Help with turn signals
Thread Starter
Racer
Joined: Oct 2006
Posts: 401
Likes: 79
From: Sidney Ohio
Help with turn signals
While out on a drive, my left turn signal started flashing fast. When I got home, I checked all the bulbs and they were all working with just the left still flashing fast. I have standard bulbs everywhere except I have VetteLights Flashbacks in the front. I've had them for years without a problem. Where do I start to look?
Le Mans Master
Joined: Dec 2017
Posts: 5,641
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From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
Could be your hazard switch is starting to go bad since none of your lights are out and you've never had this issue after years with the Vettelights setup, I would start with the hazard switch.
Heel & Toe
Joined: Feb 2016
Posts: 17
Likes: 1
Do you have a hyper flash harness installed? Do you have LED lights? My hazard went bad, sometimes my turn signals wouldn’t work at all. I had to press the hazard a few seconds then the turn signal would work. Your fast flashing might due led lights.
Last edited by Marco88; Jun 14, 2026 at 12:39 AM.
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Le Mans Master
Joined: Dec 2017
Posts: 5,641
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From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
I agree that LED headlights without a hyperflash harness could cause this issue. However, since he's had the same lighting setup for years without this issue, I think it's unlikely.
Safety Car
Joined: Mar 2017
Posts: 3,774
Likes: 940
From: Orlando Florida
Pretty classic hazard switch symptom. Try cycling the switch a good number of times — twenty or more would not be excessive. See if it makes any difference. Has been known to clear the symptom temporarily.
