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DRL mod

 
Old 06-26-2015, 08:08 PM
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DRL mod

I'm sure somebody has done this already, but I changed my blinker bulbs to white/amber LED switchbacks. Seems like perfect location to give OEM type LED "strip" across the bottom of the headlight. Requires a bunch of wiring-relays/resistors etc. No DRL error, still have high beams. Auto turn on with engine start, auto turn off with engine off after @15sec delay.

I've literally been waiting months for VLEDS V3 to get back in stock, but got tired of waiting, so just went with some less powerful ebay lights ($25 vs $174...). Amber blinkers brightness is satisfactory, but the white DRL could be brighter, gets a little washed out in the sun. I am impressed with the color, it is more of a pure white 5000k temperature that I wanted (alot of cheap ebay less are too blue).

I also installed some VLEDS 10XB 5000k LED fog light bulbs, match factory low beam color perfectly and are plenty bright.

Video

Last edited by komplexZ; 06-26-2015 at 08:11 PM.
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Old 06-26-2015, 09:41 PM
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Looks good!!!

Any info on the wiring or feel like making me the same thing? I'll pay you for it...
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Old 06-26-2015, 10:47 PM
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You son of a bitch! Nobody has done this. This was my dream! Ever since L'sTL introduced me to switchback LEDs, I knew this would be the perfect DRL solution for the RL, but my dreams were interrupted.

Good fucking work, son! I don't even give a shit if you don't share how you did it.


P.S. What's with the TSX avatar but RL OP?

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Old 06-26-2015, 10:53 PM
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I moved this to the main forum since this is the greatest thing to happen to the RL since...

I don't even know.
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Old 06-27-2015, 08:59 AM
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It's not a fancy implementation, more just brute force.

I initially researched a more elegant way of disabling DRL, and looking at the factory wiring diagrams, I believe you'd have to access/cut into the engine bay fuse box, the sealed side portion, which houses the main DRL switching control. I wasn't interested in that.

Here is a written description of what I did.

Disable factory DRL:
Wire in a relay that is triggered off the headlights to switch between a 10 ohm load resistor and high beam bulb. I used a 9005 socket and plug to plug directly in between bulb and factory connector. To get low beam trigger for relay, I tapped into low beam fuse in engine bay.

When you use the high beams during the day, the low beams actually come on too, so high beam switching will work day or night with this method.

1157 Switchback bulb:
The bulb itself is a "type 2" which means the white turns off when the amber blinker is on. This function is internal to the bulb, I used this one http://www.ebay.com/itm/261881129983?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
The factory socket is 1157 (dual element bulb), but the factory wiring is only for single element. I used new generic 1157 plug and socket (3 wires) to interface between factory connector and new bulb. The car already provides blinker power and a ground, so the 3rd wire is open to wire to power source for white drl. I also wired in 6 ohm resistor to prevent fast blink.

I bought an "auto drl control box" to turn on/off the white section of the switchbacks. This just connects to +/- on battery and the output would normally go to the 3rd wire on 1157s. I didn't fully trust the module by itself to power higher power leds that I originally was planning for, so I wired it to control a relay instead to provide LEDs direct power from the battery.

This module also as a wire to turn them off with low beams, so similar method, wired it to low beam fuse.

Hopefully that all makes sense...?

Here are the 4 harnesses I made with annotations




The RL is my wife's car, TSX is mine (you can see it in the video). With another baby on the way we might swap the TSX for an MDX, which would then be the wife's car and the RL is all mine!

Last edited by komplexZ; 06-27-2015 at 09:03 AM.
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Old 06-27-2015, 08:32 PM
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Originally Posted by NathanJax View Post
Looks good!!!

Any info on the wiring or feel like making me the same thing? I'll pay you for it...


Thanks! Not too interested in making more, but hopefully my post above answers most questions. I could probably throw together a wiring diagram if needed.
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Old 06-27-2015, 10:00 PM
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Originally Posted by komplexZ View Post
Thanks! Not too interested in making more, but hopefully my post above answers most questions. I could probably throw together a wiring diagram if needed.
That would be great. I don't mind making one if I knew the exact parts to get and had something showing exactly what to do.

I think our DRL are the worst part of our RLs. Everything is so nice and modern and then we get incandescent bulbs for DRLs instead of LEDs.


PM sent

Last edited by NathanJax; 06-27-2015 at 10:04 PM.
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Old 06-27-2015, 10:05 PM
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Just an FYI, the DRL error resistors don't need to be super low. I used 100 ohms in my DRL switch, and it didn't cause any errors. It's not a huge deal, but it can save you some extra electrical loading.
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Old 06-27-2015, 10:24 PM
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Originally Posted by oo7spy View Post
Just an FYI, the DRL error resistors don't need to be super low. I used 100 ohms in my DRL switch, and it didn't cause any errors. It's not a huge deal, but it can save you some extra electrical loading.


Good to know! Yea I already had 10 Ohm's laying around from a different project that changed course. They do get hotter then I expected, which I dont like too much, so just ordered some 100 ohm resistors...

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Old 06-28-2015, 02:58 PM
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What does the low beam trigger do?
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Old 06-28-2015, 08:50 PM
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Originally Posted by oo7spy View Post
What does the low beam trigger do?


Connection to the DRL module turns off the switchback white LEDs, connections to the other two relays switches in the high beam bulbs.
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Old 06-28-2015, 08:52 PM
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I'm very impressed with this mod. It looks very OEM!
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Old 06-29-2015, 07:31 AM
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you lose points for those weak halogen high beam bulbs ... nice work tho.
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Old 06-29-2015, 07:54 AM
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I made a diagram for the wiring and attached it in case anyone is interested (it will serve me just as well to I remember what I did )

I'm not claiming this is the best way to do it, just a way. If anyone finds any errors, let me know I can update it.
Attached Files
File Type: pdf
RL DRL Mod Rev1.pdf (26.5 KB, 368 views)
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Old 07-10-2015, 10:25 AM
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Thanks for posting this up. If you had a quick parts list that was needed that would be apprechiated. I was going to one day do something like this ! But you are the man
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Old 07-15-2015, 01:01 PM
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Originally Posted by JDMCRX View Post
Thanks for posting this up. If you had a quick parts list that was needed that would be apprechiated. I was going to one day do something like this ! But you are the man
Sorry for the slow resplonse, forgot about it.

For the switchback wiring I used the following types of parts:
http://www.ebay.com/itm/291274463680
http://www.ebay.com/itm/121405080860
http://www.ebay.com/itm/300784762390

The switchback bulbs I bought came with the 6 Ohm 50W resistors, and I think it only added a few bucks, so depending on what bulbs you buy, they might come with resistors already and will save a little $ then ordering separate.

I also found another option that will require a little less effort:
http://www.ebay.com/itm/121309872608

Looks like it's already the 3 parts wired together, for a total cost of a little less than buying separately. If I did this again, I'd probably give that harness a try. Looks like most are direct from china, shipping might be slow.

In the parts I used, the black wire was ground, red was amber light, blue was white light. I won't guarantee they will all follow that, so probably good to double check before wiring it all together.

DRL bypass:
http://www.ebay.com/itm/121280130625
http://www.ebay.com/itm/151718737554
http://www.ebay.com/itm/271832680988

The 9005 extension harness you just cut in half and wire in the relay/resistor in between.
You wont need 5 relays, I just used 3 total, but they need to be SPDT

DRL module:

Many options for this, but below is the one I used:
http://www.ebay.com/itm/251793467690

I notice they did change the functional description. Mine was advertised as it will turn off with the headlights(which it does), now it says it half their brightness... which probably won't work well with my implimentation. I use the DRL module to power a relay to send direct power to the DRL, so if this module now the reduces the 12V or does some kind of PWM signal, the relay might stay on, might turn off, or might chatter, hard to know. The way I wired in the relay is optional, you can skip and and just use a DRL module to power the lights too.

For tapping into the low beam fuse, I just stuck a wire in the slot and pushed the fuse over it. If you want a cleaner way, these fuse taps might work: http://www.ebay.com/itm/221634007333
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Old 10-25-2016, 08:43 PM
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can you built me whole kit?
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Old 04-10-2017, 08:29 AM
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Just seeing this, nice work! Everything looks flawless!
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Old 11-07-2017, 04:28 PM
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Originally Posted by wildwayne View Post
can you built me whole kit?
I have a whole kit for sale in the FS section.
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Old 02-15-2018, 08:21 PM
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Originally Posted by NathanJax View Post
I have a whole kit for sale in the FS section.
where? And how much?
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Old 02-12-2019, 03:52 AM
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Originally Posted by oo7spy View Post
Just an FYI, the DRL error resistors don't need to be super low. I used 100 ohms in my DRL switch, and it didn't cause any errors. It's not a huge deal, but it can save you some extra electrical loading.
So if we are using 100 ohm resistors, what should be the wattage? Should it be greater than 50W/load resistor?
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