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5.7l Crewmax with factory brake controller question

Discussion in '3rd Gen Tundras (2014-2021)' started by AirSchatz, Jul 19, 2020.

  1. Jul 19, 2020 at 1:14 PM
    #1
    AirSchatz

    AirSchatz [OP] New Member

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    I would like to replace my factory brake controller, which did not work with my trailer, with the Tekonsha P3, I have the controller and need a harness to plug into the Tundra wiring. Is there such a creature?
     
  2. Jul 19, 2020 at 1:24 PM
    #2
    AZTundra

    AZTundra No Longer a New Member

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    Magnuson Supercharger, TRD Goodies (Pro Suspension, Pro Grille, Exhaust, CAI, Rear Sway Bar, Oil Cap). Weather Tech Floormats, BakFlip MX4, Spray In Bedliner, AMP Research Bed Extender and Bed Step, Side Steps, B&W Adjustable Drop Hitch, AJT Designs Battery Hold Down, SDHQ Sliders.
    Yes, there are harnesses to connect the p3 to the Tundra.
     
  3. Jul 19, 2020 at 1:27 PM
    #3
    AZTundra

    AZTundra No Longer a New Member

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  4. Jul 19, 2020 at 1:30 PM
    #4
    AirSchatz

    AirSchatz [OP] New Member

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    Forgot to mention this is a 2018 Limited Tundra. I bought the 3031-P harness, but it does not match the tundra. The tundra side has a bunch of wires, but the controller only has 4 wires. Can I tap into the existing tundra harness with the wires from the adapter harness?

    Does anyone have a pinout for the 2018 Tundra trailer brake wiring plug?
     
  5. Jul 19, 2020 at 2:02 PM
    #5
    AZTundra

    AZTundra No Longer a New Member

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    I believe you need the 3040p
     
  6. Jul 19, 2020 at 3:11 PM
    #6
    HTGreen

    HTGreen New Member

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    I thought you had to do a cut and splice for the 2018 and later Tundra because of the two piece unit. The dash unit and the passenger lock panel unit.
     
  7. Jul 19, 2020 at 3:13 PM
    #7
    AirSchatz

    AirSchatz [OP] New Member

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    There's another part to the brake controller? I removed the actual controller, just below the "TOW/HAUL" button, where is the passenger lock panel unit located?


     
  8. Jul 19, 2020 at 3:18 PM
    #8
    HTGreen

    HTGreen New Member

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    I haven't seen it personally, just recall reading about on here, someone replaced their unit with aftermarket and another had it replaced under warranty. You will need to search for the threads.
     

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