Hello-- I need the Forum knowledge once again! After searching the subject threads I still have a question. Awhile back, I did the hyperflash install/bypass due to the turn signals that weren't operating properly and a bad hazard light switch. Is it harmful to the vehicle electronics if I use the hyperflash with non LED lights for an extended period? I recently got the following codes and have never seen these particular codes before.

B2578 RF Turn Signal Monitor Circuit (Short to voltage)
B2583 LF Turn Signal Monitor Circuit (Short to voltage)

I greatly appreciate any information in reference to this. Thanks in advance!

 

So it sounds like you installed the hyperflash harness as you had LED's installed. Now the LED's were removed, harness remains, and you're getting the codes?

I would pull the harness out, clear the codes and go from there.

Good Luck.

 

Actually, I never had the LEDs. Did harness due to bad hazard switch. Thanks for the input-I'll try what you suggested though!

 

Let us know how it turns out.

 

Okay, today I went in and removed the hyperflash harness. The procedure went ok BUT I realized that there is a broken clip on the knee bolster that was removed. I am currently now searching vendors in attempt to get a replacement. The stealership advised me that the part is no longer available thru them. Other than that it went well. This time I'll wait until I actually purchase the LED lighting set up to put the hyperflash back in. At that same time, I'll most likely put in the replacement knee bolster if I can find one. Thanks for the interest and also the answer to my question. I appreciate the Forum!!

 

I don't think anyone ever answered your question. The Hyperflash unit will work with the OEM bulbs or LEDs. Does not matter which.

Are the codes H or C? You have to pull codes while the engine is running or they will show as H.

Sounds like you still need to resolve your turn signal issue if you remove the Hyperflash. I can post 3 other ways to do it besides the Hyperflash if you are interested.

Understand if the Hazard switch flasher goes bad then you will have no hazards with a Hyperflash unit. The unit is only good for turn signals.


Mr. Sam

 

Thanks a bunch Mr. Sam! Sure would appreciate it if you would post any additional info on the turn signals. I'll await your response!

 

Hopefully its not your turn signal unit! I used to hear horror stories about them going out.

 

I will when I return home.

What is the status of your turn signals with no Hyperflash unit installed now?

Need you to check on those codes, H or C.

Marc at VetteNuts.net should have the knee bolster help for you.


Mr. Sam

 

Thanks Mr. Sam! Turn signals are still intermittent. Most likely the Hazard Switch I believe. Ran codes and all clear from the original codes. I contacted Marc about the bolster. He said he has a nice one to just come in so I will purchase it. As a matter of fact, Marc has a hazard switch on his site--I may pick that up and try install myself. Do you know happen to know how hard it is to install hazard switch? Hey, I appreciate the follow up. I know everyone is busy these days!

 

Here is the info, let me know if you have any questions.

Here are 4 ways to fix a turn signal Hazard switch issue.

1. Remove the console and radio surround bezel and remove and replace the Hazard switch. Cost about $25 for a new switch and can be done in about 1 to 1 1/2 hours. Very easy to do, not hard or really complicated.

After removing the console and radio bezel you need to remove the radio. If you look at your replacement switch you will see the 2 green tabs on the top and bottom that lock it in place. You will be able to see the lower one when the radio is removed. Push up on the lower tab with a screwdriver while pressing in on the lower part of the switch and you can release the lower tab. Now the switch should be angled up on the end where the wiring connects. Now take a large flat bladed screw driver and place it at the top of the switch. Give the screwdriver a swift rap with a hammer. DON’T overdo it, just a reasonable hard hit and the switch will just pop out.

How to remove the console and bezel for access to the radio:

http://www.vetteessentials.com/instr...zel_howto.html

If you have a manual transmission you can totally remove the radio bezel very easily to allow better access. No need to remove the shifter ****. Just pop the shifter boot loose and rotate it and it will allow you to lift the bezel up and over the shift boot and shifter ****.

2. Buy a Hyperflash unit for about $65 and install it under the dash. Just requires removing the Knee bolster. About a 1/2 hour job.

3. Buy a used wiring harness that goes from the steering column to the hazard switch. Remove the knee bolster and unplug the existing one and install the replacement. Then install the new Hazard switch on the other end and just place it under the ignition switch where you can access it if you ever need Hazards. Dash will look stock since the old bad switch is still there. Cost is 25$ for switch and about $25 for a used harness. Takes the same time as installing a Hyperflash unit.

Here is info on the wiring harness:

GM P/N 12163776

http://www.corvetterecycling.com/product-p/233776.htm


Mr. Sam

 

Thanks a bunch--it is greatly appreciated!!

By the way, connected with Marc at VetteNuts and ordered both the hazard switch and also the Knee bolster. Just awaiting delivery now. Will give you update as to how it all comes out!

 

I am providing an update to what is happening with the repair. First of all thanks to the Forum and those who helped me out with info etc. I purchased the knee bolster from a Forum vendor. I also picked up the hazard switch. I will tackle that job at a later date. I replaced the bad knee bolster with the new one and it went in pretty easily. I was just careful not to break the clips! I put the Hyperflash harness back in at this time as well. Actually, what was causing the electrical problem was a near dead Optima Red Top battery that I bought in 5/2014. I never would've thought of a battery problem with such a "semi-new" battery. I took it to Advance auto, they checked it and advised it had like only 45 CCA not the 700 CCA or other it should have. It was not handling the electrical load at all and that was creating the problems I was having with my turn signals freezing etc. Shout out to Optima Batteries as they sent a replacement to me within days!

The job is done now (everything is working well). I will relax and check out the Kentucky Derby! Thanks again to Mr. Sam--I will hold the information and use it when I do the hazard switch.

 

Thanks for posting your issues and fix... great for all of us to learn...
LOW VOLTAGE and BAD GROUNDS cause ALL kinds of issues for the C5 corvettes...

 

I was having turn signal issues, sometimes working , sometimes not. Had the passenger side widow regulator/motor replaced when window quit working and now the side effect is that the signal issue disappeared. you never know about the affect/effect the electrical gremlin's cause in this car but I love it....