2018 Tundra LED headlight wiring info with diagrams

All,

Been surfing on here about all the different folks seeking a harness for your 2018 led lights. Like @Roman said TRS out of Atlanta will also be making the pnp harness.

It's easily lost in all the posts on here.

 

I switched it back to how you had it! The DRL wouldn't turn on if the headlights were set to auto and it was bright outside the way I had it. But here's a video of how it functioned while in the garage. https://youtu.be/qEI-jz9BZJ8

 

I wanna give a huge shoutout to @thomasbus337 and @BlueBottle for helping me get my headlight harnesses complete. Not going to lie, I spent alllllll day on the computer refreshing the page the day the 8 harnesses were originally going to be listed for sale. I even PM'd a moderater asking him to allow @thomasbus337 to sell the harnesses so I can get my hands on one.

I missed out the second day when they were listed, but it was a blessing in disguise as it helped me step out of my comfort zone and do something that I was intimidated to try. After some guidance from these guys mid instal, I finished up my project and I couldn't be more happy!! They work flawlessly, and I am happy I learned how to do something new!!!!!! It took me a while, but they are done!!


My advice to those that are considering doing this, watch videos online how to crimp terminals for weatherpack connectors. And make sure the orientation for your harnesses are correct (make sure they aren't upside Down

 

They look great!!!

So they work perfect? Dim/Bright DRL? Video with it complete?

 

Congrats @Redlineaz
It's a feat you should be proud of. For anyone else attempting this, don't be intimidated.

 

Yep, after I flipped the red and purple wires around like Thomasbus recommended (because I had them backwards) it works like OEM. Did you see the video I posted a couple of comments before this? It shows THE DRL stay bright because I had the black connector wires backwards, but now it dims when the headlights are on.

 

Thanks man!! Couldn't have done it without your help!!

 

I did see the video. I didn’t see the DRL dim in that one. I was wondering if you had a new video lol

 

In addition, I would welcome/compensate if some one could post a video of the SR5/Limited/Pro of the 2018HLs and DRL install...

Thanks

 

Can anyone tell me what is used in #86 and #30 of the relay for the SR5? I'm assuming it is the two wire that are coming off the in line fuse holder?

Also how do I find the gray wire that goes in #85? This is the wire I cut under the steering wheel.

I'm getting closer to understanding this just need a little more help.

 

man these lights look really good on a white tundra. i may have to switch.... really liking the white right now.

 

Your LED DRL now dim with the parking lights? I want mine to work like they do on my 14’ platinum now. I don’t think they dim with the parking lights; only with the headlights on.

I kind of like the idea of them always being on full brightness.

 

Nice these headlights are looking great working properly ..

 

haha, if you can't imagine it I'll have to make a new video. LOL

Thanks bro!!!!! I am so glad I installed them!!

I like them on full brightness too, but I haven't figured out how to do that yet. When I had the wires reversed it worked on full brightness, but then the DRL turned off when the lights came on, (if I remember correctly), so I just put the wires back how they were supposed to be. The platinums dim from the factory when the headlights turn on. The way the wire harnesses are setup, they don't dim when the parking lights are on, only when the headlights are on. Thats what mine do too, only dim when the headlights are on.

 

Thanks

 

Yes, please add some nice music to it also lololol

 

Thank you so much @thomasbus337 for the harness. I got the headlights installed and I love them. Then only problem is my blinker started clicking fast indicating bulb is out. all the lights are working properly so not sure, has anyone else had this issue?

 

Sounds like you may need to install a resistor. Been watching some videos on LED lights and those lights draw less power. The truck thinks the light is out when its not a resistor can fix that. Someone else may have another solution however.....

 

What turn led turn signal bulb do you guys recommend to use on the 2018 housings? I read that the tritons are a good upgrade but wanted to see other options. If I'm not mistaken the 2018 headlights use a different bulb 7444na..

 

@PROTX , I asked the same question, look 2-3 pages back

 

What kind of bulbs are you using for your turn signal?

 

@Judd1980 I saw the previous post regarding the triton v3 and v6s but was looking for other options besides those.

I found this set below, they are 7443 but my understanding is that this bulb is interchangeable with 7444

https://headlightrevolution.com/gtr-lighting-carbide-series-7440-7443-led-bulbs-c-k-compatible/

 

Glad you are happy with the harness. Just curious, did you re position the turn signal pins?

 

If he is using the conventional bulbs it shouldn’t blink fast.

 

You answered your own question. Triton v6! I preordered mines. Waiting for them to come in.

 

here is a video I made if anyone wants to see the '18 headlights installed and wired up like it is supposed to be.
Cycled through park light only, Lows, Fogs, High beam, DRL only etc.
You can see the DRL on full brightness around 0:52 seconds which is when I started the truck and let go of the Parking Brake.

https://www.youtube.com/watch?v=qDl7nbjPNXA&feature=youtu.be

 

I want these but shipping to Hawaii is rediculous....

 

Look what the brown truck left for me today, Thanks @Roman for the great customer service.







And I just finished part of my harness, still waiting on parts for the DRLs, the 2 connectors to re-pin the turn signal lights and take the purple wire to the 8 pin plug are on backorder according to Roman






Thanks @thomasbus337 for making the parts list and thanks to @inferno_pro_satx for the heads up on that gray wire from flasher relay.

 

Just got done installing the headlights and having the same issue as @AK-in-MI. Installing @thomasbus337's harness and the Morimoto Motocontrol H4 relay was a breeze (thanks to @thomasbus337) but the issue I'm having is the fast blinking turn signals. Interestingly enough, when I turn on the hazards, they blink at the normal pace. But when I turn on either right or left turn signals, they blink really fast like a bulb is out.

Also, I feel like the DRL may not be getting brighter (stays dim) when I switch to parking lights. I will double-check this in the morning since I'm pooped from a long day, but the 2014 factory DRL seemed much brighter. Because it's too dark right now, I can't test it in "Auto"

Any ideas guys?? I'm using the turn signal bulbs that were shipped with the headlights and have not switched the pins. Any guidance is appreciated.

 

You have to re-pin the connector the 2018 pins are different to older models look at the diagram and check for that in your pins this might solve your problem