Trailer Towing Guide

 

TRAILER GUIDE

&

TRAILER BRAKE CONTROLLER INFORMATION

SOUTHEAST ARIZONA RV RENTALS

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Trailer Brake Controller Information

ALL OUR TRAILERS UTILIZE THE 7 PIN ROUND TYPE OF ELECTRICAL CONNECTION, However this type connection is not necessary for our Tear-Drop and Pop-Up Trailers. You may use either the 7 Pin Round connector OR the Flat 4 Pin connection for the Pop-Up Camper. The Tear Drop trailers use the flat 4 pin only.

The common flat 4 wire connector used on boat, snowmobile, and light utility trailers most commonly uses the following code and looks like this.

Flat 4 wiring code
white ground
yellow left turn/brake light
green right turn/brake light
brown tail

Factory installed wiring harnesses frequently match the flat 4 colors.

All our Travel Trailers utilize this type of Plug Connection.

7 Way RV Connector
Pictured above & below is the Pollak (also known as the Bargman) 7 way connector, which is the connector style in most common use on RV trailers and is becoming increasingly popular on horse and utility trailers. This connector is also manufactured by the Theodore Bargman Company and there are also some generics around. They are supposed to be interchangeable and the wiring color code is maintained among the various brands.As you can see in the illustration below the back side of the connector body is labeled at each terminal. The labels are listed below with the function assigned to that pin.

On the tow vehicle side with the exception of 96-98 Ford and Dodge pickups and SUV’s with factory installed trailer wiring, wire color alone should not be relied on, always test and match the function to the appropriate terminal.

On the trailer side RV’s for the most part are wired to match the connector colors. Any plug that has been changed or extended, along with horse and utility trailers should be tested when replacing for any reason to be sure the function matches the terminal.

It should be noted below that the center terminal is labeled as an auxiliary circuit, most commonly used for backup lightsnot a ground terminal as many try to make it.

Also after the connector diagrams find more information on wire colors used by GM, Ford, and Dodge.


Wiring Code 7 way TRUCK /Car End
# Color Gage Circuit Function connector interior
1 white 10 common ground
2 blue 12 electric brake
3 green 14 tail/running lights
4 black 10 battery charge (+)
5 red 14 left turn/stop
6 brown 14 right turn/stop
7 yellow 14 auxiliary/back up
NOTE: #7 is the center terminal and currently is most commonly used for backup lights.
Wiring Code 7 way Trailer End
# Color Gage Circuit Function connector interior
1 white 10 common ground
2 blue 12 electric brake
3 green 14 tail/running lights
4 black 10 battery charge (+)
5 red 14 left turn/stop
6 brown 14 right turn/stop
7 yellow 14 auxiliary/back up
NOTE: #7 is the center terminal and currently is most commonly used for backup lights.

Wiring Diagram for Typical Brake Control Installationbrake conroller.jpg

Four wire connections are required for installation of a brake controller.

  1. Trailer feed (usually blue): This wire connects the brake controller to the 6-way or 7-way trailer connector at the back of the tow vehicle. Some vehicles with factory tow packages already have a wire for this connection, and it would run from under the dash to the rear of the vehicle. Otherwise, you will need to run a wire from the brake connector location, underneath the vehicle, through the firewall, then to the desired brake control mounting location. Most vehicles already have a pre-existing hole or grommet to get through the firewall. However, if your vehicle doesn’t have a pre-existing hole, you will have to drill.
  2. Ground (usually white): This wire is connected from the brake controller to any reliable ground location.
  3. Brake switch (usually red): This wire can be found at the switch at the top of the brake pedal. Usually more than 1 wire runs out from the switch, and you will have to test them with a circuit tester to determine which wire has power when the brake pedal is depressed. Use a quick-splice connector to tap into this wire.
  4. Battery power (usually black): This wire connects power from your tow vehicle’s battery to the brake controller. Some vehicles with factory tow packages already have this wire run from under the dash to the battery with some kind of circuit protection. Otherwise, a wire must be run through the firewall and connected directly to the battery with an in-line circuit breaker.

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