I put a set of led tail lights on my 2010 tahoe. I noticed that when I use either turn signal the arrow on the dash blinks fast as hell. When i got home I tried both signals and all 4 turn signals come on. I saw the video to use a resistor for the hyperblinking, but I couldn't find anything for this issue. Can someone tell me what the hell I can do? I replaced the stick tail light housings with LED housings, I also replaced the 2 harnesses for the taillights because 1 of them was in poor shape. I tried both plugs on the light, and I'm just at a loss here
2010 tahoe led tail light issue
- Thread starter Nickct203
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intheburbs
Full Access Member
You need to install a load resistor for each light to "simulate" the incandescent bulbs. The LEDs draw so little power, the BCM thinks you have a bulb out, causing the hyperflash.
Just Google 2007 2014 Tahoe led load resistor and head down the rabbit hole.
Myself, I always bought LEDs with built-in load resistors.
Just Google 2007 2014 Tahoe led load resistor and head down the rabbit hole.
Myself, I always bought LEDs with built-in load resistors.
Yup, my tails have the resistor built in. I also bought an LED all-lights module for my ‘03. Well worth it. Plug n play and no worries about hyper flash, or issues with cruise control, etc.. much cleaner IMHO, than using the standalone resistors. Looks like for your 2010, this relay should work:
XtremeAmazing 3-Pin CF13 Electronic Flasher Relay for Car Vehicle LED Turn Signal Light Bulbs Hyper Blink Flash https://a.co/d/beNAb5U
intheburbs
Full Access Member
The GMT900 trucks don't have a flasher module. Blinking is controlled by the BCM itself. I don't know why Amazon says that fits - they're wrong.
you have to add a resistor to each light with a led, they get hot (real hot) so you will want to mount them against/on metal, they will melt plastic and anything that touches them including wires. do not touch one after you have had the lights on it will teach you real fast just like a child getting burnt on a hot stove or pan
Ok so add a resistor to each tail light and that'll fix all 4 coming on at once? I'll be doing this when I get out of work today then. Thank you
as long as you have not changed the front bulbs to led then yes you only need 2, if you change the front you have to do the same to them.
usually aftermarket lights come with a resistor that is either built in plugs in.
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The fast flash is called hyperflash, and you need to install resistors in those circuits, in order to slow down the flash. I left the hyperflash on mine, as I believe that the fast flash attracts more attention from other motorists, and after all, that is the purpose of the directional signals in the first place. I will note that hyperflash is illegal in some states.
I know it's been a few weeks but I finally installed the resistors and it still didn't fix my problem. The hyperflash isn't my issue. My issue is whenever I use my directional all 4 come on. I signal left all 4 come on, I signal right all 4 come on. Idk if it's an issue with the taillights themselves or what. But I have no clue how to fix this.
Scott in AZ
Full Access Member
I don’t understand the whole resistor workaround. Resistors convert electrical energy into thermal energy - heat. I’ve heard the resistors get too hot to touch, but I don’t know this for sure. But that’s a lot of energy. So your power draw and current probably actually goes up with the resistor inline in series with the LED fixture. LED on the stop lights and flashers in an old GM SUV is a solution looking for a problem that causes another problem, is what I think. Why not just replace the fixture with new crystal fixture (or polish the old one) and use LEDs for the backup lights and 3157 incandescent clear and amber for the stop light and flashing turn signal lights?
By the way, have you checked your Cruise Control?
By the way, have you checked your Cruise Control?
I bought the new LED rail light because someone smashed out my stock tail lights. So instead of just buying the stock looking tail lights I bought these. And I rarely use the cruise control so no haven't checked it.
I've been trying to find where this post was and finally found it. I know it's been awhile but I finally remembered to check the cruise control. To answer your question, no it no longer works. I also noticed that when my head lights are on I don't have brake lights either. I only have brake lights when my headlights are off.
your issue is something is not wired correctly it is either the tail lights or resistors or both.
all 4 flashing happens when they are wired incorreclty.
when it is wired wrong and or has a bad load it can make all 4 flash and maybe even do wierder things like light up a headlight and a marker light on the rear, or even something else totaly bizzare.
how do I know? because I have done it myself a few times
you are going to have to troubleshoot, I would start with the tail lights and check each circuit. With aftermarket lights you may need to switch wires around because they are usually made in china and you will be lucky if they even worked at all to begin with.
onvce you get it sorted out they will work correctly and cruise control should also then work, cruise control will not work if it detects a problem in the brake lights or system or if there is a check engine light on.
Thank you for the help. I've been beating my head for a very long time now. My third brake light also stopped working.
3rd light is tied into one of the tail lights I forget which side
you could check the gm upfitter guide it has wiring diagrams that may help
Awesome thanks again. I went and popped my head under the back just to see if 1 of the wires was broke. At that point I was at a loss. The wires for both sides are all the same color. 3 dark green and 1 brown. My son put the lights in for me when I was at work, he thought he was helping me. What he didn't tell me was he broke 1 of the clips so his friend has the same truck and he got the 2 new taillight harnesses from him. His friend said he got them off Amazon. So now I'm thinking those might be no good.
you just need to check to be sure they are wired correctly most likely that is the problem.
