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  • Third brake light 7-Way Interface plug-in T Harness - 300200
    Collection Truck Cap Wiring Harness
    Product Type Wiring Harness
    Vendor Leer
    California Prop 65 View Warning


    Third brake light 7-Way Interface plug-in T Harness - 300200

    • $ 137.99

    2015-2024 Ford F150, 2016-2024 F-250/F-350 and 2016-2024 Toyota Trucks (Tacoma and Tundra) #300200


    Frequently Asked Questions

    Q: What is the difference between the 300200 & 300100?

    A: 300200 is for the newer Fords and Toyotas that require external power source due to the smart towing system.It includes extra wire to run to the battery which is why there is more cost to it. The 300100 fits pretty much everything else
    Q: It is for a truck cap with LED center stop light?
    A: Yes.


    Q: Does the Wiring harness provide full-time hot wire power to the dome light on a topper?
    A: Yes.

    Q: Does this install in behind the bumper so that it's concealed and the external bumper mounted plug still operates? Or does this connect to the external bumper plug itself and T from there?

    A: Yes, they both install behind the bumper so that you can still use the external plug for your trailer and not affect usability
    Q: I understand how the seven way connects into the wiring behind the bumper, but my brake light on the camper has only two wires. How will those connect to the four way plug?
    A: There are 2 different style connectors in the package a 6 pin for the Leer fuse box and a 4 pin for the rest of the brands. You will insert the wires into whichever connector you need to match your top 

    Q: Will the 7 way harness Leer part 300200 work with a ford F150 lightning?
    A: Yes, it does if it is newer than 2015
    Q: Do you have wiring to hook up the topper power lock to factory tailgate power lock?

    A: no, all these harnesses do is brake and dome light - 12volt auxiliary

    Customer Reviews

    Based on 20 reviews
    Steven Trumpower
    A little pricy but quality product!

    I choose the Leer 300200 for my Tundra as I didn't want to tap into my brake lights. Running the 12V power supply from the battery was the most time consuming part. Otherwise it was a simple installation. Works great!

    Alexander Barnes
    Don’t need it

    Can I return the harness I ended up not needing it

    Dwight Dooley
    Easiest option out there!

    I definitely recommend this product. Very easy and gives you a plug and play option that allows you to simply disconnect and reconnect if removing and returning the cap. No splicing!

    Chris White
    Fast shipping and great product

    Only way it could be easier is if they installed it. It worked great!

    Russell Mcinvale

    Worked perfectly

    2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 3rd 7-way brake light ford Ford F150 Ford F250 Ford F350 Leer third Toyota Toyota Tundra