1. Wiring
  2. Pollak
  3. Trailer Connectors
  4. Vehicle End Connector
  5. 4 Round
  6. Plug Only
Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End

Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End

Item # PK11404
lowest price pledge
Retail:$20.87
Our Price: $9.10
You Save: 56%
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.34 lbs
Quantity: 
In Stock
PK11404 - Plug Only Pollak Wiring
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Establish a secure connection between your trailer and your towing vehicle with this 4-pole, round pin, wire-insertion style socket. Zinc die-cast socket has concealed terminals to provide easy assembly and durability . Lowest Prices for the best wiring from Pollak. Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End part number PK11404 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (60)
  • Q & A (27)
  • Photos
  • Why etrailer?

Pollak Wiring - PK11404

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Round
  • Plug Only
  • Pollak

Establish a secure connection between your trailer and your towing vehicle with this 4-pole, round pin, wire-insertion style socket. Zinc die-cast socket has concealed terminals to provide easy assembly and durability .


Features:

  • Heavy-duty, metal, 4-pole socket connects trailer to towing vehicle
  • Round brass pins
    • Minimum voltage drop is ensured
    • Dielectric (non-conducting) grease coating
      • Protects against corrosion and resistance
    • Wire gauges up to #12 gauge wire accepted
  • Concealed terminals for durability
    • Provide easy assembly
  • Spring-loaded lid
    • Keeps dust and moisture out of interior
  • 2-Hole mounting style

Specs:

  • Fits Pollak Heavy-Duty, 4-Pole Round Pin Connector (PK11402)
  • Does not fit Pollak Heavy-Duty, 4-Pole, Round Pin (PK11409)
  • Mounting dimensions: 1-3/8" diameter hole
  • Mounting screw holes: 1/4"
  • Volt rating: 12 volts - 24 volts
  • Current rating: 35 amps
  • Wiring configuration:
    • Color - circuit:
      • White - Ground Return
      • Green - Right Turn and Brake Lights
      • Yellow/Red - Left Turn and Brake Lights
      • Brown - Tail Lights
  • 1-Year limited warranty


11-404 Pollak Heavy-Duty, 4-Way, Round Pin Trailer Wiring Socket, Concealed Terminals - Metal - Vehicle End






Customer Reviews

Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End - PK11404

Average Customer Rating:  4.9 out of 5 stars   (60 Customer Reviews)

Establish a secure connection between your trailer and your towing vehicle with this 4-pole, round pin, wire-insertion style socket. Zinc die-cast socket has concealed terminals to provide easy assembly and durability .

- PK11404
by:

Heavy duty 883318



- PK11404
by: 08/13/2020

Just what I needed! 861486



- PK11404
by: 08/08/2020

A nice part worked well. 858353



- PK11404
by:

Looks to be a well-made product heavy duty it was just too wide for my application. 683863



- PK11404
by:

Just what I needed. ETRAILER Rocks !!!!! 662162



- PK11404
by:

Everything was just as I expected an of excellent quality 649507



- PK11404
by:

Great Experience.. Will definitely be purchase from again 641568



- PK11404
by:

Exelent work Thanks 633502



- PK11404
by:

It worked perfectly. Exactly what I ne eded. 592961



- PK11404
by:

Smooth deal. Great Customer Support! 588085



- PK11404
by:

Great Products! Fit right into the holes on my wrecker. Look just like OEM Equipment. Thanks! 574068



- PK11404
by:

Just what I hoped for! 558886



- PK11404
by:

Great product, ontime and in new condition as I expected. I will be a repeat customer! 508808



- PK11404
by:

Needed to complete the connection, does require some drilling of holes for mounting screws, but makes a solid connection. Spring loaded cover also locks the connection together. Is easy to use in all weather conditions, and with metal construction is heavy duty and long lasting 468099



- PK11404
by:

found it easily and looks great 467407



- PK11404
by:

Great product. 461663



- PK11404
by:

Works great! 458431



- PK11404
by:

Just what I wanted! A HEAVY DUTY 4 pin connector for my tow vehicle. No issues or problems. 454551



- PK11404
by:

Just what I needed Excellent product 447974



- PK11404
by:

Very solid piece of hardware not like some I have ordered before. Quality product. 434645



- PK11404
by:

It was great. We got it in barely no time and it was installed and has been working great for the past 2 weeks. Highly recommended. 390672



- PK11404
by:

Worked great 386008



- PK11404
by:

This replaces a failed one that was made of rubber and did not hold up to repeated plugging and unplugging. 384368


Comments
It has worked very well. We sold the RV and now have the BlueOx tow bar and brake system for sale.
Jack - 05/24/2018

38887

- PK11404
by:

Always a good product at Etrailer.com and informative write up and videos 362700



- PK11404
by:

great 340294


25
60
Show More Reviews

Ask the Experts about this Pollak Wiring

  • Pin Designation on 4-Way Round Socket Vehicle End
    The Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End # PK11404 will have the wires labeled in the following manner: White - Ground Green - Right Turn and Brake Lights Yellow/Red - Left Turn and Brake Lights Brown - Tail Lights I've attached a video to help with this pin out. If you are looking at the 4 pins. The bottom left is ground, the bottom right is running/tail lights, the top left is left turn and brakes and the top right is right turn...
    view full answer...
  • No Drill Mounting Bracket for Installation of a 6-Way Connector # PK11404 on a 2009 Toyota Tacoma
    Yes, we have a bracket for mounting the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Connector, item # PK11404. The Pollak Connector Bracket for 4-, 5- and 6-Pole Trailer Connector Sockets, item # PK11627, is designed to be attached in several ways. If you like, you can attach this bracket by drilling two holes and screwing the bracket to any location you like. If you do not want to drill, there are two other mounting methods. One is to use the Plate that sticks out to the side of the...
    view full answer...
  • Female Side Of 4-Pin Round
    We have the Pollak Heavy-Duty part # PK11404 which is considered the female plug that traditionally goes on the vehicle side but could be used on the trailer side. The trailer side male end is part # PK11409. Please let me know if this is not what you are talking about and I can help further.
    view full answer...
  • Compatible 4-Way Round Trailer Connector for Hopkins Flex-Coil Trailer Connector Adapter, # HM47043
    No, you will want to use the Hopkins Endurance Flex-Coil Trailer Connector Adapter, # HM47043, with 4-Way # PK11410. It is not compatible with # PK11404. Regarding the wiring configuration there is really no standard way of wiring a 4-Way round connector. But if you are looking at the front of connector PK11410 the bottom left is ground, top left is left turn/brake lights, top right for right turn/brake lights, and bottom right is running lights like in the video I have linked.
    view full answer...
  • Is Pollak 4-Pole Round Trailer Wiring Socket # PK11404 Compatible with Coiled Extension # HM47045
    Yes, the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket, # PK11404, and the Hopkins Heavy-Duty Trailer Coiled Extension, # HM47045, are compatible parts. You can see a typical wiring description on the product page for the PK11404, under specs. White would be ground return, green is right turn and brake lights, yellow/red is left turn and brake lights, and brown is taillights. Essentially, there is no standard or agreed upon diagram of which function should go with which...
    view full answer...
  • How to Wire Up a Tow Vehicle that has a Separate 6-Way to Tow a Vehicle with a 4-Way Flat
    The easiest way to do what you need is to convert the signal on your RV's connector to a combined circuit and then install a 4-way on your RV like part # PK11404 in place of the 6-way. For that you would want to start with a signal converter like part # RM-732. You will need to wire up the RV trailer wiring just like the label of the converter recommends. You'll notice that the running lights aren't mentioned on the label, that's because it bypasses the converter and runs straight to...
    view full answer...
  • How Should 4-Way Round Vehicle End PK11404 Be Wired
    If you are towing a vehicle with a motor home the 4-way round connections inside the vehicle end are usually as follows: Top left: Yellow wire, Left turn and brake function. Bottom left: White wire, ground wire. Top right: Green wire, right turn and brake function. Bottom right: Brown wire, tail light function. There is not an industry standard wiring diagram for the 4-Way Round vehicle end, part # PK11404, so you may need to use a circuit tester, part # 40376 if needed, to...
    view full answer...
  • Which 4-Way Round Trailer Side Connector Fits Pollak Heavy-Duty, 4-Pole, Round Pin Socket # PK11404
    The 4-Way rounds have 2 different sizes. The connector that is compatible with # PK11404 is # PK11402. What you can do is either replace the 4-Way flat on the trailer side with this connector or you can replace the 4-Way round on the adapter you have with # PK11402.
    view full answer...
  • Width Between Mounting Holes and Total Width of Pollak Heavy-Duty, Trailer Wiring Socket, # PK11404
    I spoke with my contact at Pollak. He stated the center to center distance between the mounting holes on the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket, # PK11404, is 2-7/8 inches. The total width is 3-3/8 inches.
    view full answer...
  • Adapter to Connect 7-Way Vehicle End to 4-Pole round Trailer Connector on 2002 Mercury Mountaineer
    There is not a plug and play adapter to go from a vehicle end 7-Way connector to a 4-Pole round connector. One can be made to work with your setup using the following parts. Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End, item # PK12706 Bonded 4 Wire - per foot, item # 16-4B-1 Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket - Metal - Vehicle End, item # PK11404 If you do not wish to build an adapter for your setup you can change out the trailer...
    view full answer...
  • Distance Between Mounting Holes on the Pollak 4-Way Round Connector
    I grabbed a Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket, # PK11404, from our warehouse to measure and found the distance between the mounting holes on center is 1-3/4 inches. If you check out the picture I attached you will see that you would have to come up with a shackle type adapter to allow this connector to be used on your base plate.
    view full answer...
  • Is the 4-way flat to 4-way Round # 47465 Compatible with with 4-Pole # PK11404 and # PK11410
    I went and pulled the Adapter part # 47465, Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket # PK11404 and Pollak Heavy-Duty, 4-Pole, Round Pin Socket # PK11410 to see if they were all compatible and I found that they were. The round 4-way of the # 47465 is compatible with both the # PK11404 and the # PK11410. Check out the video I attached where I show this.
    view full answer...
  • How to Wire Nissan Tow Car to Winnebago Motorhome with 4 Pin Round Connector
    Wire colors on motor homes and vehicles are not standard and vary, even between models produced in the same model year. Because this is the case you will need to use a circuit tester, item # 40376 if needed, to test the existing wires on your motor home and vehicle to determine the correct wires to splice your tow wiring to by function. Use the circuit tester and have someone in the vehicle activate each function. Once each function is located on the car and motor home label each one and...
    view full answer...
  • What Style 4-Way Round Socket Does the Custer Trailer Connector Adapter # ADP001 Fit
    The Custer Trailer Connector Adapter # ADP001 that you referenced is designed to fit 4-way round receptacles like the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket # PK11404.
    view full answer...
  • What is the Center Bracket for In Roadmaster Base Plate Kit # 1425-1, 2004 Jeep Grand Cherokee
    You are correct. The center bracket with the round hole in Roadmaster XL Base Plate Kit, # 1425-1, is for the wiring harness to mount to. A connector like # RM-910030-1 can be mounted in that bracket, or Pollack connector, # PK11404.
    view full answer...
  • Testing 4-Pole Vehicle Socket to Confirm Wiring Configuration
    On the Pollak Heavy-Duty 4-Pole Round Pin Trailer Wiring Connector # PK11402 the ground pole (shown in the linked photo) is at lower-left. It is certainly possible that your vehicle socket, one like # PK11404, was wired with ground on a different pin. You will need to test the vehicle wiring to confirm so that you can wire connector # PK11402 to match. This is easy to do; all you need is some wire like # 10-1-1 to connect the battery to the contacts on the vehicle's socket. This will show...
    view full answer...
  • How to Install a 7-way and 4-way # HM40975 on a Vehicle with a 4-Way Round
    We have what you need. It sounds like you have a 4-way round on your trailers like the part # PK11404 already installed on your trailer. So what you will need to do is first cut the 4-way off of your tow vehicles and then wire the wires that previously ran to the 4-way to the Harness part # PK11998. You will want to run the running light circuit to the brown wire, the ground to the white wire, the left turn/stop circuit to the red wire and the right stop/turn to the green wire. The rest...
    view full answer...
  • Recommended Adapter for 4-Way Round Trailer Connector on Motorhome
    The Custer Trailer Connector Adapter - 4-Way Round to 4-Way Flat # ADP001 will work for your 1995 motorhome with 4-Way round. The 4-Way round trailer wiring connections carry the same functions as the 4-Way flat trailer wiring connections they are just more heavy-duty, so this adapter will allow you to capture the functions you need for your trailer. The pins will fit the dimensions you gave as that is the traditional application for a trailer connector like # PK11404.
    view full answer...
  • Trailer Wiring Socket Recommendation for a 4-Pole Round Trailer Connector
    For a 4-pole round trailer connector and socket, I would recommend looking at the Pollack Heavy-Duty 4-Pole Round Trailer Connector, # PK11409, and the Pollack Heavy-Duty 4-Pole Round Trailer Socket, # PK11410. The connector and socket have a chrome-plated finish for corrosion resistance. I have attached a photo showing the typical wiring set up for 4-pole round trailer connectors. This should help when you are wiring the connectors to your trailer and vehicle.
    view full answer...
  • What Type of Socket Does 4-Way Round Side of HM47043 Attach to
    The 4-way round side of the Hopkins Endurance Flex-Coil Trailer Connector Adapter part # HM47043 that you referenced would attach to a 4-way round like the part # PK11404 and would work well.
    view full answer...
  • Availability of a Round Vehicle Trailer Connector for a 2011 Subaru Outback
    Yes, we have round connectors that can be spliced onto the Curt T-Connector Wiring Harness, # C56040, for your 2011 Subaru Outback Wagon. If your trailer has a 4-Way round connector you would need the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket, item # PK11404. If your trailer has a 6-Way round connector you will need the Pollak 6-Pole, Round Pin, Trailer Wiring Socket, item # PK11609. If your trailer has a 7-Way round connector you will need the Pollak 7-Pole, RV...
    view full answer...
  • Trailer Wiring Adapters Available for 7-Pin Flat to 4-Pin Round Connectors
    I have some wiring adapter options for you, but if your vehicle has a 4-Pin round connector, like # PK11404, we only offer adapters to connect to 4-Way flat trailer connectors and tow bar wiring extensions like # HM47043 that you referenced. If you're looking for a wiring adapter to allow you to connect a trailer with a 4-Way flat connector, like # 18004, to your vehicle's end 7-Way blade-style socket, like # PK11893 we have an adapter that will work great. For this set-up, you can...
    view full answer...
  • Availability of 4-Round Trailer and Vehicle Connectors that Will Accept 12 Gauge Wire
    A 3-flat is indeed a tough plug to find. It might be best to change to a 4-Way of some type. We have the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Connector, # PK11402, that will accept up to 12 gauge wire. This is a trailer end plug. The vehicle side is the Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Socket, # PK11404. It, too, will accept 12 gauge wire. I have included an FAQ article on trailer wiring below.
    view full answer...
  • Need to Adapt 6-Way Connector on Motor Home to 4-Pole Round Tow Bar Cable
    I would recommend installing a 4-pole round socket, part # PK11404 on the rear of the motor home, rather than trying to construct an adapter. The socket would need to be tapped into the wires feeding your 6-way. We offer 4 conductor wire, part # 16-4B-1 that is sold by the foot, you would probably want at least two feet. The wire is conveniently color coded, and would attach to the 4-pole socket as follows: Attach the brown wire to the # 2 terminal. Terminal # 1 would be grounded to...
    view full answer...
  • Parts to Equip 2007 Honda Pilot and 2004 Ford F-350 for Towing ATV Trailer
    We can help you get your two vehicles, the 2007 Honda Pilot EX 4x4, and the 2004 Ford F-350 diesel, ready with the items needed for towing your Aluma ATV trailer. Your Aluma 7710 trailer itself weighs in at 565-lbs so with an ATV loaded your total tow load will be in the range of 1300 to 1500-lbs. Both vehicles have more than enough towing capacity. Let's go one at a time. For the 2007 Honda Pilot EX 4x4 I recommend the 2-inch hitch # 75599. For wiring, since the trailer has no brakes...
    view full answer...
  • Componenets Needed to Wire 7-Way Blade and a 4-Pole Round Trailer Connector
    I would recommend the Pollak 7- and 4-Pole Trailer Connector Socket, part # HM40975. This connector would allow you to use both the 7-way connector as well as the more common 4-pole flat connector. On the other end of the bumper, you could use the Pollak Heavy-Duty 4-Pole Round Pin Trailer Wiring Socket, part # PK11404. This connector could be tapped into the wiring for the 7-way connector. This set-up would allow you to tow many different trailers, without the need for an adapter.
    view full answer...
  • How to Make 4-Way Round Harness that is 12 Feet in Length
    We have 4-way bonded wire sold by the foot with part # 16-4B-1 which you could order in a quantity of 12 feet to get the length you are wanting. Then for 4-way plugs we have the male # PK11402 and female # PK11404.
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Sarah L
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Written by:
Tyler C
Video by:
Joshua S
Installed by:
Cole B
Video Edited:
Zach D

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.