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Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End

Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End

Item # PK12706
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This standard, RV-style, 7-pole connector provides a secure connection between your trailer and tow vehicle. Black plastic construction prevents rusting, enhances appearance and makes plug removal a snap. Lowest Prices for the best trailer wiring from Pollak. Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End part number PK12706 can be ordered online at or call 1-833-496-1390 for expert service.
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  • Reviews (477)
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Pollak Trailer Wiring - PK12706

  • Trailer Connectors
  • Trailer End Connector
  • 7 Round - Blade
  • Plug Only
  • Pollak

This standard, RV-style, 7-pole connector provides a secure connection between your trailer and tow vehicle. Black plastic construction prevents rusting, enhances appearance and makes plug removal a snap.


  • Standard, 7-pole plug connects trailer to socket on tow vehicle
  • Black plastic construction
    • Eliminates rusting
    • Enhances appearance
    • Prevents difficulty in plug removal
  • Non-corroding, shock-resistant interior design
    • Terminal reinforcer dams eliminate shorting out
      • Prevent contact from spreading
    • Center pin accepts up to 8-gauge wire
    • Vinyl inserts keep out dirt and moisture
  • Dual grips
    • Promote easy removal of plug from socket
  • Safety latch
    • Ensures connector is plugged into socket
  • Color-coded to RVI standards


  • Wire gauges:
    • Red, brown, green, and yellow: 14 gauge
    • Blue: 12 gauge
    • White and black: 10 gauge
  • Wiring configuration:
    • Blue: electric brake
    • Green: tail lights
    • Red: left turn signal and brakes
    • Brown: right turn signal and brakes
    • Yellow: auxiliary and reverse lights
    • Black: battery
    • White: ground wire
  • 1-Year warranty

7-Way Trailer Diagram

12-706 Pollak Black Plastic, 7-Way, RV-Style Trailer Connector - Trailer End
Replaces 30305; 118021

Customer Reviews

Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End - PK12706

Average Customer Rating:  4.8 out of 5 stars   (477 Customer Reviews)

This standard, RV-style, 7-pole connector provides a secure connection between your trailer and tow vehicle. Black plastic construction prevents rusting, enhances appearance and makes plug removal a snap.


This is a great product and works perfectly for my use. Installation was easy especially with the plug and play harness. I wish I lived on the lake, but now I have much more confidence towing to it regularly.


Great replacement for my old style trialer connector that was causing intermittent signal issues. Good quality.


These are the easiest plugs to install in our fleet if trailers.


Using this product to replace inputs from a straight-4 hookup plus add'l wires from a supplemental light system for my truck. Works exactly as advertised; saves me a lot of hassle. Installer must have some rudimentary electrical-connection knowledge.

You must also know which of the seven contacts does what for your vehicle to install this correctly; should be in your car/truck's manual.

Four instead of 5 stars just because the entrance/exit hole for wires needs supplementation to make it water-tight.

Product is easily worth the money and functions exactly as one would expect.


These are high quality plugs. We order them to switch out cheap ones that ship along with our wiring harnesses.


After a year of occasional use on our camper, this connector is still working great! Also worth mentioning, the customer service I get from etrailer is excellent! I had a component on another purchase that I needed to return, and Odelia was very helpful!


Perfect replacement for the one which came loose and surfed on the road for several miles on the interstate. Easy to wire and install.


Parts work gread! I use this one with a receptacle on my Kubota tractor for powering my utility trailer electric brakes and for an auxiliary power outlet for my 16 gallon electric sprayer

Continues to work well...both for the trailer and the sprayer rig.....
Clifton - 08/05/2022


Great place to find parts at reasonable prices for the value, great quality, easy to use website and delivered on time. Highly recommend!


Good replacement


Still working great! I haven't dragged this one down the road yet.


This is my third order which speaks for itself. Best Customer Support, order handling, shipping expediency, packaging , price and product quality. Lori B took my order over the phone. She was very courteous, knowledgeable and strongly represents the Companies Customer
Service Policy. Looking forward to Order #4...Wentzville, Mo., (The Show Me State) and they sure showed me.

Your wasting your time looking for a better company to do biz with, etrailer has it all under one roof, quality merchandise, bend over backward staff going the extra mile, bodacious customer service and Im sure I left something out here, trust me, try etrailer youll be blown away. They are setting the example in the industry.
Big B - 10/28/2021


been using your company & these trailer plugs for years. all is fine


Great product. Shipping was fast. They kept me informed when the shipment was going to be delivered.


I have this same plug (PK 12706) on the Boat Trailer and it works perfect, and never disconnects or shorts. Now I'm putting this same plug on the Snowmobile Trailer. I'll let you know if I have any problems. Anything to do with trailer issues I always contact eTrailer Company first.


Great job getting parts out fast. All the way to Washington state in just a few days. I feel the customer service department went all out to make it happen. One call and they were on it. Thanks!!


do not follow the labeling on the back of the plug the colors do not match. had to do a google image search for a pin out of a trailer plug.

Thank you for your review! You do bring up a good point. While the wiring setup displayed on the connector is the most common wire colors, it is important to note that some instances can vary so you want to connect the wires by function rather than colors. The function diagram is listed in the photos above as well as this attached helpful article for you to check out.
-- Etrailer Expert Jon G - 03/26/2021


Reasonable price, works great.


Just exzactly what I needed


The quality is good with and I am happy with that. Just do not follow the wiring labels on it. Half the listed colors are incorrect. I made the mistake and had to rewire after going to etrailer website instructions and getting the correct wire locations. Works good now though. Other than that very happy with it.

The colors on this plug are for RV Industry Standard wiring. Traditional Wiring colors are different. That said, the individual terminals are in the same order as far as which terminal goes to tail lights, which terminal goes to right turn signal, etc., regardless of which wiring colors are on your existing harness. Now if only the person who converted the wiring on my sisters horse trailer to 6 blade 7 terminal had followed the color codes of either..... That however, will be corrected this Friday!!!!
-- comment by: Bill J - 08/05/2014


I wanted a plugin connector wired only to 12v 30A pins to connect my Smittybilt air compressor during off road trips and occasional home use without getting under the hood. This connector works perfectly.


Easy to use, works great!


Got my new/used trailer rewired and my '16 Silverado started throwing "check trailer wiring" code ! Trough much research and googling the code I found the factory used the POLLAK 7 pin receptacles . And some 7 pin plug makers were not up to OEM standards . They fit sloppy . So until my new end came I wrapped the sloppy end with electric tape for a snug fit bent tabs out slightly and greased with dielectric grease . That stopped code . When the new end arrived I changed it and seams the problem is solved .


Excellent product. Worked as expected.


No problems easy to install

Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

  • Troubleshooting Voltage Drop on Electric Brake Wire on Trailer with New Wiring
    The first step I would take is to replace the 14 gauge wire for the electric brakes with either 10 or 12 gauge wire. It is not recommended to use wire smaller than 12 gauge on electric brake and battery charge circuits on trailers. The smaller gauge wire should not cause a significant voltage drop by itself, but it could easily overheat and cause problems in the future. The next step would be to inspect your ground connections. Be sure everything is grounded to a clean, bare metal surface....
    view full answer...
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  • Troubleshooting Trailer Lights that Go Off When Headlights are On and Brake Is Applied
    It sounds like you have a ground issue. When the headlights are on and the brakes applied, the highest amperage draw is placed on the wiring system and, a faulty ground will show at this time. Make sure you have good metal to metal contact. Paint and corrosion can act as insulators, so make sure the grounds of the light assemblies are touching clean metal. I would check all of the ground connections on the trailer. First, check the ground at the trailer tongue from the trailer conenctor....
    view full answer...
  • Removing Old Plug and Installing 7-Way Trailer Connector # PK12706
    If you cannot access the pin terminals inside your 7-way trailer connector, you can simply cut the wires at the back of the plug. I would actually recommend cutting off the old plug if the plug has a lot of dirt and corrosion. Often times, dirt and corrosion can make its way into the 7-way plug and begin to corrode the wires. By cutting off the plug, you will have clean wires to attach to the new 7-way plug.
    view full answer...
  • Wiring Up a New Trailer Side 7-Way Connector on a Trailer that Used to have a 4-Way
    A wishbone harness will have 2 wires for running lights. On a trailer side 4-Way, the pin next to the ground pin is for the running lights. You can connect the 2 wires that carry the running lights together and then to the new connector. The running light wires should be the yellow/brown and green/brown. Traditionally a yellow wire only is for the left turn and brake lights. It is next to the running light pin. And the last pin, typically a green wire only, is for right turn and brake lights. But...
    view full answer...
  • How to Wire a Trailer and Vehicle Side 7-Way Trailer Connector
    You cannot go by wire color in most cases because there is no real standard. We have blue for trailer brakes, yellow for left turn/brake lights, brown for running lights, green for right turn/brakes, black for 12 volt power, white for ground, and purple for reverse or AUX power at the center. Since your lights are not working something must not be in the right spot. What you can do is touch each wire to the positive terminal of a separate 12 volt battery and see what lights up. Then you...
    view full answer...
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  • What are the Wire Designations For the Pollak 7-Pole RV-Style Trailer Connector # PK12706
    I completely understand the confusion, however the diagram that is listed on the Pollak 7-Way RV-Style Trailer Connector # PK12706 is correct. The picture on the right side is the mirror image of the picture on the left. The raised portion at 12 oclock that orients the male plug in the female socket is on the outside housing and the notch on the bottom of the inside portion is for a raised portion at 6 oclock inside the housing.
    view full answer...
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  • How Does a Pollak Black Plastic, 7-Pole, Connector # PK12706 Wire by Function to a Trailer
    Check out the picture I attached that shows where each trailer circuit gets run to on the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector # PK12706. Here is a list of the circuits and the corresponding position of the 7-way as you are facing the front of the connector that it will get run to: 1:00 running lights 3:00 left turn brake 5:00 ground 7:00 brake controller output 9:00 right turn brake 11:00 12 volt battery center: reverse lights I attached a video of this product being...
    view full answer...
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  • Troubleshooting a 5th Wheel Trailer with Strange Tail Light Behavior
    To me it sounds like the wiring of the trailer connector that is on the trailer is the problem, I have had similar bizarre behavior like that with trailers and it turned out to be that circuits were getting shorted to each other and it made the tail lights behave strangely. I would recommend that you take a look at the trailer side connector and look for corrosion and loose wiring and fix as necessary. You may also want to check to make sure that the connector has the correct pin placement...
    view full answer...
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  • Troubleshooting Trailer Brakes Not Working with a 1976 Golden Falcon Camper
    It sounds like there is an issue on the trailer brakes of your 1976 Golden Falcon camper. You may want to verify that your camper does have electric trailer brakes. It may seem silly, but just because there is a 7-way on your trailer that does not necessarily mean it has brakes. If you do find that it does have brakes, the next thing to check is the wiring of the brakes. You will want to check the back of the trailer 7-way on the brake output circuit to first check for corrosion. Next,...
    view full answer...
  • Wiring a 7-Way Trailer Connector to a 1998 Jayco Pop Up Camper
    Yes, you can use the Pollack 7-Way Trailer Connector, # PK12706, on your 1998 Jayco Pop Up Camper. The first step is to verify the functions of the wires on your camper. To verify the functions of each wire you can follow the wires along the trailer and see where they end up. You should have two different color wires going into the left and right turn signals and another color going into all of the tail lights. Those will be your turn signal and tail light circuits. The white wire is...
    view full answer...
  • Trailer Wiring Diagram for a Trailer Side 7-Way Connector
    First, you can almost never go by color as there is no real industry standard. You have to go by function when adding a new 7-Way. I have included a picture that shows the trailer side connector and how it should be wired. Ignore the colors, you will need to trace the wiring back to determine the functions. The corrosion in the bulb sockets and on the bulbs should be cleaned out if at all possible. Corrosion could lead to poor performance down the road.
    view full answer...
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  • How to Wire The Pollack 7-Pole Trailer Connector With 2 Brown and 2 White Wires
    It sounds like someone has wired your trailer with non-standard wiring colors. Your additional brown and white wire are most likely a 12 volt power lead and an auxiliary power lead. Before you wire the Pollak 7-Pole Trailer Connector, # PK12706, you should verify the function of each wire. Our video and our chart on the product page shows the standard wiring colors. To verify the functions of each wire you can follow the wires along the trailer and see where they end up or you can use...
    view full answer...
  • Problem with Snapping Female 7 Pin Trailer Connector to the Male 7 Pin Vehicle Connector
    If the cover on the vehicle side 7-Way has broken off, it will not hold the trailer end in place. Check to see if the spring that holds the lid closed is in good working order and if the cover is broken off then the mechanism that normally moves out of the way when the cover is lifted could be blocking the trailer side connector. Other times there is a lot of force required to connect the first few times if parts are new. And there is also the chance that the openings on the trailer side...
    view full answer...
  • How to Manually Operate a Slide Out for a Trailer
    There is a chance that your trailer has a manual override built into it. I would recommend you check with your manufacturer before you try the following steps. The first thing you are going to want to do is find the slide-out motor. The motor is located beneath the slide-out room. Refer to the owners manual for the exact location. Next, you will want to remove the brake assembly from the motor. Use a screwdriver to remove the screws that connect the brake assembly to the motor. Do not...
    view full answer...
  • How to Wire a 7-way Trailer End Electrical Connector on a 2008 Chevrolet Silverado Pickup
    If you are looking at the inside of the Trailer end connector where the wires are secured you will notice numbers and or colors printed next to each pole. There is a wiring diagram on our wiring page (see link below) that shows you where each wire is attached and what function is related to that circuit. Number one should be your ground wire (white), number two is the electric brake wire (blue), number three is the taillight wire (brown), number four is the 12 volt accessory wire (black),...
    view full answer...
  • Wiring an Old Trailer with a New 7-Way Connector and Figuring out the Wires
    I would start by getting a RV-Style Trailer Connector, item # PK12706, to wire your trailer. You will need this connector since your trailer has reverse lights. If your trailer has brakes you will also need a brake controller and wiring to install it in your vehicle. I would connect a wire to the tail light circuit in the 7-Way connector and check each one of the wires on the trailer independently, labeling them as you go. You will also need to make sure a there is a ground wire from the...
    view full answer...
  • Tekonsha Prodigy Reading No Trailer on a 2008 Toyota 4 Runner Using a 7 to 5 Pole Adapter
    The adapter is probably the culprit. Traditionally a 5-Pole connector uses the 5th wire for reverse lights, not a brake controller. The easiest solution would be to convert your trailer connector to a 7-Pole using something like part # PK12706. All of the adapters that we carry are built for reverse lights as the 5th pole, not brake controller output. I have added a link to a wiring help page. About half way down we have a diagram that breaks down a 7-Way pin by pin to show you what...
    view full answer...
  • Re-Wiring a 7-Way Trailer Connector Onto a 1972 Shasta Trailer
    It sounds like you will need to wire the trailer with a 7-Way connector to match the one on your 2001 Chevy Suburban. If you look at the Wiring FAQ article, linked below, about half way down the page you will see diagrams for connectors. You will need to re-wire the trailer wiring to match the one that says inside on the 7 Way Trailer Connector section. The colors on your trailer might not match up. But if you are looking at the back of a 7-Way connector, top left is tail and running lights,...
    view full answer...
  • How are the Terminals Labeled for Wiring in Pollak RV-Style Trailer End Trailer Connector # PK12706
    The terminal itself in Pollak RV-Style Trailer End Trailer Connector, # PK12706, is not red but it is labeled, 5 RED, on the inside of the connector. It would be difficult to see in the video, linked for reference, but I have taken a more detailed picture that illustrates what it will look like on the actual part. The diagram on the product page uses the most common wiring colors. Red is not usually used but on this connector, it is labeled RED, for the left turn and brake light signal....
    view full answer...
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  • Can Just Power Wire and Ground be Activated on Trailer 7-Way
    Yes, if you only needed to connect two of the pins of a 7-way it would work totally fine as long as one of the pins was the ground like you mentioned having. As long as the ground is connected you can activate all of the circuits of the 7-way or just one.
    view full answer...
  • Can 7-Way Trailer Plug be Wired with Separate Brake Light Circuit
    There isn't a standard way to wire up a 7-way like part # PK12706 with a separate stoplight, but the center pin is typically an auxiliary or reverse light circuit that you could use as the stoplight if no reverse light is needed.
    view full answer...
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  • Middle Pin Came Off From Pollak 7-Pole Trailer Connector
    I spoke with my contact at Pollak regarding your 7-Pole Trailer Connector # PK12706. He stated that If the center pin broke/came off from the connector, the entire connector should be replaced. There isn't really a way to securely re-attach the pin if it broke off from the connector.
    view full answer...
  • Installation of Pollak 7-Way Plug with 6 Colored Wires
    The Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End # PK12706 will match the colors and locations of the attached photo. I've also attached a wiring article to assist further if the colors don't match functions correctly so you can be sure to match the functions.
    view full answer...
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  • Where do the Trailer Brake Magnets Wires Install on a 7-Way Trailer Connector
    The black wire is probably your ground and you will secure it to a clean bare metal surface on the trailer frame. Your red wire is probably your power and that will go to your 7-way trailer connector, such as # PK12706, at the 5 o'clock position. I included a diagram of a 7-way trailer connector and a helpful article about wiring for you too.
    view full answer...
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