1. #1
    lessonstar's Avatar
    lessonstar is offline Junior Member
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    Why do LED running lamps turn off while the turn signal is blinking? Anyone knows?

    I've noticed in several new vehicles the following scenario:


    Vehicle is traveling with LED day-time running lights around/adjacent to the headlights
    Vehicle activates turn signal indicator
    Vehicle shuts off LED running light while turn signal indicator is flashing
    LED running lights turn on once the turn signal indicator stops
    Here are the cars I've seen seen this happen:


    Jeep Grand Cherokee
    Audi Q5
    Kia Sportage
    Ford Focus
    Why don't the LED running lights stay on while the turn signal is on?

    Why do LED running lamps turn off while the turn signal is blinking? Anyone knows?-jeep.jpg Why do LED running lamps turn off while the turn signal is blinking? Anyone knows?-ford.jpg Name:  KIA.jpg
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  2. #2
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
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    Re: Why do LED running lamps turn off while the turn signal is blinking? Anyone knows

    IDK. I may have seen this but chalked it up to a burnt out light. I will be watching for this now.
    I would guess it's a safety option. So, the running light goes out to ensure the pulsing of the blinker is observed. With the advances in automotive lighting and the acceptable range of colors headlights are brighter and more difficult to look at. Same could be said for the blinker. Advanced lights and brighter.
    From there it comes to reuse of design for ease of manufacturing, reliability, improved safety... Once it's adopted all the vehicles will have it.


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    JPNinPA

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  3. #3
    Bounty__Hunter's Avatar
    Bounty__Hunter is offline Moderator
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    Re: Why do LED running lamps turn off while the turn signal is blinking? Anyone knows

    Safety feature to ensure the turn signal can be seen, so it's not washed out by the DRL.

  4. #4
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    Re: Why do LED running lamps turn off while the turn signal is blinking? Anyone knows

    Quote Originally Posted by Bounty__Hunter View Post
    Safety feature to ensure the turn signal can be seen, so it's not washed out by the DRL.
    Exactly right. More information here. Jalopnik

  5. #5
    JPNinPA's Avatar
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    Re: Why do LED running lamps turn off while the turn signal is blinking? Anyone knows

    Ok After reading I find myself looking at every vehicle and counting how many I see each trip.


    JPNinPA
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    "Never look down on anybody unless you're helping him up" - Jesse Jackson

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