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There are 3 different flavors of the 7-pin connector. Most
trailers use what is sometimes referred to as 7-pin common.
The flat 4-pin will not accommodate a trailer brake controller.
You need at least a 5-pin to do the trailer brakes.
https://en.wikipedia.org/wiki/Trailer_connectors_in_North_America
bp
<part15sbs{at}gmail{dot}com>
On 8/6/2018 7:15 AM, Chuck McCown
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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