Re: Skip, Trailer 7 way wiring

["Joel M Brodsky" <jmbrodsky@xxxxxxxxxxxx>]

Skip,
the 12V line is a spare service power line if you want to hook up backup
lights or something else that needs 12V.  Leave it blank if you don't need
it.  No sense leaving power out there if it's only going to cause problems.
Sometimes small interior lights in the trailer are wired to that line.
It's just a hot line from the truck.

JoelB


Thanks Joel & Jim...  Good advise.

Another quick question...  The #4 wire just says "12V" on the wiring
diagram.  Would that mean I just run a hot wire to that one?  Or, does 12V
have another meaning in trailer-wiring-ese?

Thanks!

----- Original Message -----
From: "Joel M Brodsky" <jmbrodsky@domain.elided>
To: <ihc@domain.elided>
Sent: Tuesday, August 05, 2003 4:04 PM
Subject: Skip, Trailer 7 way wiring


> Also, if you ever get the 7-wire to 6-wire adapter (My flatbed has both 6
> and 4 wire), be sure that you move the wires in the adapter so that the
> brakes on the 6-wire aren't wired to the center pin on the 7-wire.
> Basically, the center pin (as Jim mentions) should be Acc. power, NOT
> brakes.  When I bought the adapter the brakes on my 6-wire trailer were
> fully applied.  The adapter has screwlugs internally so that you can move
> the ACC. Power and Brake leads so that this doesn't happen.  Funny, those
> are the only screw terminals in the adapter, apparently this is a common
> mistake.
>
> FYI:
>
> JoelB
>
> Date: Mon, 04 Aug 2003 16:28:15 -0700
> From: J Grammer <jim@domain.elided>
> Subject: Skip's trailer plugging away
>
> At 06:15 PM 8/4/03 +0000, you wrote:
> >Also, what is the best way to wire the 7-way plug receptacle I just
bought
> >for trailer lights?  Is it OK to just splice into the wires (blinkers,
> >brakes, etc) and run off them?  Will the load be too much when I plug in
a
> >trailer?  Or, is there a better way, with relays or something like that?
>
> Yes, relays are a much better way.
>
> Nobody does it tho'. Not even those of us who talk about it ;)
>
> Just do a workmanlike job of the wiring and follow the convention for
> wiring the plug please. I have to re-do the plug on a friend's horse
> trailer every time we borrow it 'cause some 'professional' hitch
installer
> decided that the center terminal on a 6-way was for the trailer
> brakes(should be trailer acc. power). Guess I better re-wire her truck
one
> of these decades....
>
> Avoid the scab-on connectors like the plague!
>
> Kudos for running 7-way, they're a more durable long term design than
> 6-way.
>
> Jim