7 Way RV Connector

Pictured below is the Pollock 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 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.

Click for 6 way connector wiring.

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.

Brake control connector wiring harness
color code for factory supplied harness

Cheverolet/GMC

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.

Brake control connector wiring harness
color code for factory supplied harness

Dodge/Chrysler

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.

Brake control connector wiring harness
color code for factory supplied harness

Ford

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

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7 Way RV Connector

GM trailer wiring code

Dodge tow vehicles with the Factory Tow Package Brake Connector

Ford tow vehicles with the Factory Tow Package Brake Connector