Model Year 2018 and Newer Possible 18+ DRL Disable? Need Input

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Thread: Possible 18+ DRL Disable? Need Input

  1. #1
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    Possible 18+ DRL Disable? Need Input

    I finally got my 19 premium 6mt last week. I am upgrading to Diode Dynamics headlight bulbs so I have been searching for a way to disable the daytime running lights so Iím not rolling with my brights on all the time. I understand that there are some that donít like the idea of doing this. Different strokes as far as Iím concerned. I still want to do this which brings me to the point of this thread. I noticed that when I set the parking brake the drls go out. I turned on the headlights and they stay on with the brake set. So why canít I make the switch on the e brake think itís engaged when the brake isnít set? It only takes a very little lift of the brake handle to make the lights go out so maybe a stop or something would work also. Then there is the light on the dash. How can I make that go out? I looked at the fuse circuits in the owners manual but couldnít find anything. My car is a stick so Iím not sure if itís the same on the cvt. Any thoughts or input would be appreciated. I apologize in advance to all that think this is a bad idea. I know there are as many on here that would like to do it as there are that donít.

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  3. #2
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    Quote Originally Posted by RAAK View Post
    So why canít I make the switch on the e brake think itís engaged when the brake isnít set?
    Because then the car's brain will think you're driving with the brake on, and you'll have the warning all the time. I can't help but think there's more to that warning than just the light on the dash.

    I doubt you're going to outsmart the car this way.

    Don't some of the LED companies have DRL-aware LED high beam bulbs that are designed for this?

  4. #3
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    Part of my question was how to turn the light off on the dash. The brain aka bcm is supposed to think you are driving with the e brake on. The brake will not be engaged and the drls will be off. Just have to either deal with the warning light or find some way to turn it off.

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  6. #4
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    Don't some of the LED companies have DRL-aware LED high beam bulbs that are designed for this?

    None that I’m aware of. For sure not Diode Dynamics.

  7. #5
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    I don't think it's smart to let the car think you're driving with the brake on. That may affect your ABS or how the transmission reacts.

    It's also unlikely you can turn off the warning light selectively. This is not a 1970s car with a separate fuse for each light and system. The dash display is controlled by a microprocessor that decides what lights to show.

    If you really need to have LEDs, why not look into retrofitting the car with the LED headlight assemblies from the Limited trim?

  8. #6
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    I appreciate the input. It is easily reversed if it does affect abs which I don’t think it would. I expected people to disagree which is why I apologized in the first post. Let me put it this way. I want my daytime running lights off. I’m just trying to find a solution. Like I said. Different strokes.

  9. #7
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    I don't disagree in principle, I just think the brake switch is a kludgy way to go about it, bursting with the potential for unintended consequences.

    What you really need is an SPDT relay with about a 10V min activation current. Below that, the relay would send the power through a resistor instead of the bulb, so the bulb would come on if it got 12V (brights) but not if it got 6-8V (DRL).

  10. #8
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    Well since you put it that way lol. I may have a relay on a 4hi hd headlight harness for a 95 tahoe I sold. I’ll have to check the relay specs.

  11. #9
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    I think the DRLs turn off individually when the turn signal comes on, so you'd need one relay for each side.

  12. #10
    Quote Originally Posted by RAAK View Post
    I noticed that when I set the parking brake the drls go out. I turned on the headlights and they stay on with the brake set. So why can’t I make the switch on the e brake think it’s engaged when the brake isn’t set? It only takes a very little lift of the brake handle to make the lights go out so maybe a stop or something would work also. Then there is the light on the dash. How can I make that go out?
    I know someone who installed a switch to override the parking brake switch and when the car thinks the parking brake is on, it disables the cruise control and who knows what else. They never worried about eliminating the warning light on the dash, but now they're able to evade the police when necessary.
    They also said it was a real PIA to get to the parking brake switch.

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