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Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End

Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End

Item # PK12-707E
Our Price: $13.83
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Trailer Wiring
Shipping Weight: 0.34 lbs
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Establish a secure connection between your towing vehicle and trailer with this 7-pole, RV blade-style socket. Black plastic socket has non-corroding, shock-resistant interior design that eliminates shorting out and is color-coded to RVI standards. Great Prices for the best trailer wiring from Pollak. Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End part number PK12-707E can be ordered online at or call 1-800-940-8924 for expert service.
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Pollak Trailer Wiring - PK12-707E

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

Establish a secure connection between your towing vehicle and trailer with this 7-pole, RV blade-style socket. Black plastic socket has non-corroding, shock-resistant interior design that eliminates shorting out and is color-coded to RVI standards.


  • Standard, 7-pole, RV blade-style socket connects tow vehicle to trailer
  • 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 pins accepts up to 8-gauge wire
    • Vinyl inserts keep out dirt and moisture
  • Spring-loaded lid with stainless steel spring and rubber gasket
    • Prevents leaks when closed
    • Drain slot has angled design for drainage
    • Secures trailer-end connector in socket
  • Safety latch
    • Ensures connector is plugged into socket
  • Color-coded to RVI standards


  • Wiring configuration:
    • Color - circuit - recommended wire gauge:
      • White - Ground - 10 gauge
      • Blue - Electric Brake - 12 gauge
      • Green - Tail, License, and Running Lights - 14 gauge
      • Black - Battery Charge - 10 gauge
      • Red - Stop and Left-Hand Turn Signal - 14 gauge
      • Brown - Stop and Right-Hand Turn Signal - 14 gauge
      • Yellow - Auxiliary Circuit - 14 gauge
  • Distance between mounting holes center to center: 2-1/4" wide x 1-1/2" tall
  • 1-Year limited warranty


12-707E Pollak Black Plastic, 7-Way, RV-Style Trailer Socket - Vehicle End

Customer Satisfaction Score:

Customer Reviews

Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End - PK12-707E

Average Customer Rating:  4.7 out of 5 stars   (279 Customer Reviews)

Establish a secure connection between your towing vehicle and trailer with this 7-pole, RV blade-style socket. Black plastic socket has non-corroding, shock-resistant interior design that eliminates shorting out and is color-coded to RVI standards.


The convert in the trailer quit, I needed 12V ASAP and didn't have the wherewithal at the time to replace it. So, I mounted the socket on a piece of wood and hooked-up just the ‘battery-in’ (black) and neutral (white) terminals. I wrapped each lead around a couple of old fence post insulators. I clipped my battery charger to those. I plugged in the trailer and turned on the charger. Now the status display in the trailer shows the batteries charging. It saved me from exposing and charging the batteries in this rotten weather.


Installed this on my 2006 Jeep Wrangler Rubicon Unlimited, which never had one nor a kit to do it. I needed trailer lights, 12v power and brake control for a Coleman camper I pull. Has worked reliably for a year now.


Just what I needed and at a great price


Works like it is supposed too.


Perfect item if you run LED lights on your trailer and your vehicle detects bulb(s) out


I ordered all the parts required to safely flat tow out 2017 Jeep Cherokee Trailhawk from The only part they didn't have was the Mopar Flat Tow Enhancement kit Jeep requires to flat tow this model.

Ordering from them was great, the website is easy to use and I was able to locate all the pieces compatible with my specific vehicle. The expert recommendations help my decision choosing the right parts. I ordered from etrailer even though I found some of the parts on other websites a little cheaper. I chose to pay a little more because of all the effort etrailer has put into installation videos and guides. I was very pleasantly surprised to learn from etrailer that they have a price match guarantee!

So my equipment consisted of the following

Mopar Flat Tow Enhancement Kit (from Jeep)

Roadmaster Battery Charge Line Kit for Towed Vehicles

Mighty Cord 7-Way RV Style Trailer Connector - Trailer End

WesBarg 7-Way, RV-Style Connector w/ 6' Long Coiled Cable Trailer End

Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

SMI Stay-IN-Play DUO Supplemental Braking System

Roadmaster Brake-Lite Relay Kit for Towed Vehicles

Blue Ox Alpha Tow Bar - Motor Home Mount - 6,500 lbs

Blue Ox Base Plate Kit - Removable Arms

Blue Ox Tow Bar Cover - Aladdin, Aventa LX, Aventa II

The installation videos are great but not all inclusive. Take the time to read the instructions that come with the parts. This is a major project, I took about 30 hrs over a full week but as you'll see in the pictures I took s few extra steps to make a cleaner look.

Some of those extra steps:

The base plate install requires the bumper be modified cutting off a flange on each side, I spray painted this to prevent corrosion.

In the install video of the baseplate on the drivers side they use an extra quick link (not included) to run the safety cable around the wiper fluid reservoir. I took the time to remove it and run the safety cable behind it.

I didn't want our nice new vehicle to look like it can be towed so I played the brake away switch and 7 way trailer plug behind the license plate, so when not being towed our vehicle looks great!

Some things to be aware of. The Brake air cylinder that mounts to the brake pedal with four bolts may need longer bolts, it did on our Jeep. Spend the money for weather tight heat shrink crimp fittings. The Hopkins wire harness was about 1.5 feet short to get to my plug location. Buy extra zip ties, electrical tape and split loom.

I recommend reading all the various installation manuals and watching all the videos because the various components integrate together and if you install one at a time you'll be doing a bunch of extra work.

The brake light relay is a real pain in the butt, not because of the hardware but because of the location of the brake light switch which is very hard to get to.

Overall I am very happy with the products and how the installation looks. We haven't towed it yet but do not expect any problems.



Still very happy with our purchase. We’ve towed over 10k miles and have had zero issues with our tow setup. I’ve shared my experience with several other RVrs and recommended your company for their needs. Thank you


7 Pin Trailler ConnectorsI ordered the Pollak Black Plastic, 7-Pole, RV-Style Trailer Socket - Vehicle End, and the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End to re-wire a Lance camper to vehicle connector.

I am going to adde the Vehicle End to the Lance camper and make a male-to-male pigtail that will plug into the vehicle and into the Lance camper.

The reason I am doing this is because I once forgot to unplug from the vehicle, and I ripped the wires out of the camper. The process to plug and unplug the wires is to back about 80% under the camper, plug in the connectors, then back the rest of the way under.

Once I rewire with the purchased connectors, I will be able to back all the way under the camper, preventing the problem of stopping at 80% both when loading and unloading.

The color coded Pollack connectors make the job of wiring easier.

I purchase all my trailer needs from eTrailer. Their service is always top notch.


Seems as expected


Ordering process was very easy and my order shipped quickly. Ordered 2 of these and when I received them they were not the same. One was nice, the other (in my mind) was cheap and flimsy. I was happy with one and disappointed with the other. One I would have given 4 stars and the other one 2 stars. I would not order again unless I knew I was getting the nicer unit in the video I watched. I would also like to comment on the video and wiring instructions. I wired it like it suggested in the video, I had no clue there were different ways to wire a RV and utility trailer. The video and product page described RV wiring. Had to take it all apart and rewire it for my utility trailer. Crazy why they are not the same. My 2012 Ram truck, 2002 Dodge, and every trailer I have owned or pulled (no RV trailers) were all wired the same. assumes you are going to be using a RV I guess.

Etrailer Expert

Laura E.


Thanks for your business and your review, Jeff. The connector is an RV blade-style trailer socket and is color-coded to RVI standards - we recommend testing for function before connecting.

Jeff L.


The cover on the cheap and flimsy version broke after about 3 uses. I would not purchase this product again unless I knew I was getting the nicer version. The nicer version is doing great, no issues with it so far. I emailed the company about the broken cover, but I did not receive a response.


Works as intended



It still does the thing

Etrailer Expert

Mike L.


@Joe Glad to hear it's doing the thang, that's important!


Had my local service station mount it to the front of my RAM 3500. Allows Electric brakes to release when pushing boat trailer into storage using front of truck. Technician added a separate switch to active backup lights.
Works great.

Jerry A.


Works as described. I’m satisfied. Thanks


works great


Exactly as described, exactly what I ne eded.


The part is heavy duty and a good replacement. The terminals are color coded, the green terminal turned out to be the brown wire. Check each terminal to verify they connected correctly. When I put the right turn Signal on, the tail lights came on and right turn signal was dim. Switched the brown wire to the green terminal and green to the brown terminal and worked correctly.

Etrailer Expert

Victoria B.


This is a common problem folks run into when working on 7-way trailer wiring. Traditional SAE wiring code uses a Green wire for the right turn and brake signal, while RV Standard wiring code uses Green for the tail and running lights. This PK12-707E connector is coded to RV Standard, while your vehicle uses Traditional SAE wiring. I have linked a help article with more information on these wiring codes for you.


Seems great. Time will tell


Harness worked well and these folks helped determine which harness would work on my Highlander. This was a great help. They replaced parts that was lost by ups due to the box was damaged. Great folks to do business with. Many thanks.


Works great! Installed on my tractor in two locations to provide power to a trailer equiped with electric brakes..



Works great! Used connector on tractor to provide electrical output for electric brakes on a large utility trailer......


I purchased this as a replacement for the exact same model. Haven't installed it yet but will before winter strikes. I live in Michigan and typically get 5 - 6 years out of them before the door spring weakens and the innards corrode. The price is right so I don't mind replacing them occasionally. I use dielectric grease inside and lots of good electrical tape & wire loom around the external wiring. That seems to prevent corrosion, at least until the spring goes.


Not as easy to wire as in the video. Need to really make the wires short so will fit back inside. The wire (DW04914) did not want to slide back through the grommet and pulled it out. Had to lubricate to get it to slide through. I decided not use this product but opted to use the 4' Pigtail Wiring Harness to repair my 7-Pole RV Ford Socket. The wiring harness code is PK11998. It plugs in directly to my OEM Ford socket.


I have ordered several items from etrailer over the years, from leaf springs, to tail lights, hitch receiver and connectors. Always happy with quality, price and speed of delivery.


I bought this and plan to hook it up to a PC power supply to make a test harness for a Habitat for Humanity trailer I am restoring for them. I had done the welding, but need to fix the wiring and put new lights on it before I put on the new deck. I don't want to tie up one of their trucks for testing it so I am making a tester (helps to be an EE). The unit was inexpensive, but appears to be very well made. I was surprised that it has a real cable strain relief feature at this price. I would recommend that once you have it installed, you fill in the end with epoxy or silicon caulking to keep water out if you mount it under the bumper..


The trailer socket received was exactly the right replacement part. It arrived very promptly and in perfect condition. It was helpful to have the tracking link so we could anticipate its arrival.
Note: be sure to mount the wires in the correct alignment, otherwise a fuse will blow or you will experience an electrical arc between the socket pin and the trailer pin. The two alignment screws on each side of the socket hold the wire harness in position; the harness can inadvertantly be installed upside down if you are not careful to keep track of the correct wire alignment.


In this case, the socket was required only because ours had literally worn out.
I only use original parts if possible for installation ease and quality expectations.
As always, etrailer had the correct part in stock and I received it in just three days.

etrailer is always my first stop when searching for hitches or supporting accessories...good service, fast delivery.


Bought this to replace a broken OEM connector. Fit perfectly and was easy to wire. Good solid Pollak product. Price was lower than any other site I visited. Will definitely shop here again.

Steve M.


Still working fine


Always a pleasure doing business with Etrailer .. great products at a great price shipping is always fast and packed well .. Thanks !




Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

  • Trailer Brakes Grab at Slow Speeds but Not High Speeds
    It looks like you have the Redarc Tow-Pro Classic Brake Controller part EBRHV2. If the brakes are only locking up at slow speeds on a particular trailer then I recommend adjusting the gain on the brake controller knob. Try using the next lowest setting to see if that fixes the issue. Please note that the gain settings needs to be adjusted for each trailer and under different weather conditions. There is not really one settings that works best on all trailers. Also, if you have manual adjust...
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  • Recommendation of Fuses and Relays for 12-Volt Power at 7-Way on 2004 Ford Expedition
    On a 2004 Ford Expedition you might want to check the 12-volt power fuse and relay in the power distribution box under the hood. There should be a 12-volt power relay at position number 5 and a 12-volt power fuse at position number 13. Also, you might check the fuse panel cover in the cab of the vehicle, under the dash, on the passengers side. It should have a 30-amp relay in position R05 and a 30-amp fuse in position 106. You will want to verify those positions of the fuses and relays...
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  • Which Way Does Starwheel of Trailer Brake Assemblies Adjust to Tighten
    If you check out the 4:39 mark of the video I attached you'll see how to adjust the brake star wheel. Pulling the star down pushes the pads out and would be the same on either side of the trailer. 106 Celsius is pretty hot. Something might be dragging so I'd recommend checking everything out.
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  • Wiring Diagram Needed for Installing a 7-Way on a 2005 Chevrolet Silverado
    When hardwiring a 7-Way to your 2005 Chevrolet Silverado, like part # PK12-707E, you will want to connect the following functions to the following pin locations: 1 o'clock - 12V Power 3 o'clock - Right Turn/Stop 5 o'clock - Brake Controller Output 7 o'clock - Ground 9 o'clock - Left Turn/Stop 11 o'clock - Tail and Running Lights Center - Reverse Lights I have attached a diagram showing these functions as well. Please note that the colors in the diagram are typical wire colors for those...
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  • Testing for 12 Volt Power for Interior Lighting in an Enclosed Trailer
    You will need to do some testing to figure out exactly where the problem is with the 12 volt power for your trailers interior lighting. The first thing I would do is check to see if the interior lights run off of the taillight circuit. Turn on the headlights on the vehicle then try the trailer interior lights, just to be sure this is not the problem. If the interior lights are not attached to the tail light circuit, use a circuit tester, # 3808 if needed, and start out by checking the...
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  • Replacement 4-Way Harness Recommendation for 2007 Chevy Colorado
    What you described is a shorted out converter box. Any time the correct voltage is running to the input side of a converter box but not making it out of the box the issue is that there is an internal short and it needs to be replaced. What you would need then is the part # 118301 which is confirmed as a fit for your truck and would work well.
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  • Recommendation to Replace Pollak # 12-705 7-Way Connector
    The door/cover for your Pollak 12-705 7-Way connector is not available from the manufacturer as a replacement part. In order to fix this issue, your best option is to simply replace the connector itself with the current version of your model with the Pollak # PK12-707E. This will provide a nice upgrade to the existing receptacle on your truck with its non-corroding, shock-resistant interior design and a spring-loaded lid that should stay in place. I have attached a short video demonstration...
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  • Recommended Replacement Part for Pollak 12-705 Trailer Wiring Socket Vehicle End
    Yes, the Pollak Black Plastic 7-Pole RV Blade-Style Trailer Socket - Vehicle End, # PK12-707E, will work to replace the Pollak wiring socket that is broken. The insert will allow you to simply disconnect the wires and reconnect them inside the outer socket. I've attached a review video of this product for you so you can see the simple installation of this replacement part.
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  • Install Video for Pollak 12-705 7-Way Trailer Wiring
    Yes, I attached an install video that shows the Pollak part # PK12-707E (same as number you mentioned) installed in a newer GMC to this page.
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  • How To Wire 7-Way Plug On Vehicle Without Brake Controller
    When wiring the 7-way receptacle on the back of the vehicle to the vehicle's battery you want to extend the black power wire to the positive side of the battery terminal via a 40 amp circuit breaker. The white wire (ground) from the 7-way receptacle should be grounded to a bare metal surface on the vehicle's frame. You still want to use the circuit breaker even if you just have lights.
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  • Location of Fuse for Trailer Power in 2012 Chevrolet Colorado
    According to page 10-46 of the online owner's manual or the 2012 Chevrolet Colorado the Trailer Auxiliary Power Maxi-Fuse (labeled item D in the linked image) is located on top of a wiring harness. You can refer to this image to help you find this fuse for trailer 12V power.
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  • 2011 Ford F-150 Does Not Recognize when a Trailer Is Connected and Trailer Brakes Do Not Work
    There could be a couple of different issues. First, make sure that the wire that leads from the trailer side 7-Way to the trailer brakes is located in the 7:00 position if looking at the face of the connector. If not, then that could be why the vehicle is not recognizing that a trailer is connected. There could also be a bad ground somewhere. I would start on the trailer and make sure that the main ground and the brake magnet grounds are attached to clean and corrosion free bare metal...
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  • Troubleshooting Factory Trailer Wiring for 2003 Ford F250
    First I recommend cleaning the connector and make sure there is no corrosion on the pins. Check the wires at the back of the plug. You may need to remove the wires from the connector as corrosion can build up in the connector. If all of the connection points are corrosion free, then begin testing the wires themselves. Since you are not receiving a signal on some of the pins I recommend tracing those wires back till you find a point where the signal is active. It may be that connection...
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  • Service Electric Brake System Light on a 2008 Chevy Silverado with Factory Brake Controller
    It sounds like you have the factory integrated brake controller on your 2008 Chevy Silverado. That error code might be popping up if there is a short. Check the truck and trailer (if connected) side trailer connectors. Make sure that they are clean and free of corrosion and moisture inside, where the wires attach, and outside on the pins. If it is happening with a trailer connected then there could be a problem with the wiring to the trailer brake magnets or the magnets are bad. I have...
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  • 7-Way to 4-Way Adapter Recommendation for Pollak 7-Way
    The Pollak 7-Way part # PK12-707E is a standard 7-way so for a 4-way adapter to fit it you'd just want the Pollak 7 Pole to 4 Way Connector Adapter # PK12716 and you'd be set.
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  • Will Pollak 7-Way Connector # PK12707 Fit the Factory 7-Way Mounting Bracket on 2003 Ford F-150
    To determine if the Pollak 7-Way Connector, part # PK12-707E, will fit your factory mounting bracket on your 2003 Ford F-150 you will want to take some measurements. On the # PK12-707E, the diameter of the socket at the widest point it just under 2 inches (1.956 inches) so it will fit into a 2 inch diameter hole. The length from the back of the mounting surface to the back end of the socket is 3-5/16 inches long. It would need to be secured using 4 screws. Side to side, the holes are...
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  • Can 10 Gauge Wire Be Used for Trailer Brakes if the Magnet Wires are a Smaller Gauge
    Yes, when it comes to wiring for electric trailer brake magnets you can attach a 10 gauge wire to the smaller brake magnet wire. Ten gauge wire is commonly used in trailer manufacturing for electric brakes even if the short wires from the magnets are smaller.
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  • 2008 Chevy Silverado 2500 factory Brake Controller Shows Service Trailer Brake System
    There could be a short somewhere that is causing that error message to show up. The most likely culprit is a dirty or corroded trailer connector. Make sure that the truck AND trailer connectors are clean and free of corrosion inside where the wires attach and on the pins. If it occurs when a trailer is connected then it could be a problem with the brake magnets or trailer wiring to the magnets. Make sure the wiring is in good shape and not pinched or frayed and that the ground wires are...
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  • Recommended Replacement 7-way Connector For Vehicle With Broken 7-way Connector
    Thanks for the picture. In the picture of the vehicle end connector it is showing that the center pin has fallen out and will need to be replaced. For a replacement you will need either the Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End # PK12-707E if your connector is hardwired with not removeable connector on the back, or the # PK11893 if your connector has a removeable US Car connector on the back. If you can tell me the Year/Make/Model of your vehicle I...
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  • Troubleshooting Malfunctioning Trailer Indicator on 2011 Ford F-150 EcoBoost
    It sounds as if you have a short on your brake output circuit. Since you have already cleaned the contacts already for possible grounding issues, you may want to check the actual pin in your 7-way. The pin may either have corrosion built up or even bent. If either of those issues are present then that will create your inconsistent readings. Another thing to check is the back of the 7-way, the wire connection point may have a short at that point. If you find that the brake pin is damaged...
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  • How Do I Clean the Terminals in a 7-Way Connector
    At this time we do not have a brush or other device specifically for cleaning the terminals in your 7-way connector. I have cleaned the connectors before and it can be quite a task with the limited space inside the connectors. You will need to be careful, especially on the vehicle side, not to short out two terminals and blow fuses or worse. Using a metal wire brush or liquid on the vehicle side would not be recommended. You could do so if you made sure all power is cut off at the connector...
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  • Running Light Circuit on Factory Trailer Connector Not Working on a 2010 Ford F-150
    Your 2010 Ford F-150 does use fuses for the tow package wiring. It could also have relays related to the tow package wiring. Use the vehicle owners manual to find the locations to check them. It does sound like a fuse or relay problem. To check a relay the easiest way is to use a known good relay in place of a potential bad one. The other possibility is that there is a break on the running light wire somewhere between the front of the truck and the connector at the back. You can use your...
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  • Trailer Brakes Dont Work w/2008 Silverado but Other Trailers Work and Other Trucks Work w/Trailer
    It sounds like there is a short somewhere because you should not be getting fluctuating voltage readings. Usually this is caused by a dirty/corroded trailer connector and/or a loose wire. Make sure the truck and trailer side connectors are clean and free of corrosion inside where the wires attach and outside on the pins. While inside the connectors you can check for loose connections. Every vehicle's tow package wiring is different and sometimes a trailer function will work with one truck...
    view full answer...
  • Replacement 7-Way Vehicle Connector for a 2022 Chevy Silverado 2500
    Thanks for the picture! Since you already have the wiring ran for the in bed 7-way harness you will only need the Pollak Replacement 7-Pole item # PK11893. This has the standard American plug that will plug directly into the connector on your Chevy Silverado's wiring if it has a connector at the end. If you do not have a plug or connector at the end of your wiring you will need the Pollak Black Plastic, 7-Pole item # PK12-707E. This is the 7-Way vehicle connector that has the terminals...
    view full answer...
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Do you have a question about this Trailer Wiring?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Victoria B
Expert Research:
Victoria B
Employee Jeff D
Installed by:
Jeff D
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Written by:
Wilson B
Employee Hannah L
Updated by:
Hannah L

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