Yep,  most common for RVs.
Have to have working brakes on everything.

From: Nate Burke 
Sent: Tuesday, August 07, 2018 7:36 AM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] OT Trailer plug hell

I might be wrong, but I think he means 7 flat pins in a round configuration, as 
opposed to 7 round pins in a round configuration.

What does UHaul Use for pin configuration?  I figure that those trailers make 
it from coast to coast on a weekly basis, so whatever they do is probably the 
most standard.  


On 8/7/2018 7:53 AM, Mike Hammett wrote:

  I don't think I've ever seen 7 flat.




  -----
  Mike Hammett
  Intelligent Computing Solutions

  Midwest Internet Exchange

  The Brothers WISP






------------------------------------------------------------------------------

  From: "Chuck McCown" mailto:ch...@wbmfg.com
  To: "AnimalFarm Microwave Users Group" mailto:af@af.afmug.com
  Sent: Monday, August 6, 2018 9:39:43 AM
  Subject: Re: [AFMUG] OT Trailer plug hell


  7 pin flat seems to be on almost everything around here except for the semi.  
It is round.  But the wiring pinout of the connectors are diffferent.

  I think I am going to make come kind of comprehensive test box that has the 
plug, socket.  Lights on each wire and a switch to energize each wire.  

  From: Mike Hammett 
  Sent: Monday, August 06, 2018 8:33 AM
  To: AnimalFarm Microwave Users Group 
  Subject: Re: [AFMUG] OT Trailer plug hell

  7 pin round is what's most common, but then there are different pinouts. 
What's "common" isn't so common.




  -----
  Mike Hammett
  Intelligent Computing Solutions

  Midwest Internet Exchange

  The Brothers WISP






------------------------------------------------------------------------------

  From: "Chuck McCown" mailto:ch...@wbmfg.com
  To: "AnimalFarm Microwave Users Group" mailto:af@af.afmug.com
  Sent: Monday, August 6, 2018 9:29:59 AM
  Subject: Re: [AFMUG] OT Trailer plug hell


  I have to do 7 pin round for the semi.  I am planning to do 7 pin flat for 
everything else.
  But I want the wiring to be the same and I want it to be as common to other 
things as possible.  

  I wish there were standards.  

  From: Cameron Crum 
  Sent: Monday, August 06, 2018 8:26 AM
  To: AnimalFarm Microwave Users Group 
  Subject: Re: [AFMUG] OT Trailer plug hell

  They make adapters to go between. I find the old 4 prong to be the most 
common on the trailers I have used/rented. My truck came with both a 7pin and a 
4 pin jack already installed, but it also has a stock trailer brake control. 

  On Mon, Aug 6, 2018 at 9:15 AM, Chuck McCown <ch...@wbmfg.com> wrote:

    I have a bunch of trailers and a bunch of trucks.  I even have a semi truck.
    Is there a wiring orientation that is more used than the others?  
    I have found so many different socket and plug diagrams that I find it 
amazing that it has never been standardized.  

    I am going to build a converter so I can plug the semi tractor into some of 
my other trailers that the the flat blade connectors.
    It will take an electric brake controller in the semi and some kind of 
diode box to combine some of the lines.  Those are available on the retail 
market.

    But the number of connections and the wiring of the connections seems all 
over the map.  

    Opinions please.  



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