Just putting this out there as an idea that's been popping up in the back of my mind. After watching some boob tube with the wife I saw some flavor of new SUV has the DRL bar lamp change color to yellow for the turn indicator which I thought was pretty clever. Wondering if we could flip that around and use the turn indicator as a DRL with a color flipping LED?

If you've never seen one a color flip LED has two different colored elements that light up dependent on which way the lamp is powered. I installed a red over white one in the cargo lamp housing on the back of my '71 F-350's cab to act like a high mounted stop lamp a couple years ago. It's not super effective during the day due to the white lens but does wonders at night. I wonder if the newer bulbs are more powerful? There's also the question of aesthetics with an LED being so visible i the clear housing. I loved the jeweled lamp modification look.

The front turn lamp on our cars is a dual element bulb with only the bright element powered. The other dimmer element would be for a marker lamp but Jaguar's lamp strategy uses small bulbs for that function. It's been a while since I was in there but I assume the removable lamp holder only has two contacts. Possibly other models use the same holder with three contacts? Or possibly make a custom holder with the third contact and an external wire.

Per wiring, find a powered when running source for the color switch LED in the housing. Add in an 5 second off delay timer and relay that would drop the DRL out when the turn element is powered and delay five seconds before powering it back up. Minor wiring modifications and hopefully mount the whole works in the OEM lamp housing.

So, lots of research to see what's available and go from there. LED, timer, lamp housing. Anyone wants to add to or run with this they are welcome.

 

I love how motivated and out of the box you are, be sure to let us know how this progresses.

 

They make umpteen devices for this.
Its called a switchback.
https://www.ebay.com/itm/ERROR-FREE-...oAAOSwJc9afjYv


You are like me, I thought I discovered static electricity when I was a kid, till my teachers told me I would always be a day late and a penny short.

 

I had considered these ones in the gap that is naturally there under the headlight assembly and front bumper.
https://www.ebay.com/itm/2-Ultra-Sli...0AAOSwAvJW8qA8


So I installed this led on my truck to see how long it last and if it fades over time, as all of these non-branded bulbs do.

 

Good, they have come a long ways since I was last interested. So it looks like there'll only be install specific problems to overcome.

I'm more curious how it'll look versus the halos which IMHO look weird in the headlamp buckets on our cars. The XK fog halos look pretty good.

On a side note, I've been doing mostly farm equipment repairs the past month. That and trying to finish rebuilding my 20 x 40' shed. Good times. Haven't spent any time with the car other than enjoying it.

 

This is something I have a nice looking solution to implement if I just could with honesty tell my boss a price point and market interest beyond just a few cars.

Without that knowledge I would some day have made a few sets, and maybe see where it goes. I'm not a business man, and marketing is not my game.

 

In my unbaised opinion (as in I am not married to either) I think the single-spot led beam pattern is correct for our headlight shape and the style of our cars. (which is probably why they never put led-strip on my car- which has leds in the rear).


I think the led strip is too modern for a car that is fundamentally a throwback. The headlight is a copy of the Etype, and when they went to led drl, they changed the shape to a modern look- kept the rest of the car the same.


To me; Audi/Germans own the led strip look. BMW owns the halo. So for those reason they are out for me. I would not feel right trying to be something I am not.



go check out the DRL on the Porsche suv. I think they use 4 pencil beams. looks good.

 

Spent a little more time on this today as I jacked my back up and took a day off to rest.

Logic statement per second of time. 1's are lit, 0's are dark. I want to use a delay timer so the white light stays off while the yellow flashes.

White DRL element 1-1-1-1-0-0-0-0-0-0-0-0-1-1-1
Yellow turn indicator 0-0-0-0-1-0-1-0-1-0-0-0-0-0-0

Something similar to this for the bulb:
https://www.ebay.com/itm/3157-Bright...r=591057008309

Then something like this for the timer:

Package it so the whole works stays in the lamp housing and forget-about-it.

Still haven't had much success with the turn lamp holder from the jag parts sites. Hoping it's not an OEM only part of the $2900 lamp assembly.

 

Like this?
https://store.ijdmtoy.com/Switchback...0-05x-2835.htm

 

Yeah, but in a 3457 bayonet base . Stumbling through sale listings for a timer that will work is a PITA. Need something that once triggered changes the output state for 5 seconds and then changes it back. That way while the yellow is flashing the white is dark and it stays dark for a couple seconds after the yellow stops flashing.

 

Are you trying to say something in Morse Code?

 

Keep in mind that LED controllers can interpret your 0's and 1's with levels in between.

Just 0's and 1's result in what could be a disorienting strobe of immediate full power.

With a bulb light output is driven by temperature, so there is a natural fade up and then fade down.

 

No, just trying to demonstrate the logic I need the timer to allow for. I couldn't figure out how to post and high and low bar so 1's and 0's were a substitute.

See above, on and off represented by 1 and 0... I want the DRL off while the signal is flashing and stay off a couple seconds after the signal stops lighting up. All I need is a timer that changes states when triggered by the signal (goes high) and times out 3-5 seconds once the trigger is lost (goes low). There's no industrial standard for relay logic between changing the output states based on input and when the timer comes into play and what the output does when timed. There's a metric poop ton of difference configurations. I'm looking for logic where the input goes high, output goes low, timer counts and once finished output goes high.

 

https://www.aliexpress.com/item/WS16....13339.90158.0



This one would probably work logically. Connect the blue output to a relay and have the DRLs powered through the normally closed (N/C) side. Turn signals light (red line), relay energizes and opens the power path to the DRL's turning them off. Increase the timer delay so it doesn't time out while the turn is flashing off and the DRL doesn't light up in the middle.

Packaging is larger than I'd like though...