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Seat heater installed using yellow wire in driver side harness

Discussion in '2nd Gen Tundras (2007-2013)' started by bigz, Jan 13, 2025.

  1. Jan 13, 2025 at 5:41 PM
    #1
    bigz

    #1
    bigz [OP] New Member

    Joined:
    Jan 12, 2025
    Member:
    #128757
    Messages:
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    Male
    Hi thanks in advance,

    I got my dad's 2012 Toyota Tundra SR5. He had seat heaters installed, but they no longer work. I have spent too much time taking stuff apart, but learned a lot about the truck. Anyway, the seat heater for both driver and passenger seats appear to be aftermarket, and they were being powered off a yellow wire in the harness that runs along the door jams. The yellow wire is completely dead now. I can't figure out what it is for, but the only thing not working in rear passenger door is the speaker. (lock and window are working)

    This is a two parter: 1) what is the yellow wire used for? 2) what is the best wire to use in this truck to power seat heaters?

    20250111_223852695_iOS.jpg
     
    bigz, Jan 13, 2025
    #1
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