1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

OEM LED conversion harness DIY info

Discussion in 'Lighting' started by daveeasa, Dec 28, 2020.

  1. Dec 28, 2020 at 12:01 AM
    #1
    daveeasa

    daveeasa [OP] Slowest crimp in the West

    Joined:
    May 14, 2020
    Member:
    #328079
    Messages:
    1,293
    Gender:
    Male
    First Name:
    David
    San Diego
    Vehicle:
    2016 OR 4x4 DCSB MGM 6MT
    This is intended to be an informational thread on the parts needed, along with links to source them, to fabricate a conversion harness for a Pro, OffRoad, or Sport 3rd gen Tacoma equipped with halogen headlights when purchasing the OEM LED headlights offered on 2020 and newer vehicles.

    If all you desire is the cheapest possible way to get OEM LED headlights installed on a vehicle and you don't have any qualms, warranty-wise or otherwise about cutting up your OEM wiring harness, you can go directly to this post from @caribe makaira for the hack-and-slash option.

    If you have an SR / SR5, refer to post 2 in this thread.

    Credit to @Puppypunter and @caribe makaira for all of the information presented here, I am merely the curator.

    Tools:
    1. Crimper (you pick) suitable for 18 gauge wire
    Connectors:
    1. Molex MX150 connectors (qty 2) *female* 33472-0601 15320 02
      1. Corsa-Technic @ 2.29 each with pins
      2. Waytek @ 1.23 each
      3. Custom Dynamics @ 4.95 each
    2. H11 connectors (qty 4) *male*
      1. Amazon 4 pack w wires $7.64 -- depin before using
    3. DRL connectors (qty 2) *female*
      1. Corsa Technic @ 5.71 each
    4. Turn signal connectors 90980-11486 (qty 2) *male*
      1. Corsa Technic @ 3.66 each
    5. Sidemarker connectors to seal unused OEM leads (qty 2) *male*
      1. Corsa Technic @ 4.49 each
    Pins (match size to the wire you use, 18 gauge recommended):
    1. Molex 33012-3002 MX150 pins (qty 12) *female*
      1. Waytek @ $0.13 each
    2. H9/H11 pins (qty 8) 090II sealed *male*
      1. TBD
    3. Turn signal pins (qty 2) *male*
      1. Corsa Technic @ $0.21 each
    4. DRL pins (qty 4) TS 090II sealed *female*
      1. Corsa Technic @ $0.20 each
    5. Plugs (qty 6)
      1. Corsa Technic @ $0.18 each
    6. Seals (qty 6)
      1. Corsa Technic @ $0.22 each
    7. H11 plug (qty 2)
      1. $0.17
    Wire:
    1. 18 gauge GXL in multiple colors $21.95
    Optional accessories
    1. Braided sheathing
    2. vinyl housing
    3. 1/2 inch flex loom
    4. Friction tape

    Assembly instructions:
    1. Cut lengths (6" recommended, customize as desired) for pairs of the following colors:
      1. Red
      2. Green
      3. Brown
      4. White
      5. Black
      6. Pink
    2. Crimp H9 male pins on one end of each pair of red, white and black
    3. Crimp turn signal pins on one end of each pair of brown wires
    4. Crimp DRL pins on one end of each pair of green and pink wires
    5. Crimp LED pins on the opposite ends of all crimped wires
    6. At this point you may add any vinyl or braided housing as desired for protection.
    7. Push the crimped pins from step 5 into the LED connector as shown in the diagram
    8. Push the ends of the white and black wires into an H9. Note polarity as shown.
    9. Push the ends of red wires into the remaining H9 connectors making note of polarity
    10. Push the ends of green and pink wires into the DRL connector
    11. Push the ends of the brown wire into the turn signal connector
    For pin layouts I'm following the pin numbering @caribe makaira has in his post below which appears to be this convention:
    1. From the back, pin 1 is top right then proceed right to left, top to bottom
    2. From the front, pin 1 is top left, then proceed left to right, top to bottom
    3. Top of the connector has the tab you press to release it
    4. Therefore, the image below is looking at the connector from the front
    Molex MX150 pin layout:
    upload_2020-12-28_1-1-26.jpg
    1. Red wire from low beam +
    2. White wire from high beam +
    3. Brown wire from turn signal +
    4. Black ground from high beam -
    5. Green DRL +
    6. Pink Parking light +
    DRL connector pin layout
    1. Green DRL +
    2. Pink Parking light +
    3. Empty
    4. Empty
    For H11 and turn 2-pin connectors, I'm not sure how to clearly differentiate pin 1 vs pin 2 so your best bet is to refer to the OEM female plugs for polarity. OEM grounds are white with black stripe.

    Confirm all colors match up with the OEM harness by using the driver's side to test. If the harness works properly on the driver's side it will work fine on the passenger side as well. NOTE that wire colors may differ on the passenger side.

    Finish with flex loom and friction tape as desired.

    NOTE: This is a work in progress and details will be flushed out based on feedback and future research. Specifically:
    1. Add direct links to options for purchasing
    2. Research options for high quality H11 male connectors
    TLDR: Roughly speaking you'll spend about $40 on connectors, another $20 on pins and seals, $20-$30 on a crimper, possibly some extra costs for shipping, and $20 on wire making this a $100+ project if you come to it with nothing.
     

    Attached Files:

    Last edited: Dec 29, 2020
    Siblue, Puppypunter and Tacospike like this.
  2. Dec 28, 2020 at 12:05 AM
    #2
    daveeasa

    daveeasa [OP] Slowest crimp in the West

    Joined:
    May 14, 2020
    Member:
    #328079
    Messages:
    1,293
    Gender:
    Male
    First Name:
    David
    San Diego
    Vehicle:
    2016 OR 4x4 DCSB MGM 6MT
    This post is directed at SR / SR5 trim levels which do not have LED DRL like the Sport, OffRoad and Pros do.

    At this point in time, the recommendation is to review this thread for more information.

    In the future, I hope to edit this post and lay out a clean DIY path towards OEM LED for SR/SR5.
     
    Last edited: Jan 8, 2021
    Tacospike likes this.
  3. Dec 28, 2020 at 5:57 AM
    #3
    Tacospike

    Tacospike Semi-Unknown Custodial Member

    Joined:
    Nov 19, 2018
    Member:
    #273198
    Messages:
    6,430
    Gender:
    Male
    Quarantine A-TX
    Vehicle:
    1 Owner 16 Attitude BLK TRD Spiked Sport 3.5 Gen
    Murderface Spike Edition
    Damn dude, nice work!
     
    daveeasa [OP] likes this.
  4. Dec 28, 2020 at 9:28 AM
    #4
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    upload_2020-12-28_13-27-58.jpgupload_2020-12-28_13-27-39.jpgupload_2020-12-28_13-29-31.jpg
    Is all you need parts wise. Wire cutter and barrel crimper for tools.
     
    Tacospike and daveeasa [OP] like this.
  5. Dec 28, 2020 at 8:25 PM
    #5
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
  6. Dec 28, 2020 at 8:33 PM
    #6
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
  7. Dec 29, 2020 at 10:40 AM
    #7
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    @Puppypunter has a solution for the SR/SR5 with the combo DRL/TURN bulbs that might work for the LED headlights assemblies.
    Mine is "too much" for the non-DIY folks.
     
    Puppypunter likes this.
  8. Dec 29, 2020 at 11:02 AM
    #8
    Puppypunter

    Puppypunter Well-Known Member

    Joined:
    Jan 4, 2020
    Member:
    #315086
    Messages:
    957
    Gender:
    Male
    First Name:
    Johnny
    Vehicle:
    2019 Black SR
    But mine isn't cheap :) I just need some brave soul to try it....
    It is the same concept, but I used a HDRL controller from VLEDs to "split" the DRL and TURN signal into separate signals. It works well with the OEM LED as the DRL on them is also the turn signal, so basically a switchback anyway. The OEM lights just don't have the logic built in as the ECU does that for them.
     
  9. Dec 29, 2020 at 11:05 AM
    #9
    Puppypunter

    Puppypunter Well-Known Member

    Joined:
    Jan 4, 2020
    Member:
    #315086
    Messages:
    957
    Gender:
    Male
    First Name:
    Johnny
    Vehicle:
    2019 Black SR
    @daveeasa Nice work BTW! Now, if someone would just sell them and back them up with some good customer service.... :stirthepot:
     
    daveeasa [OP] likes this.
  10. Dec 29, 2020 at 12:29 PM
    #10
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    :crapstorm:
     
    daveeasa [OP] and Puppypunter like this.
  11. Dec 29, 2020 at 9:59 PM
    #11
    Kairide

    Kairide Well-Known Member

    Joined:
    May 20, 2020
    Member:
    #328694
    Messages:
    892
    Gender:
    Male
    Vehicle:
    2020 White SR5
    :popcorn:
     
  12. Dec 30, 2020 at 11:40 AM
    #12
    repp089

    repp089 Active Member

    Joined:
    Oct 17, 2020
    Member:
    #344063
    Messages:
    34
    Gender:
    Male
    First Name:
    Devon
    New Jersey
    Vehicle:
    2020 Silver Tacoma SX
    Have you tried out this harness? I currently own an SR and want to move up to using OEM LEDs and many people have sent me your way to test this out. I’m reluctant to mess with my trucks electrical components to say the least but i am still interested in upgrading to OR/Sport headlights.
     
  13. Dec 30, 2020 at 12:42 PM
    #13
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    5,083
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    Scary view for most here...
    upload_2020-12-30_16-38-59.jpg
    @Lt. Dangle & @metdfd can be pm'd for their "scary" story.
     
    Lt. Dangle likes this.
  14. Dec 30, 2020 at 12:53 PM
    #14
    Lt. Dangle

    Lt. Dangle RIP @stun gun 2016-2020

    Joined:
    Jan 25, 2017
    Member:
    #208645
    Messages:
    4,197
    Here
    Vehicle:
    2017 TRDOR
    RIP Stun gun bumper sticker
    I thought it was pretty easy. And fun lol. Other than Toyota using similar colors for different things (come on), pretty straight forward.

    I used the 2 pics in post #4 labeled passenger and drivers side of the wire color coding and went at it. I was more worried about scratching the new lights or breaking a tab off on install.

    I accidentally locked one of the Molex connectors and had a few head scratching moments figuring out why the plug wouldn't latch, but once that was straightened out, no problem.
     
    daveeasa [OP] and caribe makaira like this.
  15. Dec 30, 2020 at 3:56 PM
    #15
    Puppypunter

    Puppypunter Well-Known Member

    Joined:
    Jan 4, 2020
    Member:
    #315086
    Messages:
    957
    Gender:
    Male
    First Name:
    Johnny
    Vehicle:
    2019 Black SR
    I have “tried” it :D The quotes make it comforting, don’t they? Let me explain: I don’t have an LED headlight to try it on, so I made a bench test “headlight” that is just led indicator lights hooked up via the Molex connection. I know the theory is sound, as I have used a variation converting SR to TRD function, and they worked great (had to add a resistor was the only hiccup, I thought the incandescent bulb would suffice. But with the OEM LEDs, you’re going to need a resistor for sure). That harness went to @ET22 if you want to ask him about it. Anyway, shoot me a PM if you’re really interested, and we will see what we can do! And I get being nervous, those headlights aren’t cheap. That being said, if you look at the TRD to LED harnesses, they are literally just redirecting 12V, same thing I am doing. Just using the HDRL controller to separate the DRL from the TURN 12V, that’s all.
     
    daveeasa [OP] likes this.
  16. Jan 3, 2021 at 12:08 PM
    #16
    Puppypunter

    Puppypunter Well-Known Member

    Joined:
    Jan 4, 2020
    Member:
    #315086
    Messages:
    957
    Gender:
    Male
    First Name:
    Johnny
    Vehicle:
    2019 Black SR
To Top