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Day time running lights LED's

Trailboss75
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Trailboss75 Enthusiast

Trailboss75

Posted
Posted

Has any else noticed only one side LED light comes on?  I have noticed it a couple of times that only one side is on and noticed it on a couple of 10 trucks around me that only one was lit.  Mine did it the other day, I turned the truck off and turned it back on and it came on.  So is this a sensor or wiring issue?  Has anyone else noticed that only one light comes on and not both sides.  I am referring to the LED running lamps below the headlights.

Silverado4x4 Senior Enthusiast

Silverado4x4

Posted
Posted (edited)

By chance are the turn signals on? If the left or right turn signals are blinking that LED will turn off till the blinker stops flashing. Both sides are lite on mine

Edited by Silverado4x4
mafd2 Senior Enthusiast

mafd2

Posted
Posted (edited)

Haven't heard of or seen this issue before. Like Silverado4x4 stated, if the turn signals are on the DRL's go off. All or most mfg.'s are like that.

Edited by mafd2
Trailboss75 Enthusiast

Trailboss75

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Posted

Interesting, I did not know that.  I know tonight I had my blinker on for sure ( but also when the headlights came on with blinker, the DRL came back on as well), but the other time I don't remember, will definitely do some testing, thanks guys!

  • Like 1
mafd2 Senior Enthusiast

mafd2

Posted
Posted
21 minutes ago, Trailboss75 said:

Interesting, I did not know that.  I know tonight I had my blinker on for sure ( but also when the headlights came on with blinker, the DRL came back on as well), but the other time I don't remember, will definitely do some testing, thanks guys!

So you've never noticed all the vehicles, suv's, trucks on the road with DRL's that go off when the turn signals are on? That's interesting.

econometrics Senior Enthusiast

econometrics

Posted
Posted

The DRL LED will stay on when you use the turn signal and your headlamps are ON. That’s because the LED DRL brightness is reduced when the headlamps are on. 

  • Thanks 2
mafd2 Senior Enthusiast

mafd2

Posted
Posted
9 minutes ago, econometrics said:

The DRL LED will stay on when you use the turn signal and your headlamps are ON. That’s because the LED DRL brightness is reduced when the headlamps are on. 

Correct.

Ion Enthusiast

Ion

Posted
Posted
14 hours ago, mafd2 said:

Haven't heard of or seen this issue before. Like Silverado4x4 stated, if the turn signals are on the DRL's go off. All or most mfg.'s are like that.

Yep.  Federal requirement for 2017 and on, iirc.  Makes turn signal more visible. Also the same reason the got rid of amber turn signals.  Not as visible as red.  

 

I do believe the headlight in the side of the signal turns off as well on some vehicles, though I don't think it's a requirement. 

  • 5 years later...
here4help New Member

here4help

Posted
Posted

So I have a problem where the drivers side drl, led strip only works during the day so daytime (both work) and at night only the passenger side one is on, both headlights work. So I'm wondering if it's a switch issue or fuse or something? I have a 2019 GMC Sierra limited or elevation. It's the same body style as a 2018.

  • 1 month later...
coachmac Enthusiast

coachmac

Posted
Posted
Quote
On 9/30/2024 at 7:10 PM, here4help said:

So I have a problem where the drivers side drl, led strip only works during the day so daytime (both work) and at night only the passenger side one is on, both headlights work. So I'm wondering if it's a switch issue or fuse or something? I have a 2019 GMC Sierra limited or elevation. It's the same body style as a 2018.

Did you find a solution to this?  I have the same exact problem.

 

Chevrolet1 Enthusiast

Chevrolet1

Posted
Posted (edited)
On 7/12/2019 at 9:08 PM, mafd2 said:

So you've never noticed all the vehicles, suv's, trucks on the road with DRL's that go off when the turn signals are on? That's interesting.

Correct, it's a safety requirement (law) for all vehicles. Watch other make & model vehicles as you drive.

 

If the DRL also functions as the signal, the DRL must turn off when the signal is on.

If the DRL and signal are separate, there is a distance/spacing requirement so the DRL does not impede visiblity of the signal.

 

https://jalopnik.com/heres-why-modern-cars-turn-off-one-of-their-lights-when-1792394567#:~:text=(c) The DRL is deactivated,off when using the blinker.

Edited by Chevrolet1
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