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2021 Tacoma Brake controller wiring harness

Discussion in '3rd Gen. Tacomas (2016-2023)' started by Taco20212017, Apr 2, 2024.

  1. Apr 2, 2024 at 4:39 PM
    #1
    Taco20212017

    Taco20212017 [OP] Member

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  2. Apr 2, 2024 at 4:42 PM
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    Taco20212017

    Taco20212017 [OP] Member

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    Here, blue wire is connected to black, and black wire is connected to blue. Does anyone have a picture of the Tacoma brake controller harness?
     
  3. Apr 2, 2024 at 6:38 PM
    #3
    caribe makaira

    caribe makaira Well-Known Member

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    Check your towing wires and connector under the Taco and under the tailgate area. Could've been a short, got wires hot.
     
    Stevie17 likes this.
  4. Apr 2, 2024 at 6:43 PM
    #4
    caribe makaira

    caribe makaira Well-Known Member

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    upload_2024-4-2_21-39-39.png
    Blue at vehicle side is fused power 40 amps (always juiced/hot)
    Black is to trailer electrical brakes
    Green is Dash/Tail illumination (Brake controller)
    White with Black stripe is ground (Brake controller)
    Violet is Brake signal input (Brake Controller)
     
    Stevie17 likes this.
  5. Apr 2, 2024 at 6:46 PM
    #5
    caribe makaira

    caribe makaira Well-Known Member

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  6. Apr 2, 2024 at 7:18 PM
    #6
    Taco20212017

    Taco20212017 [OP] Member

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    Thanks! So the wiring harness is correct. Blue connects to black, and Black connects to Blue. So the truck doesn't start. Does the warranty cover this issue? Is the dealership going to fix this issue?
     
  7. Apr 2, 2024 at 7:20 PM
    #7
    caribe makaira

    caribe makaira Well-Known Member

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    The wiring from the Taco is correct. The wiring from the Towing Brake module (visually) seems incorrect. I do not think the dealer will cover the meltdown.
     
    Chew likes this.
  8. Apr 2, 2024 at 8:05 PM
    #8
    Taco20212017

    Taco20212017 [OP] Member

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    What do you mean by visually incorrect?
     
  9. Apr 2, 2024 at 8:19 PM
    #9
    Chew

    Chew Not so well known user

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    Warranty is cover manufacturing defects, sorry, this is not one of them. It’s tough enough to get them to cover what they should.
     
  10. Apr 2, 2024 at 8:29 PM
    #10
    caribe makaira

    caribe makaira Well-Known Member

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    wire colors do not mate. But colors do not necessarily correlate to the circuit they are attached to. (Worker could've inserted first color he saw, not following assembly guide)...
     
  11. Apr 2, 2024 at 8:36 PM
    #11
    2021SR5V64WD

    2021SR5V64WD Well-Known Member

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    I have this older style... the 902502 and I just plug into my 12v and away I go.
    Was a bit surprised when I first hooked up the little camper to the truck, plugged in the 7 pin, plugged to the 12v, and
    it worked right off the bat. Not as slick as the new-fangled setups but it works like a champ.

    upload_2024-4-2_20-33-38.png
     
  12. Apr 3, 2024 at 11:28 AM
    #12
    Taco20212017

    Taco20212017 [OP] Member

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