Led drl flickers when using turn signal

Payton34 · April 9, 2017

My driver side led drl flickers when using the turn signal. But if my parking lights or headlights are on the drl doesn't flicker with turn signal. It is also intermittent it seems after trucks warmed up it doesn't flicker anymore. I think it's a ground issue so I found the headlight ground wire were it is bolted to the frame behind the bumper disconnected sanded all rust and wax coating off where the ground contacts the frame but it didn't fix it. I m wondering if the headlight plug has a bad pin or could it be th bcc It's not the headlight assembly because I plugged in another housing and still have same issue

Payton34 · April 11, 2017

Anyone familiar with wiring and grounds? Today I disconnected both grounds attached to the frame under each headlight cleaned the rust and wax coating off. When I reattached the grounds There was a spark on the passenger sode as I touched the ground to the frame but driver side didn't spark. Would this be an indication the ground wire is bad on driver side?

x219c · April 20, 2017

An actual flicker? If so, I don't have anything for you, really.

On my LT, if the headlights are on, my DRL will dim when I turn the blinker on. If the headlights are off, they turn off completely when the blinker is on.

Is the flickering visible to the naked eye? Video often has trouble capturing LEDs. They flicker very fast and it usually interferes with the shutter.

Hopefully this helps you narrow it down.

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ashfran85 · November 2, 2017

On 4/19/2017 at 10:08 PM, x219c said:

"On my LT, if the headlights are on, my DRL will dim when I turn the blinker on. If the headlights are off, they turn off completely when the blinker is on."

So I am not crazy then? My 2016 Sierra's DRL will turn out on the same side that the turn signal is activated on. I had a 2013 Chrysler 200 that it happened to as well. I was told that this happens so that other drivers can see the indicator during the daylight hours. I was driving behind a girlfriend of mine and she noticed and thought it was something weird with the wiring since I just had a new stereo installed and my turn signal chime sound has stopped (apparently GMC runs the sound through the stock stereo?). So this is normal for newer vehicles I am guessing?

x219c · November 2, 2017

So I am not crazy then? My 2016 Sierra's DRL will turn out on the same side that the turn signal is activated on. I had a 2013 Chrysler 200 that it happened to as well. I was told that this happens so that other drivers can see the indicator during the daylight hours. I was driving behind a girlfriend of mine and she noticed and thought it was something weird with the wiring since I just had a new stereo installed and my turn signal chime sound has stopped (apparently GMC runs the sound through the stock stereo?). So this is normal for newer vehicles I am guessing?

Yes, this appears to be normal behavior.

There are laws or rules as to what must happen depending on how close the indicators are to the DRLs. If they’re too close, they may have to dim or turn off. You may notice other vehicles with the DRLs away from the indicators that don’t dim.

Also, yes, your blinker and other sounds are piped through the factory stereo. Some integration kits will add this back with an aftermarket stereo.

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