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 Member
  
  Posts: 8
 
  | I have the electronic brake, from my old truck. However the convertor stayed attached to the bumper of the truck when it was traded.  My question : should I hard wire the new 7 pin connector or can I purchase the kind that plugs into the 4 pin (with hardwire ground and battery) to be able to use the 4 pin if I ever need it. I've only have just started seeing the 9 into 4 convertors like the one at the bottom of the link i've attached http://www.go-rv.com/coast/do/catalog/page?pagePrev=TRUE&dealerId=320&pageNum=506 What I'll be towing - motorcycles, horses either way i'll be in the gross towing weight of an expedition  | 
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 Expert
  
  Posts: 2959
          Location: North Carolina | As I understand your post , your vehicle has a 4 pin flat Plug.  You need the 7 pin round Plug for brakes and aux power circuit. If you purchase the 7 /4 pin connector as in the link, It comes with a 4 pin flat plus bare wires for the brakes and power.  You'll have to disconnect its flat plug to use 4 pin flat plug trailers.  Sounds terribly inconvenient.   I would hard wire the new 7 pin connector.  Change all the trailer plugs to 7 pin and only use 4 if the trailer doesn't have brakes.    | 
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 Expert
  
  Posts: 3802
        Location: Rocky Mount N.C. | http://www.horsetrailerworld.com/home/wiring.asp    | 
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 Member
  
  Posts: 8
 
  | Yes, you understand my question.  Since I know nothing about hardwiring, I 'll drop off the truck to my mechanic and have him do it.  I am thinking if I purchase the kit, it should not be much of a cost.  -or- do you think it is the same quality of work if I take it to the Uhaul dealer and have him install it and purchase the wire harness there. | 
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 Regular
  
  Posts: 70
    Location: Temecula, CA | As the experts have stated, your better of to hardwire a new plug in.  It will make your life alot easier and will justify the means..............!!!!!!!!!!!!!!! | 
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