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Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End
Pollak

Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End

Part Number: PK11720
$13.45
Retail:$23.45
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Trailer Wiring
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Establish a secure connection between your trailer and semi or other tow vehicle with this 7-pole, solid pin, wire-insertion-style socket. Zinc die-cast socket is self-grounding and includes floating pins for easy alignment and maximum pin contact. Great Prices for the best trailer wiring from Pollak. Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End part number PK11720 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (134)
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Pollak Trailer Wiring - PK11720

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

Establish a secure connection between your trailer and semi or other tow vehicle with this 7-pole, solid pin, wire-insertion-style socket. Zinc die-cast socket is self-grounding and includes floating pins for easy alignment and maximum pin contact.


Features:

  • Zinc die-cast 7-pole socket connects trailer to towing vehicle
  • Round, floating, solid brass pins
    • Easy alignment and maximum contact
    • Minimum voltage drop is ensured
    • Dielectric (non-conducting) grease coating
      • Protects against corrosion and resistance
    • Wide range of wire gauges acceptable, from #16 wire to #8 ground wire
      • Ground terminal accepts minimum #14 gauge - maximum #8 gauge
      • All other terminals accept minimum #16 gauge - maximum #10 gauge
  • Self-grounding to #1 Ground Terminal
  • Slant-mounted with built-in drain slot on cover
    • Rids housing interior of accumulated moisture
    • Opens and closes with stainless steel spring
    • Bottom lip extended for better plug support
  • 2-Hole mounting style
  • Highest quality - meets and exceeds all standards of SAE J560
  • Interchangeable with all competitive makes


Specs:

  • Mounting dimensions: 2" diameter hole
  • Volt rating: 6 volts - 28 volts
  • Current rating: 40 continuous-duty amps
  • Wiring configuration:
    • Color - circuit - recommended wire gauge:
      • White - Ground Return - 10 gauge (FMVSS-121 Anti-lock Gauge - 8)
      • Black - Clearance, Side Marker, Identification - 12 gauge
      • Yellow - Left Turn and Hazard Signal - 12 gauge
      • Red - Stop Lamps and Anti-Lock Devices - 10 gauge (FMVSS-121 Anti-lock Gauge 10)
      • Green - Right Turn and Hazard Signal - 12 gauge
      • Brown - Tail, Rear Clearance, Marker and License-Plate Lamps - 12 gauge
      • Blue - Auxiliary Circuit/ABS - 10 gauge
  • 1-Year limited warranty


11-720 Pollak Heavy-Duty, 7-Way, Round Pin Trailer Wiring Socket - Vehicle End
Replaces 52016





Customer Satisfaction Score:


Customer Reviews

Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End - PK11720

Average Customer Rating:  4.9 out of 5 stars   (134 Customer Reviews)

Establish a secure connection between your trailer and semi or other tow vehicle with this 7-pole, solid pin, wire-insertion-style socket. Zinc die-cast socket is self-grounding and includes floating pins for easy alignment and maximum pin contact.

by:

Not using on a trailer, but making disconnect harness for quick attach snowblower to loader arm. Connection cord is 7 pin tractor trailer tether, Worked well.



by:

I would highly recommend this. It is heavy duty and quality built. A great value for the money



by:

Product is high quality & works great!

Can't
beat etrailer



by:

Awesome product selections and quick response towards shipping. Made me feel like I was actually getting somewhere. If you have a trailer, camper, or any type of tow behind application get HOOKED UP with this company. Very satisfied

Toby N. profile picture

Toby N.

6/9/2017

I hook and unhook my trailer about twice a day as I need my truck for hauling stone and dirt. I have put this through the ringer. Still good as new...Happy customer



by:

Excellent product! - have, over only a few years, steadily worked my way through progressively more durable trailer cable sockets. The last one was the Hopkins heavy-duty, or something to that effect. The plastic casing on it broke within three months. I'm really looking forward to putting these to the test - I'm a farrier - I pull a trailer every day; the traffic in this area means that I must rely on excellent contact between vehicle/trailer for turn / brake signals and functioning trailer brakes. Nothing less. These sockets are heavy, all-metal (zinc-coated - road salt shouldn't be a problem), with few / no seams. When the trailer end is plugged into the truck receiver - it's a nice tight fit, with no movement: it's locked in. There are only two drawbacks for the homeowner who is looking for the do-it-yourself package: if you are looking for a metal bracket that bolts underneath the truck bumper and holds this part - there isn't any. And no bolts, either. I don't know if they sell them for these - I didn't check. I simply manufactured my own. So far, I'm delighted with the product.



by:

I ordered the 7 pole socket (PK11720) and the rubber boot for it. (PK11761) Also a trailer end plug (PK11700) to fit into the socket. The items arrived on the exact estimated arrival date that I was given on the day of ordering.
Wiring the plug and the socket was very easy. Each terminal has a small screw that holds the end of the wire in place. It is a simple matter of threading the screw out, putting the wire in the hole, and then tightening the screw onto the wire.
The boot fits snugly onto the back of the socket.
I used these parts to repair the power cable assembly to a truck mounted forklift. The parts are exactly what was needed to replace what had been damaged. The quality is good and the prices are excellent. I will use etrailer.com in the future when I need related items. I am very pleased.



by:

Great Product. Just remember to order the boot for the back of it separate.



by:

This is much better than the OEM on my New Holland Tractor asit is made of metal. It also cost less than the all plastic replacement from the dealership. etrailer was fast with delivery. Thank you.

John G. profile picture

John G.

1/5/2017

It is working out very nicely, really glad I bought it!



by:

Quality product arrived on time. Will make future purchases with etrailer.com

Mike M. profile picture

Mike M.

10/12/2016

Performed as expected to date.



by:

Bought to replace a 12 year old Pollak identical connector that I removed and could not re-use due to wire connections on the back being corroded (road salt area). The 12 year old connector worked fine except the flip up cover was a bit stiff. The 12 year old connector was also made in USA. The new connector I just received is made in China. From the price, I had hoped it was still made in USA. It seems that most of the time I am disappointed with the newer imported China versions of products once manufactured in USA. So my expectations for this product to have a long life are not very high.



by:

Well I have not installed it yet, but it is marked for each trailer wire by color, matching much earlier models. Did not come with mounting screws and nuts, but not a big deal.



by:

Trailer plug works great.



by:

I could not find this style or make trailer plug in my local auto parts store. I got tired of trying to find it so I ordered it on line. etrailer was convenient and less expensive than any other website.



by:

The metal body and good quality pins and connections make this one the only one for a professional job.
Remember if you use dielectric grease and the rubber boot you'll never have corrosion in your connections . Dissimilar metals and weather are a bad combination.



by:

For me, and probably you, etrailer.com is a great place to shop/buy quality products. They give great follow up after ordering and fast shipping @ a fair price. I believe their service & pricing is unbeatable. I do shop for bargains & etrailer is @ the top of my list.



by:

Excellent product! I bought this to replace the old, brittle, and broken plastic trailer connector on my 1973 aluminum camper. The plastic one stood out against the aluminum which I didn't like. So, I'm excited how this will blend in and look more natural. Besides aesthetics, this very sturdy and ruggedly built. It will clearly outlast the camper, no doubt. Will definitely buy again if I find myself with a different camper in the future.



by:

Very fast service AGAIN! Always my first choice when shopping for trailer parts.



by:

This trailer lighting socket is excellent quality, and super fast shipping



by:

I got exactly what I expected. Great customer service & follow through.

Ken profile picture

Ken

1/29/2023

This is a quality socket that is being used to support electrical connections between my RV and toad. Its held up beautifully & I continue to be very pleased with it.



by:

Etrailer web site was easy to work with and outstanding communication with your orders. Package was also delivered earlier than expected. I would rank etrailer as A+



by:

Great construction of the product, durable enough to withstand harsh working conditions and "operators" I am using that term lightly due to the mishaps that occur on a regular basis at my location.



by:

Exactly as displayed on website.



by:

Best 7 pole connector out there!!!!



by:

replaced the plug socket on my 2012 silverado. The plug worked great.



by:

Great, Fast, Knowledgable and Polite Service. Return policy is also terrific no questions asked. I will use e trailer again. Thank You
Ken


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Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

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    I'd recommend you go with a proportional style controller like the Tekonsha Prodigy P2, part # 90885. A proportional controller has an internal sensor that determines how quickly the tow vehicle is braking and will send the appropriate amount of voltage to the trailer brakes so the trailer and tow vehicle stop at the same rate. This leads to safer, more predictable braking action. To install the controller, you'll need our Brake Controller Installation Kit, part # ETBC7. The kit contains...
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  • Availability of 7-Way Round Pin Wiring Extension
    We do offer quite a few types of trailer wiring adapters/extensions that can be seen by clicking on the linked page. Just select the vehicle end you need (we offer both 7-way round and 7-way flat blade style connectors) and then the other end you need. For a 7-way round pin to a 7-way blade you can use # HM47425. Or for a 7-way blade to a 7-way round use part # 47595 or # F77R. These products feature one male and one female connector. We do not have a male 7-way round pin to female 7-way...
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  • Parts Needed To Make A 7-Way Round Pin Extension
    Though we can get you what you will need you will have to assemble it. There are three parts that you will need to make a round 7-way round pin connector they're listed below: The Male 7-Way Round Connector # PK11702 Jacketed 7-Way Wiring (Sold by foot) # DW04914-1 you will have to purchase the quantity in the amount of extension length you will need. 7-Way Female Connector # PK11720 These three parts will easily wire to each other making your the 7 pin male to female trailer connector....
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  • 6-Pin Round Vehicle Connector To 7-Pin Round Commercial Trailer Connector
    I have a couple options as there is not one adapter from a 6-pin round vehicle connector to a 7-pin round commercial trailer connector. The first will combine a Adapter 6-Pole to 7-Pole Trailer Wiring Adapter # 47435 and a Pollak Trailer Connector Adapter # PK12727 to adapt your connections. Or you can wire in a Pollak 6-Pole, Round Pin, Trailer Wiring Connector # PK11604 to a Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket # PK11720. This will create your own wiring adapter....
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  • Diagram for 9-Pole and 7-Way Connectors
    I attached the picture you referenced to this page. If you click on it the picture should fill your screen and be easily viewable! The diagram shows a 9 pole and a 7-way connection pin out for wiring up an adapter. To do this you will need a replacement 7-blade connector like # PK12706. You will then disassemble the existing trailer connector and install the 7-way blade style connector. When you take apart the 9-pole connection point the functions should be labeled, and you will want...
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  • Trailer Brake Controller Install 2018 Mazda CX-9 Grand Touring
    Since you've got a few questions in here, in order to make sure everything is addressed clearly I'm going to list the answers to each of your numbered questions below. 1) You can test the wires using a Circuit Tester kit like # PTW2993 to determine which is the cold wire. Since auto manufacturers don't have a standard color they all use, it's tough to determine what is what on some manufacturers. The only way to truly know which wire is which on your vehicle is to test for power when the...
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  • Installing Brake Controller and Trailer Connector on 2003 Chevy Blazer
    Your Blazer is not prewired for a brake controller, but one can be installed using our Brake Controller Install Kit, part # ETBC7. The kit contains everything necessary to install a controller, including the 7-way connector. The 7-way connector included in the kit is actually an adapter meant to be plugged into an existing 4-pole trailer connector, but the connector on the adapter could be cut off and directly wired to the existing wires you located near the spare tire. The white wire...
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  • Rubber Boot For Wire Protection On Pollak Trailer Wiring Socket - Vehicle End, # PK11720,
    Yes we do sell a rubber socket boot for the Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End, # PK11720. The product is Pollak 7-Pole Rubber Socket Boot, # PK11761, that fits over the back of the socket. Our website is not showing a picture right now so I will send you a separate email with a picture of the rubber boot.
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    The warning light for the Invisibrake needs to connect to the stoplight switch circuit of the towed vehicle so that you know when the brakes of the vehicle are getting applied. This would not be a connection made on the Freightliner's wiring like you mentioned. I attached a diagram that shows how the monitor system wires up for you to check out as well.
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  • The Two Ways that Trailer 7-Way Wiring Colors are Used
    This is a really good question! So it turns out there are two ways that 7-way wire colors are ran. The one like what you described is considered 7-way traditional whereas the other style is considered RV standard. I attached a diagram that hopefully better explains the difference.
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  • Wire Coding For Pollak 7-Pole Trailer Wiring Socket # PK11720
    When looking at The Pollak 7-Pole Trailer Wiring Socket # PK11720 at the six O'clock position is where the purple reverse light connects. I will attach a picture below showing all the functions of the socket.
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  • Stoplight Circuit for Installing Brake Controller Location in 2009 Toyota Highlander Hybrid
    One of the wires on your 2009 Toyota Highlander Hybrid (should be the blue one) should have voltage when the brakes are applied only, but if for some reason that just isn't the case the next best place to find the stoplight circuit would be from the third brake power wire as it similarly only has voltage when the brakes are applied. That said, one of the red wires of the T-one trailer wiring kit you have installed on your Highlander also would carry just a stoplight circuit so that could...
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  • How can I get the Cold Side of the Brake Switch on my 2015 Chevrolet Express Van?
    You aren't alone here! This is a very common issue that we get questions about quite regularly. There is a very simple solution for you available to correct this issue and get the brake signal that you need. You can simply use a Firestone Fuse Circuit Tap Kit part # F2526 and connect it in the fuse box located in the driver's under hood area. You will use a grommet already in the firewall of your Express to pass the wire through and make you connection. I've included a video my buddy Rob...
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  • How To Find Cold Side Of Stop Light Switch On Vehicle For Brake Controller Installation
    Normally you can find the brake light switch under the dashboard at the top of the brake pedal. There could be a number of wires attached to the switch so you can use a tester like part # PTW2993 to test the wires. Since the auto manufacturers can use different color wires it is always best to use a tester and check the wires for function and not color. You would need to find the wire that only shows power when the brake pedal is pressed. That would be the wore that gets attached to the...
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  • Finding Stoplight Circuit for Installing Brake Controller in 2004 Jeep Grand Cherokee
    We luckily had the chance to install a brake controller in a 2004 Jeep Grand Cherokee just like yours and we found that the cold side of the brake switch wire was purple and brown. I attached an install video that shows the P2 part # 90885 installed in a 2004 Grand Cherokee just like yours.
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  • How to Extend the Reach of 7-Pole Round Adapter for Hopkins Tow Doctor Vehicle End Test Unit
    Thank you for your purchase of the Hopkins Tow Doctor Vehicle End Test Unit # HM50918, and I'm glad you are enjoying it! Hopkins doesn't make a version of the 7-Pole, Round-Pin Adapter # HM50944 with a longer wire lead, but you can still build out your own using 25' of this Deka Jacketed 7-Way Wire # DK74FR (sold by the foot) and then Vehicle End # PK11720 and Trailer End # PK11702 connectors. I reached out to my contact at Hopkins who confirmed this for me.
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  • Converting a Semi 7-Way Trailer Connector to an RV 7-Way Trailer Connector
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  • Finding Stoplight Switch Circuit for Installing Brake Controller in a 2008 Jeep Grand Cherokee
    It SHOULD be a purple and brown wire. But I recommend testing all of the wires that run to the stoplight switch of your 2008 Jeep Grand Cherokee till you find the one that has 12 volts only when the brakes are applied. If you need a circuit tester you'd want the part # PTW2993.
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    According to our records, the cold brake switch wire on a 2004 Dodge Ram 2500 should be a white/tan wire. Wire color is not always universal, so if you do not find a white/tan wire, you can use a wire tester like part # PTW2993 to determine wire function.
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  • Availability of 7-Pole Round Extension Cord
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  • Adapting 7-Way Round Pin on Mack Semi-Tractor to 7-Way Blade Style RV Connector
    A 7-pin connector on a Mack Tractor like you described would function a bit differently than a 7-way blade-style RV connector. The difference is the right and left turn pins on the 7-way blade also carry the signal for the brake lamps while on the 7-pin, one pin carries the right turn lamp, one the left and another carries the brake lamp signal. In order to combine those three signals onto two circuits, you'll need a taillight converter. There isn't an off-the-shelf adapter that'll do...
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  • Will the 7-Pole Rubber Socket Boot Fit on the Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket
    Yes, the 7-Pole Rubber Socket Boot, # PK11761, works with 3 of the Pollak heavy duty wiring sockets that we carry. You can use it with part # PK11720 that you mentioned and it can also be used with part # PK12801 and # PK11851. The hole in the back of the boot is just under 7/16 inch and measures .425 with a dial caliper. I produced a short video showing how the boot fits on each item for you.
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  • Are there Round or Blade Pins in the 4-Way to 7-Way Trailer Connector Adapter # 37185
    The 4-Pole to 7 and 4-Pole adapter # 37185 uses blade style pins. I have included a picture for you to view. If you need to install a 7-Way round pin vehicle side connector you can use # PK11720. You will need to hardwire the wires to the back. You will also need rubber boot # PK11761 and mounting bracket # PK11771. Or you could install the 37185 and use an adapter to go from the 7-Way blade to a 7-Way round pin, # 47595.
    view full answer...
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