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Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End

Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End

Item # PK12703
Our Price: $11.02
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Trailer Wiring
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Establish a secure connection between your towing vehicle and trailer with this 7-pole, RV-style socket. Metal 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 Metal 7-Pole, RV-Style Trailer Socket - Vehicle End part number PK12703 can be ordered online at or call 1-800-496-5010 for expert service.
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Pollak Trailer Wiring - PK12703

  • 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-style socket. Metal socket has non-corroding, shock-resistant interior design that eliminates shorting out and is color coded to RVI standards.


  • Standard, 7-pole, RV-style socket connects tow vehicle to trailer
  • Heavily plated metal construction
    • Resistant to weather and corrosion
  • 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 cover with stainless steel spring
  • 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
  • At its widest point, the diameter of the round portion 1-7/8"
  • Mounting holes are 1-1/2" from center to center vertically and 2-3/16" from center to center horizontally
  • 1-Year limited warranty

12-703 Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End
Replaces 30310

Customer Satisfaction Score:

Customer Reviews

Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End - PK12703

Average Customer Rating:  4.8 out of 5 stars   (75 Customer Reviews)

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


Going to rewire my pickup truck trailer circuit , this is last piece I needed. This is high quality plug for my r v . Thanks


As advertised and great customer service. Highly recommended. A++++


Very heavy duty connector, metal body, brass terminals, metal locking pin. We use them for construction work all day long. They will take the abuse the workers put them through.


Good quality product. MUCH BETTER THAN THE BLACK PLASTIC VERSION of this item.
I mounted this under the back bumper of my SUV so that it is inconspicuous from view.


In use for 6 months now. So far so good!


Still very happy with this unit I sold that truck But remove the trailer plug from It & reinstalled it on my replacement truck & still use it,
this was worth the effort.


good product made of steel not plastic,made in tiawan ,better than china,would like one made in USA. maybe etrailer can find more parts made in USA i would be willing to pay more.its time to take back our country,the USA.

good so far i need to find a steel plug for the trailer now.
bruce - 07/23/2014


Bought this after the cover on my plastic one broke in half so it would not hold the plug in. (It was -20° though). Solids well made piece, nothing here will break at -20°. Etrailer was the only place I could find one that is all metal. Placed the order and had it in hand in 3 days. Never let down by Etrailer.

After 1 year its holding up great. No signs of rust either, Minnesota loves salting the h*ll out of the roads in the winter. I did give the inside contacts a good coat of dielectric grease And they are looking god too. Great product.
Steven - 02/07/2020


Does what it is supposed to do.


Heavy duty metal not plastic


Easy to install and works great. Can always rely on etrailer for great parts, fast shipping, and the best price around.

Everything seems to be working well.
Patrick - 04/01/2019


Product is much better than the plastic version. The receptacle has a very strong spring on the lid and a hook to lock the trailer plug into it.
The plug is galvanized and not stainless how ever, so it will corrode and rust in the Wisconsin rust belt eventually. After 1 year how ever it is fine.
I bought the metal version for out custom work trucks that I build for our company. The protective lids on the plastic ones were getting broken. The metal plug is more durable and has solved that issue.


Just what I needed . Super fast shipping and excellent product .


I am very grateful to etrailer for always providing excellent service. Orders are received in a timely and accurate fashion. The quality of their products is superb. All items ordered function as described with no malfunctions. The trailer and vehicle wiring connectors I have ordered were a great replacement for old existing equipment that was constantly failing.
Very professional company. Very high quality products. I look forward to continued business with them.


Everything arrived as expected and all fit perfectly!! This is not my first purchase from etrailer, and as before, shipping was timely and all components were as they advertised them to be. I will not hesitate to order again when I need something they offer.


JENA D i've used these plug ins for my shear that attaches to my skid loader. Were in the iron and steel business, my wife irons and i steel. I've used these plug ins for about 19 years now and have had real good luck with them.YOU got the order right and they arrived on time who do i talk to about getting YOU a raise. Thanks again Donnie


Good quality, excellent product.
only thing they missed IMHO is to put a rubber gasket to the cap.


Works great, Very easy to install. The rubber plug in the back is the only difficult part to deal with. I Place a dab of silicone around it to make a better water proof fit.


After having to replace numerous plastic sockets over the years I have finally found a robust alternative. Sturdy and well made. Not the cheap articles found in most places. Installed and used already they are not as bulky looking as the cheaper models so they don't protrude out but hug to the bumper. The salesman was very helpful and professional. Answering questions I posed to him.
Will purchase from them again.


After being unhappy with plastic connectors I picked one of these up and it seems to fix all my problems with covers breaking off.


Great RV receptacle. I prefer metal housings like this as opposed to plastics that can break at low temps. They shipped promptly as promised. Thanks eTrailer!


Great product that is still in great shape despite riding underneath my off road vehicle on some seriously tough trails throughout the 4 Corners.


great product super durable can't go by the colors on the back of the connector though


This looks pretty good, again I haven't had a chance to install it yet, but I'm sure it'll work fine. Maybe I'll report back once I have it installed and working.

Worked perfectly! The one on our 23 year old rig was looking a bit worn so it made sense to replace it as this was our first attempt at towing. Again, good quality and so far its still working!
Paul M - 05/31/2020


Far better than the plastic stuff!

Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

  • Replacing the Car End of a 7-Way Metal Trailer Connector
    You can replace just the car end, if the trailer end connector is not broken you do not need to replace it. You will just need to remove the broken connector and attach the wires to their respective pins on the 7-Way Metal Trailer Connector, Car End, item # PK12703. You can use the wiring diagram on our Trailer Wiring Diagrams page see link to wire the connector to your vehicles wiring. When looking at the wiring diagram keep in mind that we are showing the connection points inside the...
    view full answer...
  • Where to Attach Auxillary Power Wire on Vehicle Side 7-Way connector on 2001 Ford F-350
    Yes, you will use the number 4 pin on your 7-way connector, item # PK12703, which may also be labeled Red. The normal attachment is a Black 10 gauge wire to this connection for charging the trailers battery and powering 12 volt accessories.
    view full answer...
  • Brake Controller Install Recommendation for a 2013 Chevy Silverado
    For your 2013 Chevy Silverado there is brake controller wiring available under the dash. Below the steering column, there is a bundle of wires tied together with white tape, located left of the brake pedal. This bundle of wires is the tow package for the brake controller. Carefully cut the white tape binding the wires, and pull the wires down from underneath the steering column. You will use these wires to wire up the controller. There is a few connections that need to be made under the...
    view full answer...
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  • No Power on Any of the 7-Way Connector Pins on a 2006 GMC Envoy
    There is a fuse in the under hood fuse box on your 2006 GMC Envoy that is probably the one you are looking for. It is in location 32 labeled Trailer. If you find that replacing that fuse does not help then it could be a body control module or one of fuses for it.
    view full answer...
  • Wire Functions/Locations for a Trailer Side 6-Way Connector
    GD is ground LT is left turn/brake lights RT is right turn/brake lights TM is tail lights AS is likely auxiliary 12 volt power which was probably used to run the pump I have also included a picture that shows the basic layout of a 6-Way connector, trailer side. Please note that in some situations the brake and 12 volt power circuits are switched.
    view full answer...
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  • What Connections Need to be Made for a 2009 Chevy Silverado to Complete the 7-way Wiring
    There are two wires that will need to be connected under the hood of your 2009 Chevy Silverado before the 7-way will be fully functional. Check out the FAQ article I attached that shows how this is done. If you have already done this and you still are having an issue with the truck not having voltage mid-truck then you will need to trace the wiring back to find where the voltage stops and fix as necessary.
    view full answer...
  • Activating 12-Volt Accessory Circuit to 7-Way on 2004 Chevy Silverado 2500
    The pin in the 1:00 position on your 7-way is fed by the auxiliary power circuit. The wire feeding that circuit runs to the engine compartment and terminates under the brake booster and master cylinder and will have a ring terminal on the end of it. The ring terminal will connect to the front power post on the fuse box under the hood. A 40 amp fuse will need to be installed in the location closest to the power post to activate the circuit. I have edited a photo for you showing the fuse...
    view full answer...
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  • How to Make the 12 Volt Accessory Circuit Active on a 2004 Chevy Silverado 7-Way
    Yes, there is a connection that will need to be made for the 12 volt accessory circuit of the 7-way on your 2004 Chevy Silverado active. This is the circuit that will power the cargo lights on your trailer. Check out the FAQ article I attached that details what you will need to do. Step F deals specifically with the connections and fuses that are needed for the 12 volt circuit.
    view full answer...
  • Are the Pins of a 7-Way Trailer Socket Supposed to be Bent
    If the pins of your current 7-way are bent down and do not look like the pins in the 7-way picture that I attached you would need to either bend them back so that they make contact again or replace the entire socket with something like the part # PK12703 that you referenced. Your bent posts are the reason your trailer wiring is working properly.
    view full answer...
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  • Does Trailer Ground Circuit Run to Trailer Frame
    The ground circuit of trailer wiring does often times run straight to the frame of the trailer. This makes for easier ground wiring of all the circuits that are on the trailer wiring. Instead of having to route every ground wire back to the trailer connector you can just wire it to the nearest section of trailer frame.
    view full answer...
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  • Troubleshooting Trailer Lights that Dont Work When Headlights are On
    The problem you are having is a classic ground issue. If the ground wire to the trailer frame or the tail light grounds are not connected securely to clean, rust and paint free surfaces then when the headlights are turned on the extra amperage draw for the running lights will cause all sorts of lighting issues. I would start by removing the ground wire at the trailer coupler and cleaning up the connection point and re-securing it to the trailer frame. Next I would check the ground connection...
    view full answer...
  • Troubleshooting Trailer Brake Blinkers that Both Blink At the Same Time
    It sounds like you have the left turn/brake light circuit and the right turn/ brake light circuit wires touching each other so that when you put on either blinker it send current to both sides of your trailer wiring. I would recommend you inspect the wiring of your Pollak 7-Way # PK12703 and check to see if there is any exposed wires that are touching each other that could be causing the problem you are experiencing. A lot of times when there is a bad ground you will see bizarre tail...
    view full answer...
  • Troubleshooting the 12 Volt Power Circuit on the 7-Way of a 2008 Chevy Silverado 2500
    The first thing I would check once you have the connector wired up and the circuit appears to go dead would be for voltage on the wire before the connector. You said that the circuit appears to go dead once the connector is attached testing the wire of the circuit before the connector will allow you to determine if the problem is in the connector or on the circuit. If there is voltage on the circuit before the connector but not at the 1:00 position of the 7-way then you know that the...
    view full answer...
  • 12 Volt Power on the Brake Output Pin All the Time On 7-Way Trailer Connector on 1998 Ford Explorer
    There can be a very small amount of power on the brake output circuit of a 7-Way (5:00 position) which would be the brake controller checking for a trailer, but there should not be 12 volts of power. That indicates a short of some kind or a problem with the brake controller. Since you said you recently added the 7-Way it is possible that inside the connector where the wires attach the 12 volt circuit wire is touching the brake output circuit causing the constant draw. If you address that...
    view full answer...
  • How Does a Trailer Side and Vehicle Side 7-Way Get Wired
    You cannot go by wire color in most cases because there is no real standard. We have blue for trailer brakes, yellow for left turn/brake lights, brown for running lights, green for right turn/brakes, black for 12 volt power, white for ground, and purple for reverse or AUX power at the center. Since your lights are not working something must not be in the right spot. What you can do is touch each wire to the positive terminal of a separate 12 volt battery and see what lights up. Or you...
    view full answer...
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  • No Brake Lights and Turn Signal Power on the Trailer Wiring on a 2006 GMC Duramax
    There would not be any additional fuses for the brake lights and turn signals for the trailer wiring on your 2006 GMC Sierra. There may be relays related to the tow package that could be bad if the fuses were blown. I would check your owners manual or your fuse boxes to look for any relays related to the tow package and replace them as well. I could not locate a copy of an owners manual for a 2006 GMC Sierra, so I do not have specific locations if they exist. Another possibility may be...
    view full answer...
  • Troubleshooting Trailer Running Light Circuits Not Functioning on a 2004 Chevy Silverado 7-Way
    I would start troubleshooting at the connector itself. Take the connection apart and make sure there are no bent pins or corroded terminals that could cause the tail light function not to work. Next, I would check the fuse block under the hood of the truck again. There should be a slot for a tow package fuse in there. Check the legend under the fuse block cover and you may find that this fuse is missing or that it has blown, and needs to be replaced. I know you said you checked there once,...
    view full answer...
  • Which Fuse Provides 12-Volts to 7-Way Connector on 2009 Chevy Silverado 3500 Diesel
    If the 12-volt pin on your trailer connector isn't working, you've got a missing or blown fuse or the wiring connection at the fuse box under the hood wasn't finalized. You're looking for a 40 amp fuse, located in position # 68 in the fuse box under the hood. The fuse protects one of the nearby power studs on the side of the fuse box, which is where the wire that provides power to the 7-way should be connected. If it's not, you can find the wire bundled up under the master cylinder (see...
    view full answer...
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  • Troubleshooting Trailer Blinkers Where When One is Activated the Other Blinks Dimly
    We had this exact same problem in our shop the other day and the problem turned out to be that the grounds of the trailer light assemblies weren't sufficient. By grounding the light assemblies better the problem went away. You can also check to make sure that the main ground strap from the trailer connector that runs to the trailer frame is connected properly. If that does not fix the problem you can run the grounds from the assemblies straight to the main ground wire of the trailer connector....
    view full answer...
  • Troubleshooting Trailer Brakes that Lock Up When Vehicle Brakes Are Touched
    Sounds like one of the stop/turn signal circuits is shorting out to the brake output circuit which is causing 12 volts to apply to your trailer brakes when the brake lights illuminate. To narrow down which blinker circuit is at fault apply each of the blinkers and the brakes will start pulsating with the blinker that carries the circuit with the short. You would need to go over the wiring on your truck and trailer to find the cut or exposed wire and fix as needed. Corrosion can also cause...
    view full answer...
  • Why Do Some Trailers Have Different Color Wires?
    Trailer wire color varies depending on the trailer. ALWAYS go by function and not by color. Regardless of what kind of connection # PK12703 you're using. I would look at your trailer's manual or you can just test the function. I've included a diagram to help you with the testing and setup of your trailer.
    view full answer...
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  • Troubleshooting 2015 Dodge Ram 1500 that Says Trailer Connected All the Time
    The issue you are more than likely having is that you have some corrosion on the pins of your trailer wiring connector which is tricking the computer of your truck into thinking you have a trailer connected as it's sensing a slightly draw similar to brake magnets or trailer lights. The really easy fix is to take some sandpaper to the pins of the 7-way to clean them all off and the issue will go away.
    view full answer...
  • Why Would Truck's Trailer Taillight Circuit Turn On/Off With Vehicle Gear Selector
    Modern vehicles/trucks have interesting running light circuits. Some vehicles have day time running lights that are on all the time which would be similar to having the vehicle running lights activated. This might cause the trailer running lights circuit to be active at all times too but it depends on how closely this circuit is wired to the vehicle lights. Some vehicles will have the running lights turn on or off depending on if you are in drive or park which also could affect the running...
    view full answer...
  • Activating Brake Controller Wiring on 2000 GMC Yukon XL
    On your 2000 GMC Yukon XL 2500 there are a few connections you need to make under the hood to activate the brake controller wiring of the vehicle. If you check out the attached link on this page you'll see all the steps needed to activate all of it.
    view full answer...

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