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Switching 7 pin to a 4 pin

Discussion in 'Towing' started by txduckhunter, Jan 18, 2012.

  1. Jan 18, 2012 at 6:26 PM
    #1
    txduckhunter

    txduckhunter [OP] Well-Known Member

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    Hey all. I have an 08 V6 Dc 4x4 Taco and it came with the 7 pin connection.

    I was planning on just using one of the adapters that plugged in to it but this weekend I backed over a tool box while visiting the family that my brother left behind my truck on the ground and it basically broke off my 7pin.

    I only use a 4 pin anyways to pull my boat and am wondering if I should just replace the 7 and get an adapter or take it off and wire in a 4 pin.

    Could I wire a 4 pin on to the existing wires? Anybody done this?
     
  2. Jan 18, 2012 at 6:32 PM
    #2
    duckcmdr

    duckcmdr If it flies it dies!!

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    I have a spare one oem 7 pin wuth the lp light .wires to.
     
  3. Jan 18, 2012 at 6:34 PM
    #3
    Tacoma Mike

    Tacoma Mike 42 Year Toyota Master/ASE Master Tech.

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    Fix the 7 pin as before. use an adapter. You never know when you might need it. Can you wire up a 4 pin?? sure.. fix it right.. :)
     
  4. Jan 18, 2012 at 6:34 PM
    #4
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    I'd keep the 7 pin. You can always dumb down a 7 pin to a 4 pin, you can't turn a 4 pin into a 7 pin if you ever need it in the future.
     
  5. Jan 18, 2012 at 6:44 PM
    #5
    LostRebel

    LostRebel Well-Known Member

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    :eek: Your brother left his family where?

    I've not done it, but I don't see why you can't direct wire a 4-pin connector as long as the wires from the 7-pin provide the proper output. There may be more to it though. I have wired a 4-pin onto a Tacoma that was not pre-equipped with a wiring harness and the 4-pin harness contained an isolation unit of some type. A few minutes with a test light might provide the answer.
     
  6. Jan 18, 2012 at 6:49 PM
    #6
    jflan

    jflan Well-Known Member

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    Don't mess with the truck's trailer harness.
    Just get a 7-pin to 4-flat converter plug.
     
  7. Jan 18, 2012 at 7:24 PM
    #7
    txduckhunter

    txduckhunter [OP] Well-Known Member

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    Well it looks like I'm going to just put another 7 pin on. Maybe I can find one of the ones that has a 7 and 4 at a parts store tomorrow. I gotta get it set up to tow the boat Friday when we hit the water!
     
  8. Jan 18, 2012 at 7:44 PM
    #8
    jflan

    jflan Well-Known Member

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    Save your 7-pin. You may want to pull something that has trailer brakes someday.
    Then just get the adapter as I outlined above.

    Pollack #12-705 is a good aftermarket substitute for the plug on the vehicle. You might have to fabricate a bracket.

    I have seen this "combo" plug arrangement but it was an issued Toyota setup on a Tundra, I believe.
     
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