Re: [VAC] Brake controllers - HELP?

["Don Horn" <donhorn@xxxxxxxxxxxxxx>]

Mary,

If the trailer you're buying has electric brakes, the the controller should
be wired to them through the tow connector, and if the trailer's plug has
been upgraded to the current standard wiring scheme, you're all set.

Call the seller and ask (if you don't know already):

  --does the trailer have electric brakes?
  --does the round connector have 7 flat pins or 7 round pins?
  --if it has 7 flat pins, is it wired to the current standard?
  --when was the last time it was towed?
  --did the brakes and all the lights work then (if recently)?

If it's not the current standard, but does have the standard 7-pin round
plug with flat connectors (possible, but not likely), then all you need to
do is re-wire it to match your vehicle plug.  You'll have to test it, and
only about 3 wires will have to be moved.

If it has a 7-pin round plug with round connectors, you'll need to bring a
new female plug with you that matches your tow vehicle, and put it on the
trailer, testing each wire.

In any case, you should also bring a copy of the wiring diagram for the
connector on your vehicle, so you know what functions belong to which pin.
Even if the seller *thinks* the trailer is wired to the standard, you may be
surprised and have to do some rewiring.  If you *know* it's not standard,
then you'll definitely need the diagram to help you match up the wires.

If the trailer has no brakes, and the wiring is uncertain, you could buy a
set of temporary towing lights with wiring harness to match your vehicle,
and duct tape them to the back of the trailer, just to get home.  (Probably
a last resort effort)

If you'd rather not do any of this yourself, try to find a trailer or hitch
shop near the seller, and make an appointment to have them check all the
wiring and fix as necessary.  You'll probably get it done cheaper (and
better) if you look for a non-RV place (horse and utility trailers, hitch
welders, etc).  If all you need is rewiring or replacing the trailer plug,
it should only take about 1/2 hour for an experienced professional trailer
repairperson.

Don