LED Daytime running lights?

Discussion in 'Exterior' started by Manny328, Apr 28, 2014.

  1. bradac

    bradac TYF Newbie

    Posts:
    10
    Likes Received:
    4
    Joined:
    May 25, 2019
    Name:
    brad
    Has anyone found a solution to running the DRL led strip 100%?

    Is this a programming and wiring thing? Or is it an entirely different headlight ?

    I only ask as the 2018 models have it standard across all trim headlights now, but still halogen bulbs on lower trims, so there has to be a way right?
     
  2. Dcmaynor

    Dcmaynor Full Access Member

    Posts:
    547
    Likes Received:
    277
    Joined:
    Jan 15, 2018
    Location:
    OH
    Name:
    Dana
    I’m tagging @cmatt
    I have his solution and it works on my 16 to only have DRL as the LED strip if you desire it. Not as bright as 18, but it works.
     
    cmatt likes this.
  3. bradac

    bradac TYF Newbie

    Posts:
    10
    Likes Received:
    4
    Joined:
    May 25, 2019
    Name:
    brad
    Yeah I’m curious if I put standard 2018 headlight lights in my 2016 with his solution if I would get 100% brightness, they seem to have different part numbers for headlights 2016 vs 2018.

    I know in the past people tried Ltz lights and it didn’t work but that had more todo with programming due to HID, as HID can’t dim. But maybe a 2018 standard headlight might just work.
     
    BEIS likes this.
  4. BEIS

    BEIS Member

    Posts:
    41
    Likes Received:
    29
    Joined:
    Jun 21, 2017
    Name:
    BEIS
    I really wonder if this would work. It seems like it would - pair up CMatt’s harness with new headlights from a 2018+ Tahoe. Maybe CMatt could chime in? He’s the pro when it comes to our harnesses.
     
  5. cmatt

    cmatt Full Access Member

    Posts:
    223
    Likes Received:
    135
    Joined:
    Apr 29, 2009
    Name:
    Matt
    That should work. I believe the LED strips are different parts between 2017 & 2018. The main hurdle would be the expense of swapping headlamp assemblies.


    Sent from my iPad using Tapatalk
     
  6. bradac

    bradac TYF Newbie

    Posts:
    10
    Likes Received:
    4
    Joined:
    May 25, 2019
    Name:
    brad
    I have the ability to obtain the newer 2018 standard headlights, and install them on my 2016 Tahoe LS, I just don’t have the harness. Are you referencing the Gen5DIY harness?
     
  7. 73Vetteman

    73Vetteman TYF Newbie

    Posts:
    24
    Likes Received:
    15
    Joined:
    May 30, 2015
    Name:
    John
    I suspect the only difference between the 2017 and 2018 headlight assemblies is slightly brighter led strips. Not worth the expense if that is the case.

    The Body Control Module (BCM) programming is definitely different on prior to 18 models since it sends a Pulse Width Modulation (PWM) for reduced headlight brightness when headlights are used as DRL’s. The 18 and later BCM sends full power to the led strip instead of the headlights for Daytime Running Lights (DRL). The relay system I made alters the 15-17 BCM signals to perform like the 18 and later BCM output.
     
    Last edited: Jun 3, 2019
  8. cmatt

    cmatt Full Access Member

    Posts:
    223
    Likes Received:
    135
    Joined:
    Apr 29, 2009
    Name:
    Matt
    I’m not referencing their harness. My expectation, if you swap in the newer 2018 standard headlamp assemblies, is that they would behave like yours do now, but with a brighter LED strip. My harness would make the LED strip come on as DRLs instead of the headlamps.
     
    BEIS likes this.
  9. dvpvic

    dvpvic TYF Newbie

    Posts:
    9
    Likes Received:
    2
    Joined:
    Jun 2, 2019
    Name:
    Victor
    Hey guys though Id share what Ive found in regards to the LED strip in a 15-17 headlight vs the newer 18-19. The actual strip is different. I plugged in a 2018 set into my 2016 LT and everything functioned but LED strips were brighter. What didn't function is the whole LED DRL mess. It is a BCM thing like everyone has said on here. Check link below to thread where I posted a pic of side by side comparison of the two different housings (post #20)

    https://www.tahoeyukonforum.com/thr...light-led-as-drl-vice-low-beams.111622/page-2
     
  10. Dcmaynor

    Dcmaynor Full Access Member

    Posts:
    547
    Likes Received:
    277
    Joined:
    Jan 15, 2018
    Location:
    OH
    Name:
    Dana
    Where did you get the newer LED strip and how hard was it to swap out?
     

Share This Page