Analyzing Hyperflash
Thread Starter
VETERAN
Joined: Oct 2015
Posts: 592
Likes: 57
From: Dayton OH
2025 C5 of the Year Finalist - Unmodified
Analyzing Hyperflash
If a bulb or socket goes out/broken do all bulbs hyperflash ?? More to this story but fir now I'm curious about this issue.
Jim
Jim
Race Director
Joined: Apr 2007
Posts: 11,150
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From: South Western Ontario
If the load on the flasher is not high enough then the flasher goes to hyper flash mode. So, if a left turn signal bulb is out only the left turn signal would hyper flash. The right would not hyper flash because all the bulbs on the right are still there and loading the flasher.
Thread Starter
VETERAN
Joined: Oct 2015
Posts: 592
Likes: 57
From: Dayton OH
2025 C5 of the Year Finalist - Unmodified
Well, I tried to install switchback DRL with a resistor and it still hyperflashed the LED. If you insert the LED in the opposite way the dash lights go crazy. So I ordered a harness to stop that but I cut off the resistor and now all bulbs hyperflash, front and rear when turn signal lever is pressed down. WTH did I do ??
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
The stock flasher can't cause a single corner bulb to hyperflash.
And yes, if you put LED's in backwards you can get exactly what you saw. When it's in the socket backwards no harness can fix it.
And yes, if you put LED's in backwards you can get exactly what you saw. When it's in the socket backwards no harness can fix it.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
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From: OK
I'm guessing from your avatar and username you are military... so THANK you from one infidel to another for your service ..
Wait for the harness...
It just seems so simple... get an LED bulb plug it in and walaaaaa... nope, not in our C5 ... IT has to be complicated and confusing or it doesn't qualify.
Wait for the harness...
It just seems so simple... get an LED bulb plug it in and walaaaaa... nope, not in our C5 ... IT has to be complicated and confusing or it doesn't qualify.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 478
From: OK
Guess I just must have been lucky because I ordered a complete LED conversion kit and hyperflash harness from one of our Forum vendors, installed it all and not a problem since. Every outside light on the car is now LED and no problems at all.
Of course now that I have said that Murphy's Law dictates that when I next drive the car I will have all sorts of issues....
Of course now that I have said that Murphy's Law dictates that when I next drive the car I will have all sorts of issues....
Maybe I missed it but I thought the OP said he had ordered the harness... I assumed he hadn't gotten or installed it yet... hoping this will fix his issues... or that I miss understood
and then you will have to bail him out 
Thread Starter
VETERAN
Joined: Oct 2015
Posts: 592
Likes: 57
From: Dayton OH
2025 C5 of the Year Finalist - Unmodified
Well as things progressed I thought I'll start the car and pull the codes from the DIC. Everything is OK now. Very strange indeed. Thanks to all who responded, that's the greatness of this forum. helping one another.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 478
From: OK
Guess I didn't get what I intended across. Not surprising because at my age no one understands what I say anyway. I ordered a tried and tested solution on a C5 and NOT a "one size fits nothing" solution that has not been proven on a C5 and included no specific info for all the different applications that it doesn't fit without modification. 
well, that certainly cleared things up, you crack me up... did you order your harness from RadioFlyer?
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Thread Starter
VETERAN
Joined: Oct 2015
Posts: 592
Likes: 57
From: Dayton OH
2025 C5 of the Year Finalist - Unmodified
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 478
From: OK
