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Trailer Wiring

Discussion in 'The Garage' started by ProJunkRacing, May 27, 2006.

  1. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    Hey I am wiring my trailer and I got a wiring kit . It came with lights all the stuff for the 4 flat wire connection. well I bought the connector for my Gmc the 7 way plug since it has electric brakes . but it seems the kit wiring differs from the cover on my truck that says what wire is what , well the plug seems to have all the connections but yellow? wtf i hav aux left, blue ,red,and black i need help anyone got a link to a good tech writeup on wiring trailers. also i hear that the ball serves as a groun and trailer must be connected is this true? also help wite elec brake wiring please thanks
     
  2. 73k10sub

    73k10sub 1/2 ton status

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    Ground

    I can't help with the 7 plug stuff since I only have six. You should be able to buy a 7 to 4 adapter plug at WallyWorld or a trailer place.
    NOTE: Do not rely on the trailer hitch being on the ball for a reliable ground - it won't! Ground both the tow vehicle and the trailer for reliability.
     
  3. Dallin

    Dallin 1/2 ton status

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    Here is a pretty good writeup on trailer wiring:

    http://www.marksrv.com/wiring.htm

    I agree with 73K10sub. Don't use the ball for a ground. Sometimes it works, but it is a bad idea.
     
  4. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    well that is pretty good that helps alot
     
  5. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    ok another question one wire is for battery well my trailer has no battery , it has breakaway switch but no battery ,any one know of place to find good diagram for the brakes end of it i am completely rewiring it
     
  6. Muddytazz

    Muddytazz 1 ton status

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    A lot of times, if you go up to your local U-haul and talk to the hitch install department, you can get a wiring diagram that fits your needs.
     
  7. HarryH3

    HarryH3 1 ton status Author

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    Walmart sells a trick trailer socket for mounting on the tow rig. It has a 7 prong outlet AND a 4 prong outlet built into the same connector. Very slick setup. With it you don't have to worry about losing the 7-to-4 pin adapter that you otherwise need for towing smaller trailers. :cool1:
     
  8. 73k10sub

    73k10sub 1/2 ton status

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  9. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    dude that is trick thanks so much
     

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