4 pin trailer 7 pin truck

Discussion in 'Trucks and Trailers' started by Patatoe1, Mar 22, 2007.

  1. Patatoe1

    Patatoe1 LawnSite Member
    Messages: 111

    Hey all have a couple questions. Both of my trailers have four pin connectors.
    My '02 F-150 has the four pin connection
    My '07 F-150 has both the four pin and seven pin connection
    But my '03 F-550 only has the seven pin connection

    How do I go about setting either the trailers up to be able to hook up to both four and seven pin connections? Or how do I go about setting the F-550 to accept four pin connectors?

    Hope that made sense.:)
  2. cet

    cet LawnSite Member
    from Toronto
    Messages: 89

  3. bigshoe

    bigshoe LawnSite Member
    Messages: 148

  4. FearThisDeere

    FearThisDeere LawnSite Bronze Member
    Messages: 1,154

    A 7 to 4 adapter for the F550 only is what you need. No big deal. They are cheap and work well. A 4 pin plug does not have brakes.
  5. Patatoe1

    Patatoe1 LawnSite Member
    Messages: 111

    I love sites like these. I knew what I needed, but the places that I had called around to had no idea what I was talking about. Thanks guys.

    One more question. I am correct when saying seven pin right? Is there something called a six pin too?
  6. bigshoe

    bigshoe LawnSite Member
    Messages: 148

    Yes there is a six pin also look on the link I provided earlier it shows it.

  7. beano

    beano LawnSite Senior Member
    Messages: 425

    There is a 6 pin but most trucks and trailers have 7 pins. You can go to any trailer store and buy an adapter. Not a big deal at all. You might be able to find one at wal mart even!
  8. corey4671

    corey4671 LawnSite Silver Member
    Messages: 2,931

    any place like autozone will have em but check EBAY! i have a seven pin on my truck and my trailer is six pin.
  9. Lynden-Jeff

    Lynden-Jeff LawnSite Bronze Member
    Messages: 1,405

    I just got a 7 pin trailer. The guy at the place gave me a good idea. He gave me a 7 pin plug and gave me the wiring diagram. Im pretty sure its a universal thing so i will post it here, if some one wants to correct me that would be good.

    Wire: Terminal:
    Green >>> Brown
    Brown >>> Green
    Yellow >>> Red
    White >>> White

    I have not tried it but im pretty sure it will work. Now I have 7 pin on both my trailers. WAY better then crappy old 4 pin.

  10. grandview (2006)

    grandview (2006) LawnSite Gold Member
    Messages: 3,465

    If you have to go to Walls-Mart.

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