hazards did not hyperflash.
Note that all the bulbs work as they should. None are out.
Note that all the bulbs work as they should. None are out.
Thread Starter
Race Director
Joined: Oct 2004
Posts: 13,554
Likes: 1,347
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
I can tell the difference also which relay is working. The Corvette Envy relay is much quieter.
Thread Starter
Race Director
Joined: Oct 2004
Posts: 13,554
Likes: 1,347
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
I have red LEDS in the stock taillight housings and switchbacks in the front. It did not start hyperflashing until the switchback install. The LED taillights were first installed and the hazards did not hyperflash.
Note that all the bulbs work as they should. None are out.
Note that all the bulbs work as they should. None are out.
Thread Starter
Race Director
Joined: Oct 2004
Posts: 13,554
Likes: 1,347
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
The stock flasher looks for the power draw of 3 halogen bulbs, regardless of whether it is in turn signal mode or hazard mode. In hazard mode prior to switchbacks, it was seeing the load of 2 halogens plus 4 LEDs, which was probably just enough to keep it from hyperflashing. Now it is only seeing 6 LEDs, which means it is expected to hyperflash. Everything is working as expected, there is nothing malfunctioning.
I sent them back to Amazon and reinstalled the orange 4157 that were in there( For now anyway). The Hyperflash is gone in either function although the taillights are still LEDs.
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
Hyperflash went away because the hazard is now seeing 5 LEDs plus 1 halogen. 3 halogens means it is looking for approximately 81 watts (technically more than about halfway between 54 and 81 watts, assuming 27 watt halogens). Assuming each LED bulb is about 10 watts, 60 watts would definitely trigger hyperflash. Putting one halogen back in increases load to 77 watts, which would not trigger hyperflash.
Le Mans Master
Joined: May 2006
Posts: 5,747
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From: Hillsboro Oregon
I recall about a decade ago when moving to LEDs was a new idea and nobody had created a hyper flash harness yet. One solution was to wire a regular bulb in the power line to provide resistance and reduce or prevent hyper flash. I never tried it, but it worked for many LED users on CF
Pro
Joined: Aug 2010
Posts: 622
Likes: 169
From: Montgomery Texas
I made my own bypass harness for the turn signals. They do not hyper-flash.
As already mentioned, the hazards are on a separate circuit. Technically speaking, my hazards do hyper-flash (they flash at a quicker rate than my turn signals), but they don't jump out at you as flashing abnormally fast.
Bottom line, if you are noticing a difference in the flash rate between the turn signals and the hazards, this is normal and characteristic for a car equipped with LEDs and a bypass harness.
As already mentioned, the hazards are on a separate circuit. Technically speaking, my hazards do hyper-flash (they flash at a quicker rate than my turn signals), but they don't jump out at you as flashing abnormally fast.
Bottom line, if you are noticing a difference in the flash rate between the turn signals and the hazards, this is normal and characteristic for a car equipped with LEDs and a bypass harness.
Advanced
Joined: Jun 2014
Posts: 82
Likes: 6
I made my own bypass harness for the turn signals. They do not hyper-flash.
As already mentioned, the hazards are on a separate circuit. Technically speaking, my hazards do hyper-flash (they flash at a quicker rate than my turn signals), but they don't jump out at you as flashing abnormally fast.
Bottom line, if you are noticing a difference in the flash rate between the turn signals and the hazards, this is normal and characteristic for a car equipped with LEDs and a bypass harness.
As already mentioned, the hazards are on a separate circuit. Technically speaking, my hazards do hyper-flash (they flash at a quicker rate than my turn signals), but they don't jump out at you as flashing abnormally fast.
Bottom line, if you are noticing a difference in the flash rate between the turn signals and the hazards, this is normal and characteristic for a car equipped with LEDs and a bypass harness.