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LED Hyperflash Question

Old Aug 8, 2014 | 12:24 PM
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I've been running my full HID/LED setup for two years. I have a hyperflash harness installed and everything has been working great.

However, today I noticed that when turning on my right turn signal, I received the hyperflash. I checked and there are no burnt out bulbs. When I turn on my left turn signal, it flashes as normal.

Anyone know what could be causing this? I have LED switchbacks in the front and the LED Halos in the back. Again, all bulbs are on and working correctly. I just get the hyperflash on the passenger side when I switch on the right hand turn signal.

Thanks!

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Old Aug 8, 2014 | 12:42 PM
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Can't help you with a solution, but perhaps JW Motoring or theradioflyer can give you some advice.
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Old Aug 8, 2014 | 12:47 PM
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Originally Posted by MSG C5
I've been running my full HID/LED setup for two years. I have a hyperflash harness installed and everything has been working great. However, today I noticed that when turning on my right turn signal, I received the hyperflash. I checked and there are no burnt out bulbs. When I turn on my left turn signal, it flashes as normal. Anyone know what could be causing this? I have LED switchbacks in the front and the LED Halos in the back. Again, all bulbs are on and working correctly. I just get the hyperflash on the passenger side when I switch on the right hand turn signal. Thanks!
I have halos in the rear also, with the built in load resistor on the back of each light. One of the load resistors fell off once and I had hyperflash on that side. Pull the right side lights and see if one of those resistors fell off the back
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Old Aug 8, 2014 | 03:20 PM
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Originally Posted by Vetteman Jack
Can't help you with a solution, but perhaps JW Motoring or theradioflyer can give you some advice.
Thanks. I purchased my LEDs from JWM so I will send him a PM if I can't fix the issue.

Originally Posted by Dcollins3208
I have halos in the rear also, with the built in load resistor on the back of each light. One of the load resistors fell off once and I had hyperflash on that side. Pull the right side lights and see if one of those resistors fell off the back
Thanks for the info. I will pull the rear halos and make sure that the load resister is still there. I don't remember how they looked when I first installed them, however I thought they were built into the unit. I wasn't aware they were separate and could fall off.
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Old Aug 8, 2014 | 03:27 PM
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Originally Posted by MSG C5
Thanks. I purchased my LEDs from JWM so I will send him a PM if I can't fix the issue. Thanks for the info. I will pull the rear halos and make sure that the load resister is still there. I don't remember how they looked when I first installed them, however I thought they were built into the unit. I wasn't aware they were separate and could fall off.
Attached is the best pic I could find, it's the little gray box on the back. What happens is over time the heat that they produce melts the plastic that the load resistor is screwed into, then it hangs freely and over time the wires separate from the unit. I bought new load resistors off eBay. If this is the case for you, let me know and I'll send you a link to what I bought, they're cheap.

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Old Aug 8, 2014 | 05:44 PM
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Weird issue.

Since you have the harness installed the load resistor issue shouldn't be the reason it is doing this. I'm not too familiar with this happening so it's still worth checking out.

If that checks out pull the harness. Make sure the connections are still solid. Maybe a connection came loose. If that looks good the top flasher piece may have failed. I can't recall any failing in the 5 years that we've sold those harnesses. It's possible though. The left side not flashing fast makes me believe this isn't the issue.

Last edited by JW Motorsports; Aug 8, 2014 at 05:46 PM.
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Old Aug 8, 2014 | 11:56 PM
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Originally Posted by JW@JWMotoring.com
Weird issue. Since you have the harness installed the load resistor issue shouldn't be the reason it is doing this. I'm not too familiar with this happening so it's still worth checking out. If that checks out pull the harness. Make sure the connections are still solid. Maybe a connection came loose. If that looks good the top flasher piece may have failed. I can't recall any failing in the 5 years that we've sold those harnesses. It's possible though. The left side not flashing fast makes me believe this isn't the issue.
Do you think a bulb that's about to fail could cause this? Or a failing fuse?
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Old Aug 9, 2014 | 02:45 AM
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I had a very similar issue and it was something faulty with the hyperflash harness. Same tail lights as well. I literally had to thump the harness to make it work again. Try fiddling with the hyperflash harness box while you have the fast turn signal on. Whack it a couple times and see if it goes back to click the normal speed with the lights. I'm still using the same harness and every once in awhile it'll start doing it again and I have to whack the bottom of my dash where the harness is to show it who's boss.
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Old Aug 9, 2014 | 07:48 AM
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Does it also do it when when you put the actual Hazards on?

I ask this since the circuit going to the front is different for Hazards and does not go through the MF switch.
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Old Aug 9, 2014 | 10:38 AM
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Originally Posted by vpshockwave
I had a very similar issue and it was something faulty with the hyperflash harness. Same tail lights as well. I literally had to thump the harness to make it work again. Try fiddling with the hyperflash harness box while you have the fast turn signal on. Whack it a couple times and see if it goes back to click the normal speed with the lights. I'm still using the same harness and every once in awhile it'll start doing it again and I have to whack the bottom of my dash where the harness is to show it who's boss.
The only thing I can think of is that I had a wheel alignment performed last week. Perhaps when the shop used the brake pedal/steering wheel alignment tool, they may have bumped the harness? I don't see how because I tucked it pretty well underneath the lower dash and will probably have to remove the lower dash in order to reach it. I also have the window valet installed, however I don't think that comes into play as it's been installed for over one year.

Originally Posted by dadaroo
Does it also do it when when you put the actual Hazards on?

I ask this since the circuit going to the front is different for Hazards and does not go through the MF switch.
The hazards tested fine. The only hyperflash I have is when I engage the right/passenger side turn signal.
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Old Oct 25, 2014 | 04:50 PM
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Update:

I fixed my hyperflash this afternoon. It turns out I just needed to install a new hyperflash harness. Apparently the one I installed back in 2010 just wasn't getting the job done anymore. I'm no electrical expert, however what's fixed is fixed. I tested all the lights, turn signals, hazards, etc. and all works fine.

I also purchased a separate hazard switch as the original seemed to be sticking and I thought that may be the issue as the turn signals pass through the hazard switch. I was planning to swap that out as well if the hyperflash was not fixed with the new harness, however I'm not going to replace it now as things are working again. I might however swap out the hazard switch next year if I upgrade my DD NAV head unit as I will need to remove the center console, bezel, and head unit anyway.

Time for a drive!

Last edited by MSG C5; Oct 25, 2014 at 04:52 PM.
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Old Oct 26, 2014 | 10:36 AM
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Could I get some info on the "Hyperflash Harness" and where it goes?? I installed some Adjure LED's on my C5Z and I am experiencing hyperflash issues. Thanks in advance for any help provided.............
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Old Oct 26, 2014 | 11:23 AM
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This might sound weird to some, but when I installed my switchback LED's up front I had the same issue and told myself, 'I'll fix it later'. The truth is I've grown to like it for the fact that driving in So. Cal freeway and street traffic it alerts my intent to change lanes NOW, general rule of thumb out here is if you signal for a lane change in rush hour(s) that means that someone will probably slam the door shut. I hate L.A. traffic.

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Old Oct 26, 2014 | 12:37 PM
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Originally Posted by MSG C5
Update:

I also purchased a separate hazard switch as the original seemed to be sticking and I thought that may be the issue as the turn signals pass through the hazard switch.
FYI, the individual turn signal circuits DO NOT go through the hazard switch. That info keeps getting spread on this forum but it is not true.

Once you install the flasher bypass the only circuit that passes through the hazard switch is the brake circuit for the left and right brakes.

You probably just had to replace the $10 flasher in the harness.
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Old Oct 26, 2014 | 04:18 PM
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Originally Posted by SDF
Could I get some info on the "Hyperflash Harness" and where it goes?? I installed some Adjure LED's on my C5Z and I am experiencing hyperflash issues. Thanks in advance for any help provided.............
The hyperflash harness is installed behind the driver's side knee bolster. You need to remove that first and then basically install the hyperflash harness in between the OEM harness connectors. Once installed, you simply stow the harness alongside the AC unit or behind the radio bezel wall.

Be careful when removing the AC sensor cover and rear hatch/fog light switch as they have delicate plastic tabs that can easily break. Other than that, you just need a #15 torx driver to remove the two screws at the bottom of the lower knee bolster and two screws behind the AC sensor cover and behind the hatch/trunk/foglight switch.

Forum vendor JW Motoring offers the hyperflash harness and includes instructions on how to install it. It only takes a couple of minutes with most the work being involved with removing the lower knee bolster.

Last edited by MSG C5; Oct 26, 2014 at 07:17 PM.
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