7 Way RV Connector

Pictured on the right is the Pollak 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  the back side of the connector body is labeled at each terminal. The labels are listed  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 lights not 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 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.



This chart should be used as a general guide only, you should always test before connecting your wiring.
This chart also may not be accurate for vehicles with factory installed trailer harnesses. In past 2-3 years manufacturers have begun to match the wire colors to the code for the common 7 way RV connector. More on that after the chart.

Caution if your vehicle has a diagnostic indicator that tells you when a lamp is burned out or not functioning, you may need special wiring adapters and testers. Not using these adapters may cause damage to the vehicle wiring or computer. 
function GM Ford Chrysler

left turn & brake lights yellow lt green w/orange stripe dk green
right turn & brake lights dk green orange w/blue stripe brown
tail lights brown brown black or black w/yellow stripe
back up lights lt green black w/pink stripe violet
ground
see note 1 black black or grey black

In addition to the above some cars and trucks have a separate light for the brake light, most commonly identified by amber turn lenses in the rear. Chrysler and Jeep may have the separate light and use red lenses. If you have this type of wiring a converter is required. 
brake light lt blue or pink red w/green stripe white
Note 1: We recommend attaching the trailer harness ground directly to the frame or a solidly attached sheet metal part, using a screw or bolt. The single most common cause of trailer lighting problems is a poor ground on the tow vehicle or trailer. 


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


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.

Notes about GM OEM wiring harness. Most GM vehicles except '99 & 2000 Silverados match the following.


GM trailer wiring code

white ground
yellow left/brake
green right/brake
brown tail
light green backup
blue trailer brakes
red * 12 volt +

* Pickups only: since approximately 1996 the 12 volt + wire is orange. The orange and blue wires are in a separate bundle taped to the wire harness that runs down the frame on the drivers side. A white wire may also be found in that bundle, it is a brake light wire which is not normally used for trailer wiring. 


!! WARNING !!

When using vehicle manufacturer supplied brake control connector harness, DO NOT match colors, consult the charts below. We recommend that you also use a test light or voltmeter to confirm the listed wire function.
Chevrolet/GMC brake control connector wiring harness
color code for factory supplied harness GM supplied brake control harness Tekonsha brake control wires

All electronic models function

red black +12 volt
light blue red stoplight
black white ground
dark blue blue trailer brakes
brown not used
 
NOTE: The above applies only to the GM factory supplied harness, if using Tekonsha harness #3025, the harness colors match the brake control 



Dodge tow vehicles with the Factory Tow Package Brake Connector
Dodge vehicles with this package are equipped with a 15 amp fused power line which is insufficient for 3 & 4 axle (6 or 8 brake) applications. For 3 & 4 axle (6 or 8 brake) applications a separate power wire should be installed directly from the battery positive to the brake control and should include an inline 30 amp auto reset circuit breaker.
Dodge/Chrysler brake control connector wiring harness
color code for factory supplied harness Dodge/Chrysler supplied brake control harness Tekonsha brake control wires

All electronic models function

red w/black tracer black +12 volt
white w/tan tracer red stoplight
black white ground
blue blue trailer brakes

NOTE: The above applies only to the Dodge/Chrysler factory supplied harness, if using Tekonsha harness #3020, the harness colors match the brake control 



Ford tow vehicles with the Factory Tow Package Brake Connector
Ford vehicles with this package are equipped with a 20 amp fused power line which is insufficient for 3 & 4 axle (6 or 8 brake) applications. For 3 & 4 axle (6 or 8 brake) applications a separate power wire should be installed directly from the battery positive to the brake control and should include an inline 30 amp auto reset circuit breaker.
Ford brake control connector wiring harness
color code for factory supplied harness Ford supplied brake control harness Tekonsha brake control wires

All electronic models function

pink black +12 volt
red red stoplight
white white ground
dark blue blue trailer brakes
brown not used
 
NOTE: The above applies only to the Ford factory supplied harness, if using Tekonsha harness #3035, the harness colors match the brake control 




Nissan tow vehicles with the Factory Tow Package Brake Connector
using a red/green stop light wire Nissan supplied brake control harness Tekonsha brake control wires

All electronic models function

red black +12 volt
red/green red stoplight
black white ground
brown/white blue trailer brakes
red/blue not used
 
NOTE: The above applies only to the Nissan factory supplied harness, Tekonsha does not supply a harness for this vehicle. 



Toyota tow vehicles with the Factory Tow Package Brake Connector
using a green/white stop light wire  Toyota supplied brake control harness Tekonsha brake control wires

All electronic models function

black/red black +12 volt
green/white red stoplight
brown white ground
red blue trailer brakes
green not used
 
NOTE: The above applies only to the Toyota factory supplied harness, Tekonsha does not supply a harness for this vehicle. 



Toyota tow vehicles with the Factory Tow Package Brake Connector
using a green/yellow stop light wire Toyota supplied brake control harness Tekonsha brake control wires

All electronic models function

black/red black +12 volt
green/yellow red stoplight
white/black white ground
red blue trailer brakes
green not used
 
NOTE: The above applies only to the Toyota factory supplied harness, Tekonsha does not supply a harness for this vehicle. 

 


Wiring Diagrams
7 Way Car End
7 Way Trailer End
6 Way Trailer  and Car
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