Turn signal
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,667
Agree with Monty. It's not always the case, but it usually is. OP, try pushing your 4 way button on and off while turning, or in the driveway, somewhere safe you can monitor a change, if any. The main problem with the 4 way switch (next to being in a HELLACIOUS location to R&R), is its never used. Like anything else, if you never use it, sooner or later, it will go bad.....
Burning Brakes
Joined: Oct 2018
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From: Göteborg, Sweden, Europe
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@jhog01 If it is, get my advice, do NOT replace the hazard switch, the aftermarket available are worse than the original and will force you to remove the mess a second time to place back the OEM, the Dorman failed after 20h. Just buy an hyper flash harness, and install it, it takes 1/4 of the time and is solving the problem.
TCFS
TCFS
Le Mans Master
Joined: Dec 2017
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From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
I agree that a hyperflash harness is much easier to install. However, I've never heard of that solving the issue of a bad hazard switch.
Burning Brakes
Joined: Oct 2018
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From: Göteborg, Sweden, Europe
2025 C5 of the Year Finalist - Unmodified
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I replaced mine by a Dorman, which failed, also on the hazard after 15-20h. I was forced to go back with the OEM I kept, and hyper flash harness. The hazard function works from the hazard switch and the turn signal function works from the hyperflash harness from Sharp Light Innovation.
This is what I wanted to express.
sorry for the confusion and thank you for noticing, which pushed to have a better explanation.in my case, I could say only - for now - the turn signal function of the hazard switch was going bad.
TCFS
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Safety Car
Joined: Jan 2019
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From: Somewhere, Florida
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If you go LED turn signals, you will need the hyperflash harness no matter what.
I have the laser LED front turn signals, currently offered for sale from Vette Lights and am really pleased with them.
I have the laser LED front turn signals, currently offered for sale from Vette Lights and am really pleased with them.
Safety Car
Joined: Feb 2013
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From: Greensboro Nc
The only downside to the hyperflash harness is if you’re a weirdo like me and really like the OEM old school flasher sound you lose that. The hyperflash harness has that more modern sounding turn signal noise
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