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Possible to run a 4 prong harness with a shell’s 3rd brake light?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Cutter_, Jun 13, 2019.

  1. Jun 13, 2019 at 7:38 PM
    #1
    Cutter_

    Cutter_ [OP] Well-Known Member

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  2. Jun 14, 2019 at 9:43 AM
    #2
    Cutter_

    Cutter_ [OP] Well-Known Member

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  3. Jun 14, 2019 at 4:18 PM
    #3
    02-5Lug

    02-5Lug Member

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    I would hook up the 5 wire to four wire adapter for the trailer and use a separate plug hooked straight to the truck’s brake light circuit for the third brake light on the camper shell.
     
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  4. Jun 14, 2019 at 4:27 PM
    #4
    RysiuM

    RysiuM Well-Known Member

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    Both are for American cars sharing stop light bulbs with blinkers. Tacoma has separate Blinker and Stop light bulb. So both harnesses are useless (or overkill).

    Like @02-5Lug wrote, juts splice the wire in the trailer adapter going to your left (or right) stop light bulb and connect it directly to the third brake light. Third brake light designed for camper shells is usually LED so it takes minimal current. Will not overload fuses (trailer is the separate story).
     
  5. Jun 14, 2019 at 4:36 PM
    #5
    jbrandt

    jbrandt Well-Known Member

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  6. Jun 14, 2019 at 5:20 PM
    #6
    02-5Lug

    02-5Lug Member

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    The red wire on the upstream side of the 5 to 4 is the brake light, tap into it right there for the third brake light
     
    Last edited: Jun 14, 2019
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  7. Jun 14, 2019 at 5:21 PM
    #7
    02-5Lug

    02-5Lug Member

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    Bingo
     

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