[AT] @!#%^% Trailer Wiring

[David Myers]

--- Len Rugen <lrugen at c-magic.com> wrote:

> This is one of the sites that I used, and I think
> one of the "correct" ones.
> 
> However, look closely at the 6-wire connection.  You
> are viewing the car end
> from the rear of the car and the trailer end from
> the front of the trailer.
> But you see the wires, so some intrepret it
> completely backwards....  sigh.
> 
> It has two DIFFERENT 6-wire diagrams. But on closer
> study, they are the
> same.  The difference is the view is reversed and
> the wire colors are
> different.  Sigh....

Len, I work with these different systems almost
everyday, what a pain in the neck (and just about
every other place).  There are several different
standards out there, ISO, SAE, Commercial, RV, and
probably others.  The two I use most are 6 pole round
commercial (heavy trucks) and 6/7 pole RV.  The 6 pole
commercial has a BRAKE LIGHT circuit as well as a
clearance light circuit.  The 6/7 pole has an ELECTRIC
BRAKE circuit, no clearance light circuit, and for the
7 pole a charge circuit (on the side) and an aux
circuit (like for a back-up light) in the center. 
Only problem with the RV style is color coding, and
please don't ask which is ISO and which is SAE, I
don't know (or care).  The bright side is that RV
FUNCTIONS are all in the same place.  
Way to many variances for my taste, but what's a
feller to do?
A couple of my trucks have two different 6 pole round
plugs for pulling a commercial trailer (air brakes) or
our hydrovac trailers (electric brakes).  And my wife
wonders why I sometimes come home going "Blither,
Blither, Blither".  To quote Pooh Bear, "Oh bother".


=====
Dave Myers
Paw Paw, Michigan

Being crazy just helps me keep my sanity!


		
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