Blinkers on hyperflash

[NelliM60]

I had replaced the original standard light bulbs with Xenon HID lamps on the low and high beam headlamps. No problems. I switched the standard bulbs for dual color LEDs in the parking/flasher compartment and switched standard bulbs in the front yellow corner parking/flasher for LED bulbs. Problem: the right and left blinkers go on hyperflash but on hazard blinking, they go at normal controlled-flashing. Somebody please tell me what is going on. It does the same to the tail lights (which are standard bulbs), perhaps they're running in the same line. I went to a custom shop and the tech said he'd have to run a diagnostic review which is a per-hour service. Do I need to replace a relay / fuse or is it really that technical to figure out?
Thanks Guys.
('04 Chevy TB LS)

 

[xavierny25]

There are a few threads on this already if you do some searching. But here's what you will need to solve that issue or you can go the load resistors route which is a little more of a headache if you ask me.
https://www.amazon.com/gp/product/B001KS6GIG/?tag=gmtnation-20

 

[djthumper]

The problem is the LEDs that you put in. There is not enough resistance for the flasher.

 

[Mooseman]

and it thinks the bulbs are burnt out.

 

[jsheahawk]

and it thinks the bulbs are burnt out.

Yup.

 

[NelliM60]

There are a few threads on this already if you do some searching. But here's what you will need to solve that issue or you can go the load resistors route which is a little more of a headache if you ask me.
https://www.amazon.com/gp/product/B001KS6GIG/?tag=gmtnation-20

Thanks, that one is not compatible for my truck, according to Amazon, but it led me to an ACDelco GM replacement which does match. I just ordered it. Fingers crossed.

 

[Sparky]

As long as it is LED rated.

Don't trust Amazon's fitment guide. It is wrong half the time. For example, it says that module linked above is compatible with my Silverado, but it isn't because my pickup doesn't even have a flasher module. It is all done by the BCM on my truck.

 

[NelliM60]

As long as it is LED rated.

Don't trust Amazon's fitment guide. It is wrong half the time. For example, it says that module linked above is compatible with my Silverado, but it isn't because my pickup doesn't even have a flasher module. It is all done by the BCM on my truck.

Funny you said that. I just did a thorough inspection in the fuse box in the engine bay and under the rear seat and found not one relay that came remotely close to the one I ordered earlier. Just cancelled the order and holding off until I find the correct one.

 

[djthumper]

Check the one that X listed. That should be the correct one.

 

[Sparky]

The flasher relay is not in the fuse box. It is behind the driver side kick panel below the steering wheel.

 

[NelliM60]

Funny you said that. I just did a thorough inspection in the fuse box in the engine bay and under the rear seat and found not one relay that came remotely close to the one I ordered earlier. Just cancelled the order and holding off until I find the correct one.

It is. Just found it on the panel below the steering wheel. I was looking for a relay when I should've been looking for the resistor. X was on spot. Thanks All.

 

[shovenose]

Use Rockauto for part numbers then check on Amazon becuase sometimes they are cheaper there but yeah Amazon's fitment guide is total garbage.

 

[bullguy]

Open the flasher relay and disconnect one connection you will not have hyperflash
i have uploaded a pic you can see that clearly

 

[xavierny25]

Open the flasher relay and disconnect one connection you will not have hyperflash
i have uploaded a pic you can see that clearly

Really is that all it takes? I have my OEM part I think I'm going to give this a try. Thanks @bullguy

 

[bullguy]

Really is that all it takes? I have my OEM part I think I'm going to give this a try. Thanks @bullguy

yes i have tried and success,before i had resistors i removed and did this mod. you can just unsolder that leg of ic and push it up no need of damaging the PCB

 

[NelliM60]

yes i have tried and success,before i had resistors i removed and did this mod. you can just unsolder that leg of ic and push it up no need of damaging the PCB

I was attempting this morning...no dice, the snowfall started covering everything inside the truck I'll give it a shot tomorrow.

 

[Blckshdw]

I was attempting this morning...no dice, the snowfall started covering everything inside the truck I'll give it a shot tomorrow.

Disconnect the module from the truck, and mod it in the comfort of a warm house.

 

[07TrailyLS]

Curious to know if this mod works. Definitely keeping posted

 

[Blckshdw]

Curious to know if this mod works. Definitely keeping posted

I don't see any reason the doubt him, if he's currently running the mod on his truck. This type of mod was discussed a few years back when a few of us bought the LED flasher module around the same time. Some of the more electrically experienced members started tinkering with the OEM modules to see if there was a way to save a few $$$ There was one guy who confirmed the trace cutting mod worked, and I think there was another that installed a jumper somewhere, that also worked.

yes i have tried and success,before i had resistors i removed and did this mod. you can just unsolder that leg of ic and push it up no need of damaging the PCB

 

[07TrailyLS]

If it's that easy, why do most spend the 90 dollars on the updated flasher module.

 

[xavierny25]

Who spent $90? I paid under 35 for the module.

 

[Sparky]

But modding the original is free!

Had I realized you could do that I would have not bothered with the resistors up front on my 02. Oh well.

 

[advcomp2019]

I thought LM487 had some type of issues with cruise control. Then, I thought you needed LM486 if you want did not want hyperflash and other issue. http://www.rockauto.com/en/moreinfo.php?pk=3942522&cc=1401275&jsn=407

There is just too much different info that it could confuse someone.

 

[bullguy]

Posted this video of my Flasher

https://vid.me/8jwO

 

[bullguy]

This is the original OEM blinker module after modification and its working perfectly fine, now its almost 3 years i have done this mod,even the cruise control is working fine without any problem.
Thanks

 

[NelliM60]

Well, I didn't modify the relay under the wheel because I don't know the first thing about smoldering (I'd probably burn the whole truck up). However I did buy a pair of resistors which were easy installs. It solved the hyperflash problem indeed. It also disabled the drl feature. I've got yellow flashers, but the bluish-white daytime running lights are not coming on. I have seen many posts from people who want to disable their drl's for various reasons, but I love mine and want them running. They make my Street Queen look sexy at night with her new bluish-white hid headlights. Anyone have suggestions. I don't think our trucks have fuses for drl's. I've looked in the hood and rear fuse boxes.

 

[Sparky]

Resistors on the signal bulbs should have no effect on the headlamps because they are totally different circuits.

 

[NelliM60]

Resistors on the signal bulbs should have no effect on the headlamps because they are totally different circuits.

The headlamps are fine. The daytime running lights which run on the same bulb as the flashers are not working. The drl's stopped working after I installed the resistors.

 

[Blckshdw]

The headlamps are fine. The daytime running lights which run on the same bulb as the flashers are not working. The drl's stopped working after I installed the resistors.

I think you're talking about the parking/running lights. DRLs are run through the low beams. When you hooked up those load resistors, they should be connected like the 2nd image. Without seeing your setup, I'm guessing you have a connection on the wrong wire, maybe turn signal and running light, instead of ground.

 

[NelliM60]

I think you're talking about the parking/running lights. DRLs are run through the low beams. When you hooked up those load resistors, they should be connected like the 2nd image. Without seeing your setup, I'm guessing you have a connection on the wrong wire, maybe turn signal and running light, instead of ground.

Yes you're right. I'm sorry for the using the wrong words, it is the parking lamp which is part of a dual feature with the flashers. The link below shows exactly what I installed. I just plugged it into the socket where the bulb goes and plugged the bulbs into the socket that came wired to the resistors. Perhaps I did something wrong?
Look at this on eBay http://www.ebay.com/itm/182330885628

 

[Blckshdw]

Interesting, I didn't know they made those, although I guess I shouldn't be surprised. I'd start by making sure the pins are making proper contact between the OEM socket and your adapters. Test for voltage where the bulb plugs in, with a meter. Seeing as there's a 2nd resistor, which is connected to the parking lights, if you don't have a meter (but you should) you can check it and see if starts to get warm after a few seconds of operation.

 

[NelliM60]

Interesting, I didn't know they made those, although I guess I shouldn't be surprised. I'd start by making sure the pins are making proper contact between the OEM socket and your adapters. Test for voltage where the bulb plugs in, with a meter. Seeing as there's a 2nd resistor, which is connected to the parking lights, if you don't have a meter (but you should) you can check it and see if starts to get warm after a few seconds of operation.

Okay I'll give it a shot tomorrow. Thanks for everything.

 

[djthumper]

Yes you're right. I'm sorry for the using the wrong words, it is the parking lamp which is part of a dual feature with the flashers. The link below shows exactly what I installed. I just plugged it into the socket where the bulb goes and plugged the bulbs into the socket that came wired to the resistors. Perhaps I did something wrong?
Look at this on eBay http://www.ebay.com/itm/182330885628

They don't list to be compatible with the Trailblazers. It shows to be with the 2004 and not the 2006 but to the best of my knowledge they are the same.