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

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

Item # PK11720
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Pollak 7 Round Wiring - PK11720
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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. Lowest Prices for the best 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 800-298-1624 for expert service.
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Pollak Wiring - PK11720

  • Trailer Connectors
  • Vehicle End Connector
  • 7 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 Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (77 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.

- PK11720
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.



- PK11720
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.



- PK11720
by:

Very good product, and delivery was fas t.



- PK11720
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.



- PK11720
by:

Excellent quality. Works great, no complaints. Would definitely buy again



- PK11720
by:

fast friendly service



- PK11720
by:

Good heavy plug would buy again



- PK11720
by:

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


Comments
Performed as expected to date.
Mike M - 10/12/2016



- PK11720
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.



- PK11720
by:

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



- PK11720
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.



- PK11720
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.



- PK11720
by:

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



- PK11720
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.



- PK11720
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


Comments
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
Toby N - 06/09/2017



- PK11720
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.



- PK11720
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.


Comments
It is working out very nicely, really glad I bought it!
John G - 01/05/2017



- PK11720
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.



- PK11720
by:

excellent service, great price and fast delivery : )



- PK11720
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.



- PK11720
by:

Have not used this yet but it looks like it is made with quality. I look forward to having it for use on my pickup truck.



- PK11720
by:

Excellent quality at a reasonable price.


Comments
As far as I know fine. It was part of a test fixture for a student project.The company was impressed with the fixture, and took it with them.
Jeff W - 11/17/2017



- PK11720
by:

I was able to find the product very easily on the website. The part was shipped fast, and arrived fast. Paying for the product was fast and easy with PayPal it was also secure. The part was clean and steady, with all the requested materials in the box.



- PK11720
by:

very well made, make sure to get the rubber boot with it.



- PK11720
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

Ask the Experts about this Pollak Wiring

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    We actually do have wiring adapters available that go from a 7-Way blade connector on the truck to a 7-Way round on the trailer, such as with the Pollak # PK12727, however since the circuits are separated on the trailer side an additional converter would still need to be added and the adapter itself would likely need to be re-wired. For this reason I recommend going a different route. I honestly think the easiest solution is going to be to simply add a second 7-Way on your truck, using...
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    It sounds like your 2005 Ford Super Duty was outfitted with the 7-way blade system which is the most common in the market today. To adapt your 7-way blade to a 7-pole round for your trailer, I recommend the Pollack # PK12728. This 7-pole connector is prewired to simply plug into your truck's 7-way plug. It has the # PK11720 connector you referenced but is pre-wired like you are desiring. A great mounting bracket for the # PK12728 is the # PK11771. I have linked all the above...
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  • How To Find Cold Side Of Stop Light Switch On Vehicle For Brake Controller Installation
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  • What Wire Color Codes and Functions Are Used for Pollak Connecter 12-705 and PK11720
    There is no industry standard wiring code. Pollak uses the following: White - Ground Return Black - Clearance, Side Marker, Identification Yellow - Left Turn and Hazard Signal Red - Stop Lamps and Anti-Lock Devices Green - Right Turn and Hazard Signal Brown - Tail, Rear Clearance, Marker and License-Plate Lamps Blue - Auxiliary Circuit/ABS We have a different combination of colors we use for specific functions which you can see in the wiring FAQ article that I have linked. Finally,...
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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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  • Mounting Hole Dimensions for the Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket
    The distance between the mounting holes for the Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket # PK11720 is 3" on center. I have attached a photo to demonstrate this as well as a review video where this measurement is shown. We also carry the Pollak Bracket # PK11771 which can help make installing this socket easier. This has 1/4" diameter holes to mount the socket and then 1/2" x 3/8" mounting holes for the bracket itself. The mounting hardware is sold separately but can...
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  • Wiring Diagram for Pollak Heavy Duty 7-Way part # PK11720
    The Pollak Heavy Duty 7-Way part # PK11720 that you referenced is a heavy duty style 7-way. If you check out the attached diagram you'll see how it should be wired.
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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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  • How to Wire the Pollak 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End # PK11720
    On the back of the Pollak 7-Pole, Round Pin Trailer Wiring Socket - Vehicle End, part # PK11720, it is marked alongside the pin with the color of the wire that connects to that pin location. I am also including a photo that will show a 7-Way round pin connector for the vehicle end with the colors and functions listed for each pin. I am also including a link to a FAQ page on trailer wiring.
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  • Difference Between Solid and Split Round Pin 7-Way Connectors
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  • Wiring Diagrams for 7-Way Round Trailer Connectors
    I attached a diagram that shows how most 7-way rounds like the # PK11720 that you referenced will get wired up. As long as you got yours wired up correctly and your trailer taillights and brakes are functioning correctly that's all that should matter, but occasionally there are some trailers that end up wired slightly different than others so the diagrams we offer don't match up perfectly. In those cases you have to wire up everything by function so that everything matches up properly....
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  • Installing 7-Way Trailer Connector and Brake Controller On 2003 Chevy Blazer
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  • Wiring Configuration For 7-Way Vehicle And Trailer Connectors
    I have attached a photo that details the wiring connections for a 7-pole round pin connector. It also includes the vehicle side wiring as well. I have also attached a photo of the 7-way blade style connector as well. The center plus is an auxiliary 12V circuit. I do recommend using a circuit tester like part # 40376 and test each wire on the vehicle to make sure you have the correct configuration on your connector. I have also attached a link to a helpful article about trailer wiring...
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  • Adding Reverse Lights To Semi Trailer 48 Foot Flatbed Through Connecting to 7-Way
    If you use the 7-way that is used for commercial/industrial/agricultural application like # PK11720 or the RV/standard 7-way like # HM47210 you will need to utilize the same location. The reverse signal should be connected to the center location of either application. You will simply need to make sure your wiring corresponds with the function locations. I've attached a photo to assist. For a 7-pin that normally does not have a reverse light, that means utilizing the auxiliary in...
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    I do not have dependable reference material showing exactly which trailer connector a 1966 Airstream might've used, but the most simple solution in your case would be to remove the existing plug and replace it with one that's compatible with the much more common 7-way blade connector, which is what most manufacturers use as original equipment on later model trucks. You can simply disconnect the wires from the rear of your existing plug and install a plug like # PK12706. You'll need...
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    Image 1 for
  • 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...
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  • Is it Better to Switch to a 7-Way Blade Style Trailer Connector Over a 7-Way Round Pin
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    Image 1 for
  • Semi Trailer Light Function Locations on Heavy Duty 7-Way Pin Connection
    On a 7 pin round which is the common connection on a semi trailer, the clearance/marker lights are at the 10 o clock position when you look at the trailer wiring connection. When looking at the connector on the back of the truck, that will put the same function at the 2 o'clock position pin. I've attached a photo of each to assist.
    view full answer...
    Image 1 for Image 2 for
  • Pin-Out Wiring Diagram for a Trailer Side and Vehicle Side 7-Way Blade Style Trailer Connector
    I can certainly help you out. First, I have included a link to our wiring FAQ article that shows how to wire both the vehicle side and trailer side connectors. The section you need is about in the center of the article and says 7 Way Trailer Connector followed by 7 Way Vehicle Connector. I will also give you a quick explanation below. When looking at the back of the TRAILER SIDE connector where the wires attach: 1 oclock position (pin 4) = 12 volt battery power 3 oclock position...
    view full answer...

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Info for this part was:

Employee Jackie C
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Jackie C
Employee Mike L
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Mike L
Employee Michael H
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Michael H
Employee Jeff D
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Jeff D
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