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Trailer Plug Wiring Question

Discussion in 'Trucks and Trailers' started by trip5981, Apr 1, 2010.

  1. trip5981

    trip5981 LawnSite Member
    Messages: 8

    Hello, I have a 06 Ford F-250 SuperDuty Diesel. Im wiring a 7 plug trailer harness on a trailer. The truck came factory with a 7 & 4 plug hook on the back. The problem I am finding is I only have power to 4 of the 7 wires on the back of the truck (brake, signals, & markers/tails). I feel like I am missing something as simple as adding a fuse but I'm looking for input from you guys that probably know. As always Thanks in advance.

  2. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837

    batt aux and ground are the rest you may need a fuse. The trailer fuse is under the hood its a small fuse
  3. trip5981

    trip5981 LawnSite Member
    Messages: 8

    Battery Aux, and the reverse option were the 2 that I know I didnt have power to. Im working on getting the brake controller installed so I wont know if it works until then.
  4. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837

    battery, aux, and the ground batt and aux are two different landings
  5. trip5981

    trip5981 LawnSite Member
    Messages: 8

    Theres marker, 2 signal, brake, reverse option, ground, & aux power to charge the break away battery right? I think I left a comma out on the last post sorry.
  6. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837


    Break away has no battery. Battery is for electric brakes that the break away sends a signal too in a nut shell there is also a aux for say back up lights or camera that is not wired from the factory. Break away is just a steel cable that pulls a plug that allows the breaks to complete a circuit to the battery.
  7. Petr51488

    Petr51488 LawnSite Silver Member
    from NJ
    Messages: 2,370

    The constant hot will charge your battery on the trailer. It won't give it full juice in a few hours, but it will slowly charge it... almost like a trickle charger. Also the hot wire will provide you with interior lights when the truck is not on but trailer is connected.
  8. JS&L

    JS&L LawnSite Member
    Messages: 20

    actually the battery is only there for the break away!

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