Hi guys. I have an unusual turn signal problem. I installed a new 4 way flasher about 20,000 miles ago, because it went bad. I did the push 4 way deal for a couple years, got tired of it, and then put in the new 4 way. All good for awhile. Then the turn signals started hyperflashing. Bought a used multifunction switch that was in good shape. This fixed it, for a few months. Now, a totally new issue; the turn signals work great.....For a 1/2 hour to 45 minutes. It seems like when everything is fully warmed up, the hyperflashing starts again. I had a well known Corvette repair shop in Sarasota, Florida have a look at it. They removed all bulbs, which all checked out good. They also cleaned all the sockets, which were in pretty good shape also, because I never drive the car in Winter. If I'm driving at highway speeds, they seem to work right for a longer time, but eventually hyperflash. Around town, they start hyperflashing a bit sooner. No amount of pushing the 4 way changes this. I'd look into buying the anti hyperflash harness, but since they operate fine for 1/2 hour, or more, what would the harness do when they're flashing at normal speed, maybe flash super slow? These bulbs are all OEM incandescent bulbs, or whatever a 2000 C5 came with-NO LEDs. Could it be the used multifunction switch goes wacko when everything warms up? I hope not, because we all know it's a PITA to change, especially since I just did it last year!! Please help me out on this. Thanks guys......

 

Has anyone had this problem? Please help......

 

I'm starting to think my problem is so rare, I'm the only guy whose ever had the problem.....

 

Check the grounds and also the harness connectors for corrosion.

 

Harness connection is good. Plus they work fine, for 20 minutes to a half hour, 30 miles or so. I've cleaned all underhood grounds. Do you know a location for a ground that I may have missed, or a specific ground that may cause this specific problem? Thank you very much for helping out......

 

[QUOTE=DBS99MagRedCoupe;1602097256]Check the grounds and also the harness connectors for corrosion.[/QUOTE
Well, today I went on a 25 mile ride, for over 1/2 hour, made 3 stops, and neither left or right turn signal acted up!!!! I'm sure they will, because this is the first time in over a year they haven't screwed up. They ALWAYS do. Today was about 70° here, and less humidity. But they will screw up again, just a matter of time. Like NEXT time. I think I've tried almost everything. Out of ideas.....

 

ttt, anyone, PLEASE......

 

I wonder if it could be the ignition switch, I'm not sure if all power goes through the switch but burned contacts may be it as it causes a lot of other problems, just a thought.

 

Thank you for the reply.....

 

ttt anyone???

 

ttt..........

 

I would change the flasher and see if that fixes it, simple things first, could be on its way out and after warming up goes a little bonkers.

 

Woulda been better if you combined all your issues into 1 thread

 

? I'm confused about the combining you mentioned. I did combine them all in this thread. Please elaborate......

 

Back when my C5 was new, it developed an issue where if a turn signal was left "on" for any length of time, the flash rate would speed up until it was hyperflashing. Cured by a new hazard switch/flasher unit.

 

U have about 3 threads it and would have been nice if you had combined all the issue into 1 thread ...anyways turn signal issue are most likely at the socket it’s self replace it ...

Im confused as well as to people who buy a corvette a aged one at that and don’t have the slightest clue what’s happening with a malfunctioning car it’s not really rocket science...but when u give sarcasm U get it ....

 

You did check that ALL bulbs which should be flashing ARE flashing at full brightness when it hyper flashes?

If yes, just put a flasher bypass in it. Heck, do it cheaper and just cut the wires and install a flasher yourself.

 

This forum isnt for pissing matches. I'm looking for help. As I try to help others. I don't know what "sarcasm" you're referring to. If you took it that way, I apologize. It was not meant to be sarcastic. If you have something to contribute, do it. Otherwise, don't bother posting. I've owned my car for 17 years, and been a member here a long time. Since you have all the answers, start talking. If you wanna sling ****, U can do that, too. I stated in my post, I believe, that I've had the sockets and bulbs checked out, by C&S Corvettes in Sarasota, Florida. They've probably forgotten more about C5 Corvettes than both of us put together. By the way, that wasn't sarcasm, so you'll know.....

 

Thank you for responding. No, when the hyperflashing occurs, the fronts DO NOT flash, but the rears do. When everything is working correctly, say for the first 20 miles, all 4 corners flash correctly. It seems to be an unusual problem, at least to me. I know the car is getting old, just like me, but I bought it 17 years ago with only 20,000 miles on it, and I do want to keep it. I'm very adept mechanically, but now that it's starting to get the typical older C5.electrical troubles, it might be a better thing.to have my skill set reversed!!!

 

Could be in the switch.. usually hyper flashes are due to bulbs or sockets...but can be in the switch or switch relay....brake or 4 way module or relay whatever they put in these cars ..

Replace some fuses might work ...inspect them