Wiring Harness for Tacoma LED headlights

We are actively working on the next batch. I sent the last one of the prior batch out yesterday. I had them available for about 2 weeks, we are close to caught up with demand which is a good thing. They do take a long time to build and test.

High and low beams are unaffected/untranslated by both the TRD and the SR OEM LED conversion harnesses. Therefore auto high beam works as before, no changes. The only difference is halogen bulbs vs LED emitters as far as the light source. I believe the ECU controls auto high beam when enabled.

 

There is one for sale in the BST section

 

I just bought this harness from Jason from someone else on the board. It’s the complete kit to upgrade from SR to TRD halogen. Never used. Also have a new TRD set of halogen headlights. Any suggestions on how to mount and hook this up?

 

https://www.tacomaworld.com/threads/sr-sr5-oem-led-headlight-harness-v2.736263/

 

Thanks, this thread is for the full OEM LED upgrade though. I’m assuming it’s still pretty much the same? Do I need to purchase LED amber turn signal bulbs or can I use the original incandescents? I saw somewhere that there may be too much amperage draw using the originals if the LED DRLs are drawing from the same circuit. Thanks

 

We don’t have a thread for SR to Halogen TRD headlight swap. I do not intend to make one. You certainly can if you desire to.

LED bulbs have lower resistance than incandescent, so if the ECU detects what it thinks is a burned out halogen bulb then you may get hyperflash. If that does happen, you can likely address that by adding resistors to your turn circuit. Note that the resistors kind of defeat some of the upside of an LED bulb over halogen and you’re spending more for effectively the same thing. @crashnburn80 has done extensive testing of LED bulbs in halogen reflectors and projectors and most bulbs don’t come close to using the optics of the reflector / projector as well as a halogen filament. So, your best plan would be to stick with halogen turn signal bulbs and make sure they are NA (naturally amber) rather than clear with amber coating.

I currently run full halogen bulbs in my ‘05 and ‘02 however the turn circuits on those older trucks have a discrete flasher / controller which can be swapped out for an LED friendly one, which I’ve done. So I do plan to move toward LED bulbs at some point or at least play with them.

On my 2016 I run OEM LED up front and MESO total tails in the back, though I have some VLED tails to swap to once I get a chance. I do experience hyperflashing in reverse with passenger turn signal on. It doesn’t bother me.

Big picture-wise, since low and high beam performance is the same before and after, you’re paying money and doing work to accomplish nothing of material value outside of looks (which are subjective). I would recommend pursuing OEM LED instead as the best upgrade path and worthy of your time, rather than a change to halogen TRD which really only changes the color of the DRL, everything else is effectively the same. Lots of people really prefer amber DRL anyway.

TRD Halogen headlights have 5 connectors (sidemarker, low, high, DRL and turn) while SR has 4 (DRL and turn are a single 3 way) and OEM LED is one black MX-150 6-way.

 

I understand what I intend to to is for cosmetic purposes only and really just gives me the L shaped LED DRL and everything else is pretty much the same. There is a little more black out inside the headlight around the projector vs the SR but again, purely cosmetic. I’m cool with the labor required to swap them out myself and I already have the parts so why not? Puppypunter did the research to create this harness kit so I’m assuming he did the swap I will be doing?

 

Even @Puppypunter has seen the light and runs OEM LED now.

They are head and shoulders better than the halogen headlights.

 

Thanks for all the feedback. I’m only in $325 to swap out the SRs with the TRDs. I don’t do much night driving so the upgrade to full LED for better headlight performance isn’t really worth it for me. I don’t think I’ve even used my high beams yet. Unless I liked the cosmetic difference which I’m not totally sold on. I actually like the projector look. $1200 for OEM LEDs plus $200 for the harness is a significant difference from what I have invested so far. Thanks again, you and others on the forums are very knowledgeable!

 

Hello,
I purchased a harness through your website in September and installed OEM LED headlights in my son's 2021 Tacoma SR5. Worked like a charm and great installation instructions.
I am having a problem though and wanted to get your thoughts...
Intermittently, the left side DRL goes dim and turn signals on this side won't work. Seems to be random and I can't figure out where to start trouble shooting the problem. I don't think it is likely a problem with your harness, but wonder if you have heard of this problem before?
Thanks for any help or ideas you might provide...
Aaron

 

Actually sounds like the timer on that side. I’ll start a DM.
EDIT: Actually, bad timer should still have turns working. Maybe relay connector.

 

We use high quality sealed relays. Haven’t had or heard of one failing yet.

we don’t know the root cause here yet, so no need to assign blame at this point.

 

Hi from Canada! Just wondering if I can order the harness to retrofit a Bi-LED 2021 OEM headlights to a 2020 sr5 premium? which one will I need? Sorry but just starting the mod so I'm a bit of a noob.
Again, sorry.

 

This is the Tacoma SR5 OEM LED conversion harness:
https://fbchs.square.site/product/tacoma-sr-sx-sr5-2016-oem-led-headlight-conversion-harness/29

I don’t ship to Canada so you’ll have to find someone in the US who can relay it to you.

 

If you’re looking for the 4Runner harness:

https://fbchs.square.site/product/4runner-2014-2020-oem-bi-led-headlight-conversion-harness/20

 

Hello Dave. I just order your harness to upgrade my 2019 TRD headlights to the 2021 but the PRO version. i already finish everything and nothing works :/
I checked that the wires are on the passenger or driver side. Also make sure high and low are on the right connection. You think cause are the PRO version its the problem? Thank You

 

If nothing is working you have polarity wrong on the high beam connector which supplies the ground for the entire headlight. White w black stripe is ground everywhere. On the driver side, power for high beam is solid white. This is likely a point of confusion. On the passenger side high beam power is solid yellow.

The tabs on the male h9 connectors also indicate which way they connect to the females, one tab is closer to the edge, one is higher up, matching the curves.

Just color match it and you'll be good to go.

Note on the low beams I use white w blue (passenger) or red (driver) stripe to match the OEM + which is solid (blue or red). I do that to disambiguate on the passenger side with the parking light signal which is also dark blue. That's the one wire which doesn't color match clean to the OEM side, the strip is the color match.

 

More detail at the end of this (2nd post in thread):

https://www.tacomaworld.com/threads/oem-led-headlight-conversion-harness.719405/#post-25609796

 

OMG hahaha it was the high beam connection. I had it on where it was supposed to be. But I didn’t hear a click until now . Thank You so Much for your time and help. Everything works now thank you.

 

The h9 male connectors truly suck. I despise them. But, the alternative (which I did on my own truck) is about 1h of work to cut and crimp sealed connectors on high and low beam wires. And that's time with zero ROI really, the h9's work just fine once connected.