Establish a secure connection between your trailer and tow vehicle with this metal, 4-pole plug. Round brass pins ensure minimum voltage drop, and pull grips enable easy insertion and removal. Lowest Prices for the best wiring from Pollak. Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Connector - Metal - Trailer End part number PK11402 can be ordered online at or call 800-298-8924 for expert service.
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Price: $5.93

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

Item # PK11402

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

Pollak Wiring - PK11402

Establish a secure connection between your trailer and tow vehicle with this metal, 4-pole plug. Round brass pins ensure minimum voltage drop, and pull grips enable easy insertion and removal.


  • Heavy-duty, metal, 4-pole plug connects trailer to socket on tow vehicle
    • Fits Pollack Heavy-Duty, 4-Pole Round Pin Wiring Socket (PK11404)
    • Does not fit Pollak Heavy-Duty, 4-Pole, Round Pin Socket, Concealed Terminals (PK11410)
  • Round, solid brass terminal pins
    • Minimum voltage drop is ensured
    • Dielectric (non-conducting) grease
      • Prevents corrosion and resistance
    • Solid brass terminal screws
  • Zinc, die-cast housing for durability
    • Finger grips make insertion and removal easy
  • Cable lock with plated steel retainer screw
    • Prevents chafing
    • Provides more support for cables
    • Saves installation time
  • High-impact, ABS thermoplastic interior
    • Includes extended lip for easy removal and replacement
    • Accepts up to #12 gauge wires
  • Interchangeable with competitive brands


  • 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

11-402 Pollak Heavy-Duty, 4-Way, Round Pin Trailer Wiring Connector - Metal - Trailer End

Economy - This item

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

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

37 reviews

Code: PK11402


Our Price: $5.93

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

Establish a secure connection between your trailer and tow vehicle with this metal, 4-pole plug. Round brass pins ensure minimum voltage drop, and pull grips enable easy insertion and removal.

more information →
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Video of Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Connector - Metal - Trailer End

Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.

Video Transcript for Pollak Wiring PK11402 Review

Today we'll be reviewing part number PK11402. This is the Pollak heavy duty 4 pole round pin trailer wiring connector. The 4 pole plug is going to connect the trailer to the socket on your tow vehicle. It will fit the Pollak heavy duty 4 pole round pin wiring socket, part number Pk11404. It will not fit part number Pk11410. It's going to feature round, solid brass terminal pins. It's going to ensure that minimal voltage drop is attained.

They also have a nice dielectric, non-conducting grease coating on them, that's going to help prevent corrosion and resistance. It's going to feature solid brass terminal screws. The housing is made from a zinc diecast construction for strength and durability. It's got the nice finger pulls here, for easy grip, and a nice secure grip, that way you can disconnect the plug very easily. It's going to feature a cable lock system, with a plated steel retainer screw.

It's going to prevent chaffing. It's also going to provide more support for the cables, and it saves installation time. The interior here is made from a high impact ABS thermoplastic material. It's going to include the extended look for easy removal and replacement. It will accept up to number 12 gauge wires. This is interchangeable with different brands.

It's going to give us a volt rating of 12 volts to 24 volts, with a current rating of 35 amps. When it comes to the wiring configuration, the white wires are going to be your ground, the green is going to be for right turn and brake, yellow or red is going to be for left turn and brake, and then your brown is going to be for your tail lights. In order to get your wires installed, you need to undo the screw here at the back. That's going to raise up the cable lock system, or that little steel plate that you see in there. Then, you need to undo the set screw here on the top. That's going to allow this insert to actually come out. Feed your wires through the housing, connect your wires to the back of this portion here, put it back in, reset the screw, and then tighten down the screw here at the back.

That's going to try to help limit the amount of dirt and moisture that gets to your connection points. That's going to do it for today's review of part number Pk11402. This is the Pollak heavy duty 4 pole round pin trailer wiring connector. .

Customer Reviews

Pollak Heavy-Duty, 4-Pole, Round Pin Trailer Wiring Connector - Metal - Trailer End - PK11402

Average Customer Rating:  4.8 out of 5 stars   (37 Customer Reviews)

Establish a secure connection between your trailer and tow vehicle with this metal, 4-pole plug. Round brass pins ensure minimum voltage drop, and pull grips enable easy insertion and removal.
- PK11402

by: Ddan T.08/29/2016

Actually using this to repair an Island Hopper 40lb salt water electric trolling motor. It was through searching (all over the web) the etrailer website that I found it. This is what Island Hopper uses as part of their trolling motor setup.. their wiring from the mother board to the actual trolling motor. Believe it or not. Ha Ha Thanks to etrailer, I can do my own repair now, rather than sending the unit back to the dealer for big buck repair job. The part....ordered and received.... is excellent. Heavy duty, good finish, easy to use. On the side, allow me to compliment etrailer. I have made a few purchases from them, and they are always fast, correct and efficient. And can't complain about their prices. Glad you folks are around. 288950

- PK11402

by: Jim09/02/2014

This Pollak brand works really well...fits nicely into the matching Pollak vehicle receptacle. I aways get matching Pollak connectors for this reason. I found more than one wiring diagram on the etrailer website with different pole assignments. This one was wrong... . I ended up using the configuration that matched the flat round to four round connector... . If I had used the wrong configuration recommended by the experts Q&A articles then my wiring would not have matched the factory converter. So I recommend wiring the Pollak PK11402 to match the Custer ADP001. 149546

- PK11402

by: John R.06/19/2012

Easy to locate within the web site and easy to order, Price is good. As always, shipping charges can be irksome - but the shipment tracking and followup provided - all help off-set the charge. I appreciate being able to purchase name brand items at reasonable prices. 44751

- PK11402

by: J D Nevada08/25/2013

This is the first time I have changed out a 4-way flat for a 4-way round. Easy to do once I figured out what needed to be done. The on-line instructions were very helpful. Project turned out well. Good product and have had no problems on the road. JD 96867

- PK11402

by: Ron B12/11/2015

Product was exactly as listed. I'm using it to plug a salt spreader into the truck. Should make plugging it in much easier than the old beat up factory harness. Extremely fast shipping. Etrailer will now be where I get all of my trailer parts. 233563

- PK11402

by: Dave H.07/10/2015

Nice and sturdy, easy to attach wires. Recommend you use some sort of insulator/tape around wire at hold down clamp. Fits a little snug first times on and off receptacle. I am using as adapter to a 4 wire flat trailer connector. 210784

- PK11402

by: Kevin S05/12/2015

Needed a hard to find 4 post plug. Order process was easy. Shipped and arrived in timely fashion. The product is exactly as represented and of nice quality. 192016

- PK11402

by: Tom J.02/11/2017

Connector was high quality, delivery was fast, price was good, and packaging adequate. Nice to do business here. 340814

- PK11402

by: Darrell H09/10/2013

Just what we needed to fit our truck, shipped quick, I have bought from here before and will buy again. 99324

- PK11402

by: BobB12/30/2016

Every purchase has been the exact part needed. Great prices and fast shipping. Great job Thanks 328787

- PK11402

by: Jon H09/20/2016

This socket has a look and feel of quality and durability. Locks in tight with the female socket. 296810

- PK11402

by: Pete Y11/16/2016

Exactly as product described on web page. Order shipped & received very promptly. 317190

- PK11402

by: Scott S.08/09/2016

Great service. Just got home and haven't had a chance to put it on my trailer yet. 281989

- PK11402

by: Lee W07/16/2016

Great product, have used them for a long time, they last and don't corrode out. 272660

- PK11402

by: Mike04/29/2017

Used on tractor for auxiliary power to attachments. Has worked great. 373955

- PK11402

by: Darby H11/20/2013

Product was exactly as described. Fit perfectly. Really fast shipping. 107933

- PK11402

by: Jerry F.04/25/2014

Great company to deal with. Fast shipping and great communication. 127297

- PK11402

by: Cathy T04/20/2015

Fits HD Pollak Connector where other brands do not. 186701

- PK11402

by: Sid03/20/2014

Exactly what I needed.I have used them for years 121394

- PK11402

by: Jeff Z01/26/2017

Bought as a replacement and they were g reat? 335764

- PK11402

by: claire c10/13/2015

Fast service good people to do business with 229861

- PK11402

by: Excellent10/11/2016

Perfect fit. Much better than Northern Tool 306658

- PK11402

by: Rick G07/31/2012

Great alternative to flat-4 connectors. 49939

- PK11402

by: GDK05/04/2015

Pollak makes good quality products 189970

- PK11402

by: Dale T.03/24/2014

Excellant service & fast shipping. 121906

- PK11402

by: Frank H02/16/2017

customer service was exceptional! 344245

- PK11402

by: jack08/08/2015

too large diameter, will not fit. 217813

- PK11402

by: Ewald05/11/2011

Everything was great. Thanks 13341

- PK11402

by: Don10/01/2016

Great product fast shipping 302398

- PK11402

by: GDK03/20/2015

Connector works as expected 179938

- PK11402

by: K. Matherne05/12/2011

good qaulity and durable 13648

- PK11402

by: Joe Cockrell02/25/2014

Top of the line parts 117595

- PK11402

by: EDJ TOOLS INC10/27/2016


- PK11402

by: Dennis C.09/14/2013

just what I needed 99889

- PK11402

by: herb P.08/05/2016

A great item. 280267

- PK11402

by: Charles07/11/2016

It works. 270689


Very well, should last for years.

Charles - 07/11/2017

- PK11402

by: Wayne M02/09/2017

great 340293


Ask the Experts about this Pollak Wiring
Do you have a question about this Wiring?

  • 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 # 3808 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...

  • Can I Replace the Four Way Round Connector on My Roadmaster Magnetic Tow Lights, # RM-2100
  • Yes, you can re-wire the Roadmaster Deluxe Magnetic Tow Lights, part # RM-2100, to a different connector so it will connect to your motorhome. Most likely the 4 wires will be the standard colors and will wire up color to color. These colors are: Green, Right turn Yellow, Left turn White, Ground Brown, Tail/Marker Typically, the connector is wired in this way: The green wire will be on the top left, the yellow wire will be on the top right, the brown will be on the bottom left,...
    view full answer...

  • Correct wiring for the Pollock part # PK11402
  • The typical wiring for a 4-Way round electrical connector are: White - Ground Return Green - Right Turn and Brake Light Yellow/Red - Left Turn and Brake Light Brown - Tail Light There are two ways for you to determine the functionality for each of your wires: You can either trace each wire to determine which lamp it feeds, or, you can use a 12 volt automotive battery and apply power to each circuit to determine its function. Ground the negative post to the battery to the trailer...
    view full answer...

  • How to Wire a Mini Truck to be Flat Towed by a 1990 Holiday Rambler Motorhome
  • Wiring your Subaru Sambar to be flat towed by your 1990 Holiday Rambler motor home will require the installation of diodes inline with the Sambar taillight wiring. You will need to start with a diode kit like the Tail Light Isolating Diode System with Wiring Harness, item # 38955. We have detailed instructions for wiring a towed vehicle, see link, and I have attached a diagram, see link at right, that shows how to wire the towed vehicle. We also have a video installation for you to...
    view full answer...

  • 4-Pole Round Pin Trailer & Vehicle Connectors to Allow Conversion from 4-Pole Flat Connectors
  • We offer trailer connectors, sockets and plugs in many connector formats that you can view in the linked article on trailer wiring. I also linked our main page for all 4-pin round connectors such as vehicle-side female socket # RM-910030-1 and trailer-side male plug # PK11402. We also have a kit with both, part # RM-910030-4 from Roadmaster. You'll want to be sure to wire the new connectors based on each wire's function, not by its wiring insulation color as this is not always consistent.
    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...

  • 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...

  • Best Way to Connect a 4-Way Round Trailer End to 4-Way Flat Vehicle End
  • The easiest way to get your 4-Way flat vehicle end to connect to your trailer with a 4-Way round is to remove the 4-way round from your trailer and connect the wires to a Draw-Tite 4-Pole Trailer End Connector, part # 18004. This will give you a 4-Way flat on your trailer. In general, on a trailer, the white wire is the ground wire, the yellow wire transmits the left turn/brake signal, the green wire transmits the right turn/brake signal, and the brown wire is the running lights. I...
    view full answer...

  • Will the Hopkins Universal Tail Light Wiring Kit # HM55999 Fit a 2001 Suzuki XL-7
  • Yes, the Hopkins Universal Tail Light Wiring Kit, # HM55999, will work with your 2001 Suzuki XL-7. this is a universal wiring harness that is designed to fit many different vehicles, including your XL-7. In addition to this harness, you will also want to pick up a trailer connector that matches the trailer connector on your motor home or tow vehicle. Most motor homes or tow vehicles will use either a 4-way flat connector or a 4-way round connector for flat towing. If you have a 4-way...
    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...

  • 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...

  • Will the Roadmaster FuseMaster Fuse Bypass Fit a 2011 Ford Edge
  • Yes, the Roadmaster FuseMaster Fuse Bypass, # RM76511, will work on your 2011 Ford Edge. Using this fuse bypass will not affect the tail lights on your Edge or the tow dolly because they will receive power from the tow vehicle. If your tow dolly does not have tail lights and you plan on using the tail lights on your Edge, then you will also want a tail light wiring kit like the TowDaddy Custom Tail Light Wiring Kit, # TD3019. This wiring kit connects inline with your tail light wiring...
    view full answer...

  • How to Make a 4-way Round to 6-way Round Adapter
  • You are going to need to make an adapter to accomplish what you are trying to do. For that you would need the part # PK11402 for a 6-way and then part # 16-4B-1 for 4-way wiring and then a # PK11604 for a male 6-way or part # PK11609 for a female round 6-way.
    view full answer...

  • Tow Bar Wiring to Flat Tow a 2002 Chevy Silverado Behind a Dump Truck
  • If you replaced the 4-Way flat connector on the Diode kit # RM-154, you would just have to make sure it was wired to match what your dump trucks require. But yes, it will work. You could use 4-Way round trailer end # PK11402. Given the automatic lights on your truck it could cause some back feeding issues. You would either need to use 2 additional diodes # RM-690 for one, on the wires running from the running light circuit from the dump truck to the diodes included with # RM-154, forward...
    view full answer...

  • Replacing a 4-Round Connector with a 4-Flat on a Bayonet Trailer Towed by a 1999 Lincoln Navigator
  • If your trailer has a 4-Round that looks similar to # PK11402, you can clip off the plug and connect the wires to a 4-Flat that will fit the 4-Way on the 1999 Lincoln Navigator. You can use the Quick Fix(TM) 4 Pole Flat Trailer End, # HMC20031, or directly wire a trailer-side 4-pole connector like # 18004. The shielded pin is the ground and is usually a white wire. The pin next to that is for the tail and running lights and is usually a brown wire. The next pin is for left turn and is...
    view full answer...

  • What is the Wire Gauge Used in Hopkins Heavy-Duty Trailer Coiled Extension - 4-Pole Round
  • The Hopkins Coiled Extensions with the Nite-Blow such as # HM47045 use 16 gauge wires on the inside. Trailer wiring harnesses usually use 16 to 18 gauge wire for lighting functions and heavier wire for components that draw more amperage. On a 4-Way, you should have left and right turn signals/brake lights, running lights, and a ground so 16 gauge wire will work fine. But if it is for something other than lights then you would likely need to make an extension. We have jacketed 4-wire,...
    view full answer...

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Info for this part was:

Photos by:
Theodore B

Written by:
Tyler C

Expert Research:
Robert G

Expert Research:
Jeff D

Installed by:
Cole B

Expert Research:
Lori W

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