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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
Our Price: $6.65
You Save: 63%
Trailer Wiring
Shipping Weight: 0.2 lbs
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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. Great 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 1-800-940-8924 for expert service.
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  • Reviews (554)
  • Q & A (0)
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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 Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (553 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.


Product so far has worked great for a pinched/cut OEM 7pin cord. It isnt weatherproof like an OEM connector to the cord-as well as the female end of the connector but then its just the connector so totally sealed is not the design for this. It works fine & currently has saved me from having to purchase a connector & wire cord as 1 piece & some shennagins with installing that set up.


It's a good plug and easy to wire with internal screw terminals. However, there's no real weatherproof seal to the cable or bundled wiring that you're inserting into the plug. It's going to get wet inside the plug, leading to possible short circuits unless you seal the cable entry well with RTV or dry it out regularly and/or take it apart once and a while to make sure there's no corrosion on the terminals. A lot of plugs are like this which is why the manufacturers use a molded plug/cable assembly for the trailer connector cable.


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.


Great jack for the money! Much better than the jacks that come on most utility trailers that wear out quickly.


Showed up in acceptable condition, refused order. Parts missing. Have not heard back yet for replacement of order

Etrailer Expert

Katrina D.


That is not good! I have sent your information over to our customer service department for them to get you your missing parts.


This was a great deal. I was switching from and old style 6 pin. What I really like was the size of the wire clamps and screws. Because of this I was able to fit 10 gauge wires in the 12V +-locations for better/ faster battery charging in my camper while driving.


Excellent place to purchase quality par ts.

by: 05/18/2023

Decided to install this myself after getting quotes for $1100.00.
Now I know why they charge so much. But with the help of etrailer's
video's the install went as planned and works great.
Thanks etrailer.


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.


Quick delivery...I have used this product before from great.


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.....


all good, easy to install and working as it should.


Good quality, quick delivery, everything fit as expected. Thank you again, etrailer!


Easy to order, and was delivered when they stated it would be here.


Seems as expected


This was an exact replacement for the one that had broken. Its even labeled inside for what color wires attach to what terminal. Can not go wrong here.



Still working out great after 1 year. No issues. Stock OEM replacement.


This was the last part I needed to order to carry a spare tire on my RV. Sherry S. was a GREAT help ensuring I had all the right part for my Road Master spare tire carrier - and didn't order more than I needed. Lots of helpful information on their web-sites and the videos were also very helpful. Will definitely purchase from Sherry and etrailer again.


easy installation


Exact product that I was expecting. Quality trailer connector.


I was hoping that these connectors would be better than they are. They do work. I would consider them a two trip connector; the first trip from one state to another, the second trip watching the sold trailer being pulled off by the new owner.

Sometimes you really do get what you pay for.


My trailer connector got to me sooner that promised . It was exactly the right one, which I was unable to find in my local retail stores.


Finally, a company that actually knows how to package a product! Quality packing materials, Thick, sturdy cartons, plenty of paper to prevent the items from banging around inside and destroying each other. Quick shipping, good communication and overall fair prices. Will be back for more!


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.

Etrailer Expert

Jon G.


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.


Excellent customer service, reasonable pricing, timely shipping and delivery,, and quality parts for the past 10 years of doing business with Keep up the good work.


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

Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

  • Voltage Drops at Clearance Lights on Aluminum Cattle Trailer with 25 Clearance Lights
    You have a lot of lights on your trailer drawing power from the running light circuit. As long as the lights are lighting up properly there is no reason worry and you can switch out LED lights a little at a time. If the lights are dim then the combined power draw is likely too much for the tow package wiring on the tow vehicle to handle. Usually when this is the problem it will blow a fuse on the tow vehicle. You can check the wiring for each of the lights to make sure that they are all...
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  • Wiring Connections When Installing Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector
    When installing the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector # PK12706 it is most important to go off the function of the wire rather than the colors of the wiring. I have included an image below which shows the function for each terminal.
    view full answer...
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  • How to Open Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector PK12706
    On the top of the trailer side 7-Way connector # PK12706 there is a small set screw. Use a small flat blade screwdriver to loosen the set screw. It does not have to come all the way out. Once the set screw is loose you can use the screwdriver to push the face of the connector out from the back. You would then run the wiring through the back, make the connections to the terminals on the face part, then push the whole assembly back into the body of the connector. Tighten the set screw and...
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  • Can Reverse Light Circuit of 7-Way be Used for Reverse Lights and Reverse Lockout
    Yes, the reverse light circuit of a 7-way like the # PK12706 was designed for both a reverse lock out solenoid or a reverse light on the trailer so either way it would work great for you.
    view full answer...
  • 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....
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  • When Does Blue and Black Wire of 7-Way Circuit have Power
    The black wire of a 7-way is typically the 12 volt power accessory circuit. This would be hot all the time but on some vehicles it may only come on when the key is in the on position. The blue wire would only see power if a brake controller was putting power on the circuit.
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  • 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...
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  • 7-Way to 4-Way Adapter Recommendation for 2014 Nissan Pathfinder Towing Small Utility Trailer
    I checked out the Carry-On Trailers 5ft. x 8ft. Trailer with Rear Gate/Ramp 1259048 from Northern Tools on their site and the trailer connector the trailer has is a standard 4-way connector. Since your 2014 Nissan Pathfinder has a 7-way on it the correct adapter is the part # PK12706. Using this adapter will be all you need to operate the trailer's lights.
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  • How To Install the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector
    I am not exactly sure what you are asking but when installing the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector part # PK12706 on your trailer you will need to test the wires for function rather than color match. I know it will be easier to just match colors but this is not the correct method as trailer manufacturers can use whichever color wire they have on hand and there is no telling if the wires were replaced at one point in time. Therefore, I recommend that you apply a 12...
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  • How To Install Pollak 7-way Trailer Connector PK12706 On Trailer Where Colors Do Not Match
    The yellow wire you mentioned should be for the reverse lights and it which case it would need to get installed in the middle pin. Now the color of the wires is not standardized between trailer and vehicle manufacturers so you will need to reinstall the wires in the same location as they came out of the other connector. If you already have the connector apart and do not remember where they were installed in the other connector then you will need to use a 12v battery to power each wire...
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    Image 1 for
  • 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...
    Image 1 for
  • 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...
  • Troubleshooting Trailer Turn Signal/Stop Lights Not Working After 7-Way Install
    The problem is the stop/turn signal circuit of the 7-way. The running lights for the taillights are their own separate circuit and there should be a second wire run to the taillights that carries the stop/turn circuit. I attached a diagram that shows how a 7-way is typically wired. If your current 7-way is wired up correctly the next thing to check is the grounds of the taillights as it sounds like they may not be sufficient to power the increased amperage draw of the stop/turn circuit....
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    Image 1 for
  • 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...
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    Image 1 for
  • Which Wire on Trailer's 7-Way Wiring is Brake Output
    It is probably the black wire that is the brake wire on your trailer's 7-way wiring and the red wire is the 12 volt accessory circuit. I would recommend verifying this by tracing where the wire goes as not everyone follows wiring color standards.
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  • Wire Color Guide Recommendation for Installing 7-Way Kit part # PK12706
    There are a couple ways that 7-way wiring colors can appear so it does make it a little difficult to say for certain what you'd have to use. But I attached a couple pictures that show how the two most popular color configurations would wire to the # PK12706. The middle set of pictures and the left set are the two most common ones for you to use as a guide.
    view full answer...
    Image 1 for
  • Instructions to Wire Dump Trailer with Electric Brakes
    I would use the RV-Style Trailer Connector, # PK12706, which you reference, and install the wires in the proper locations in the 7-Way connector. Our wiring page, see link, has photos that detail the wiring configuration of the 7-Way RV trailer connector for you to check out. You will need to test the functions of each wire using a 12 volt battery to determine their function. Once you know the function, you can use our trailer connector wiring diagram to make the proper connections.
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  • Troubleshooting Brake Controller Installation On 2006 Chevrolet Silverado 1500
    It sounds like you did not have a factory 7-way trailer connector on your 2006 Silverado. I have attached a link to a helpful article that explains how a brake controller is installed on a Silverado like yours. In step 2 under section F it explains how the wiring including the Blue wire is connected and which fuses and fuse box posts are used. It sounds like a step may have been missed when the brake controller wiring was completed. Check out the article and if you complete all of the...
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  • Interior Dome Light on Discovery Trailer Only Works with Brake Pedal on Ford Expedition
    I can certainly say that is a unique issue that I have not heard before. However, I suspect the wiring on the trailer is what is causing the odd lighting funcion. The trailer may be wired correctly according to the manufacturer but that does not necessarily mean it matches what is on the tow vehicle. Generally speaking, the interior dome light on a cargo trailer will be ran to a separate battery on the trailer. If the trailer does not have a seperate battery then it will be ran to the 12...
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  • How To Wire a Trailer Connector With Uncommon Wire Colors
    I would love to help but a common misconception with wiring a trailer is that you can just simply match colors and that is not the case. In order to install a new trailer connector like part # PK12706 on your trailer you will need to test each circuit to see which wire has which function which can be done by applying 12 volt power to each wire and then checking to see which circuit is activated by that wire. This is the only tried and true method for trailer wiring. I have attached our...
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  • 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...
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  • 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...
  • Troubleshooting Trailer Running Light Circuit that Comes on When Trailer Wiring is Plugged In
    You have a short between the 12 volt running light circuit of your trailer's wiring and the running light circuit. This is causing the voltage from the 12 volt circuit to backfeed onto both the trailer and truck. You need to check out the connector of the trailer on the front and back looking for any exposed wire or corrosion and fix as needed.
    view full answer...
    Image 1 for
  • 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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