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Home > Maintenance & Modifications > Wiring fog lights for DRL’s? |
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TheWojtek Member Since: 08 May 2015 Location: Poznań, Poland Posts: 737 |
Quite simple, you can not turn on your foglights without turning on your other lamps. If you had position markers on only (and turned on the foglights) you'd break the rule which prohibites driving with markers on. If you had your main beam and foglights and the conditions are not foggy enough, you broke the rules of foglight use.
Hmmm. 24/7 DRL? I wouldn't be so sure. Either D or 24. Nevertheless, there is no need to have a compulsory DRL stated in law. A motor vehicle manufactured after 2011 and sold within EU has to be equipped with DRL and it has to be functional. Effectively, every >2011 car in Germany (or elsewhere) drives with DRL. Yes, I am aware it takes 30 seconds with a computer to turn it off. Local laws may (and do) extend this to older vehicles that could not have been regulated because such obligation cannot be created ex post facto. Not judging here, just a sum up of the laws concerning light use. Unfortunately, law is my profession by education so sharing the status quo in regards lighting.
If a premium vehicle that costed an arm & leg when new and is still equally dear in servicing needs an incentive to pass a MOT like a hoodlum's rustbucket because makeshift DRL... then there is no hope for us, we're doomed. Regards etc., Wojtek --- WAS: 2006 RRS Supercharged IS: 2010 RRS TDV8 HSE |
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Wed Nov 15 2023 10:02pm |
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NoExpert Member Since: 28 Jan 2022 Location: Poznań, Poland Posts: 483 |
Think I’m going to put this on the back burner for now. Maybe early next year I’ll revisit it. I have done more looking into it and I don’t disagree with what TheWojtek is saying about the legalities, mostly in what I’ve read in the specific markings that need to be on the lights to satisfy certain legal requirements. The fog lights I have are just that, fog lights. Perhaps if I find some dual DRL/fog lights I may give this a bash and wire it like the factory setup for their DRL’s. I can’t justify the cost of the genuine setup, and most of the dual setups I’ve seen I wouldn’t trust. But if I do find some I trust I’ll get them and go for it. Probably won’t be much of an issue once we move out of Poland since we’ll be where DRL’s aren’t required. 2011 RRS HSE Luxury 3.0 TDV6 Fuji White on Ebony/Ivory
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Thu Nov 16 2023 10:29am |
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Cpt Jack Sparrow Member Since: 07 Sep 2016 Location: Cardiff Posts: 132 |
Powerful UK do a 2 types of dual lights both fog and DRL
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Thu Nov 16 2023 4:33pm |
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Andy K Member Since: 18 Sep 2015 Location: GL Posts: 4967 |
Pistn I fully understood what you were explaining. And hence I was able to point out a potential issue now, before someone implements it |
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Thu Nov 16 2023 5:39pm |
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NoExpert Member Since: 28 Jan 2022 Location: Poznań, Poland Posts: 483 |
Cot Jack Sparrow, I’ve seen what Powerful UK offer and unfortunately I’m just not impressed. When I come across the right ones I’ll get them.
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Thu Nov 16 2023 6:18pm |
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Pistnbroke Member Since: 22 Sep 2020 Location: rugby Posts: 416 |
Andy there is no issue with the wiring as I described .I have it on two cars both of which have passed the MOT and the DRLs go off when the main lights come on.
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Thu Nov 16 2023 9:51pm |
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TheWojtek Member Since: 08 May 2015 Location: Poznań, Poland Posts: 737 |
Hey, it just struck me that if you have a DRL8 marking on these lights, they may actually be capable of being a "legitimate" DRL with lower voltage applied to them. This is something I have planned to have designed - a small circuit fed by live power, providing different voltage out, depending on the state of the main beams. In your case this could be configured to 9V out constant, 0V if main beam is on unless fogs turned on manually, in which case 12V out. I have a PCB designer on standby to create a prototype for such a thing I want to implement in the second set of headlights I have spare. In my case the plan is to swap the useless signature LEDs for a set powerful enough to be a real DRL but make them dim automatically to regular level when main beam or indicator is on. This may be a self-contained solution that would only tap into existing wiring. Regards etc., Wojtek --- WAS: 2006 RRS Supercharged IS: 2010 RRS TDV8 HSE |
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Fri Nov 17 2023 9:04am |
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NoExpert Member Since: 28 Jan 2022 Location: Poznań, Poland Posts: 483 |
I’m curious if DRL8 implies 8v if run as DRL’s. There’s another version of these that have DRL10 on them, perhaps they’re 10v.
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Fri Nov 17 2023 2:53pm |
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