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Taillight harness adapter? Need help! Wiring

Discussion in '3rd Gen. Tacomas (2016-2023)' started by HairyTacoEater505, Mar 2, 2025.

  1. Mar 2, 2025 at 8:12 PM
    #1
    HairyTacoEater505

    HairyTacoEater505 [OP] New Member

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    Hello, I’ve had this account for a little while but haven’t posted. I recently purchased a rear light bar with break, turn, b/up lights, I don’t want to splice into the factory wiring so I was wondering if there is an adapter that plugs between factory harness connection that I can splice into. I’ve searched but didn’t find what I was looking for so sorry if this has already been discussed, just looking for someone to point me in the right direction, thanks in advance.
     
  2. Mar 2, 2025 at 8:33 PM
    #2
    Jsevert2023

    Jsevert2023 Toyota service writer

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    I just made one today. Yours would be alot more complicated. Mine is brake and running light. Maybe i can put a couple together , it would have to be one for each tailight because of turn signals. 20250302_073727.jpg
     
  3. Mar 2, 2025 at 8:39 PM
    #3
    HairyTacoEater505

    HairyTacoEater505 [OP] New Member

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    Oh wow that’s awesome, I’d buy a couple possibly 4 if you’re able to the same for a 2025 Tacoma also
     
  4. Mar 2, 2025 at 8:50 PM
    #4
    Matt Sierra

    Matt Sierra Well-Known Member

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  5. Mar 2, 2025 at 9:15 PM
    #5
    Jsevert2023

    Jsevert2023 Toyota service writer

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    I could probably make a set if it's for a 3rd gen. It would be 4 harnesses.... reverse, brake and running, and 1 for each signal... I'll look into it the next couple days and get back to you.
     
  6. Mar 2, 2025 at 9:40 PM
    #6
    Puppypunter

    Puppypunter Well-Known Member

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    @Jsevert2023 is correct, you will need 4 harnesses to accomplish that on a 3rd gen. Do you have a picture of the light bar connection? Making something plug and play should be pretty straightforward. If @Jsevert2023 doesnt end up doing it for you, feel free to shoot me a PM. I have everything you’d need and can most likely mate to the light bar.
    @Matt Sierra is on to a good starting point for the 4th gen, but the issue with the 7 pin is you are going to have a combined brake and turn signal. Your taillights are this way as well, so either way you go, you will need to separate those two if you require an isolated brake and turn signals. The ones I’ve made for some of the 4th gen’s have used Curt controllers to split the brake from the turn signals. Still all plug and play, but some added hardware unfortunately. If you’re untested though, feel free to shoot me a PM as well. I’ve been doing these for a while now. It’s all crimped connections with 18g TXL (or larger, depending on what we are tapping) wire and OEM equivalent connectors.

    For what it’s worth, the 2nd gen is the easiest as everything is in one plug. You still need two if you’re grabbing the turn signals, but it’s nice to have brake, parking, ground, reverse, and one turn all right there.
     
  7. Mar 2, 2025 at 9:42 PM
    #7
    Puppypunter

    Puppypunter Well-Known Member

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    Also, not trying to step on any toes here, sorry if it came across that way. I can point you in the right direction for connectors if you need it. I don’t mind helping at all :)
     
    Jsevert2023[QUOTED] likes this.
  8. Mar 2, 2025 at 9:59 PM
    #8
    Jsevert2023

    Jsevert2023 Toyota service writer

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    @Puppypunter you were my inspiration! I didn't know you were around. I found your website and since it was closed I dove into the rabbit hole. Please help the guy out! I have tubs i have to dig through at work. Save me the trip!
     
  9. Mar 2, 2025 at 10:06 PM
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    Puppypunter

    Puppypunter Well-Known Member

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    :rofl:I love a DIY attitude! If you ever want to learn how I do it, feel free to hit me up! A basic crimper isn’t expensive and will do most of what you need it to do. And parts aren’t terribly hard to find either. Most are available state side, and the company I order from a lot will sell you a whole kit, so connectors, terminals, and seals.

    Dave ran the website, so it’s kind of in limbo right now, but I really should do something with it. But in the meantime, if anyone needs anything, feel free to hit me up
     
    Jsevert2023[QUOTED] likes this.
  10. Mar 2, 2025 at 10:55 PM
    #10
    CT Yankee

    CT Yankee Well-Known Member

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  11. Mar 3, 2025 at 4:00 AM
    #11
    AvalonTaco

    AvalonTaco Falken Sales Rep.

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    I need reverse tap only for a rear facing plow light. That should be easier. Any existing known products or just tap at the light housing?

    Edit

    Looks like the Hotshot adapter would work well.
     
    Last edited: Mar 3, 2025
  12. Mar 3, 2025 at 6:16 PM
    #12
    soundman98

    soundman98 Well-Known Member

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    Yes, there is. Curt makes one. I'm using it for my opt7 bar. It plugs into the trailer harness.

    https://www.amazon.com/gp/aw/d/B007EA6WQU

    Only weird part is it includes a 5-pin breakout connector while most bars only include a 4 pin connector with a white bare wire for reverse. I cut the white off the 5 pin and spliced it in separately
     

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