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Custer Trailer Connector Adapter w/ Dust Cover - 7-Pole Round Pin to 7-Way Blade

Custer Trailer Connector Adapter w/ Dust Cover - 7-Pole Round Pin to 7-Way Blade

Item # F77R
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This adapter converts your 7-way round pin connector to a RV-style, 7-way blade connector. Built-in ABS plastic cover protects the 7-way blade terminal from dust and moisture. Pull grips on the round end make the plug easy to install and remove. Lowest Prices for the best trailer wiring from Brophy. Custer Trailer Connector Adapter w/ Dust Cover - 7-Pole Round Pin to 7-Way Blade part number F77R can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (39)
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Brophy Trailer Wiring - F77R

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Round - Round
  • Plug and Lead
  • 0 - 5 Feet Long
  • 7 Round - Blade
  • Brophy

This adapter converts your 7-way round pin connector to a RV-style, 7-way blade connector. Built-in ABS plastic cover protects the 7-way blade terminal from dust and moisture. Pull grips on the round end make the plug easy to install and remove.


Features:

  • Adapter converts your 7-way round pin connector to a 7-way RV-style connector
  • Built-in cover protects the 7-way blade end from dirt and moisture when not in use
    • Hinged cover opens 180 degrees for effortless connection
  • Pull grips on the 7-way round pin connector make plug easy to install and remove
  • ABS plastic construction is strong and durable
  • Flexible wire between plugs provides wide range of motion


Specs:

  • Overall length: 14"
  • Length between the plugs: 6"


This adapter allows the 7-Way, round-pin, vehicle-end connector to work with the 7-way blade, RV-style, trailer-end connector on the right.


7-Way, Round-Pin, Vehicle-End Connector

7-Way, RV-Style, Trailer-End Connector


F77R Custer Trailer Connector Adaptor with Dust Cover - 7-Pole Round to 7-Blade






Customer Reviews

Custer Trailer Connector Adapter w/ Dust Cover - 7-Pole Round Pin to 7-Way Blade - F77R

Average Customer Rating:  4.6 out of 5 stars   (39 Customer Reviews)

This adapter converts your 7-way round pin connector to a RV-style, 7-way blade connector. Built-in ABS plastic cover protects the 7-way blade terminal from dust and moisture. Pull grips on the round end make the plug easy to install and remove.

by:

This product did not work. The diameter of the 7 pin receptacle plug was 1/8” narrower than my trailer plug. It fit perfectly into the 7 way blade receiver plug on my truck. I called customer service. She called manufacturer and manufacturer said there must be something wrong with my trailer plug. My trailer plug came standard on the trailer. Unfortunately no inside diameters are provided so one cannot measure before ordering. I am returning the product but was told I have to pay for shipping. etrailer has such a good reputation. I am really disappointed in this experience.


Comments
I will have our customer service team reach out to you. This adapter is intended to work with most 7-way blade, RV-style trailer side plugs.
-- Etrailer Expert Jenny N - 10/25/2021

by:

Worked well as adaptor from Great Plains no till drill wiring harness to use on truck.



by:

I have ordered several of these in the past from etrailer. Great product, quick shipping, an overall Great company to do business with.


Comments
Ive heard no complaints from our employees who use these.
Jeff K - 09/21/2017


by:

Worked perfectly. Nice for towing farm equipment with a normal common plug from truck. Works great on my Ford trucks.



by:

Received quickly, worked with brake lights & turn signals, but not headlights or parking lights



by:

Exactly what we were looking for. Customer service was great and found the right product for our application in a few minutes, shipping was quick. We are on the road with lights and no rewiring.



by:

Product didnt work for my application even after talking to a tech and explaining what i needed after i returned the original i ordered so yeah good luck



by:

Was exactly what I wanted. The pictures online made it easy to identify the correct product so it was great to get the right part the first time and on time.



by:

Been looking for this application locally for a while. Happy to find it here. Haven't used it yet but it looks well made.



by:

Worked as listed. E-trailer has provided yet another good product delivered on time. Thanks



by:

Best adapter for the money. I am using it on farm equipment, so i can have lights when I tow with my truck.



by:

It works perfectly for what we needed!



by:

GREAT SERVICE GREAT PEOPLE TO DEAL WITH WAITED A LITTLE LONG FOR THE PART BUT OTHERWISE GREAT PRODUCTS THANKS AGAIN STEVE



by:

We have ordered 2 of these for our shop and love them. great quality not cheaply made. great customer service and fast delivery.



by:

Looks Heavy-Duty. We'll see how wiring matches-up!



by:

Works exactly as intended. I don't use it a lot, but I am happy with it.



by:

I placed two orders recently. The website is organized and I was able to find what I needed. I spoke with Customer Service and they were nothing but helpful. I will definitely use them again.



by:

Works great, Had to switch a few wires other than that works perfrect.



by:

Product showed up in a couple of days and works exactly as advertised , I couldn't of been happier with the whole experience.



by:



by:

This is a great product. Fits and works as described. It is built well and has lasted the first 6 months of use.



by:

Received ontime shipment easy website to figure out what I needed. Will use again



by:



by:

Works perfect for 7-round to 7-flat.



by:

Product works perfectly


25
39
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Ask the Experts about this Brophy Trailer Wiring



  • RV 7-Way to Round 7-Way Adapter Recommendation
    The part # F77R will plug into the RV style 7-way you have installed on your 2013 Ford F-250 and then will provide you with a 7-way round socket for your trailer to attach to. I attached a review video for you to check out as well.
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    Based on your pictures, you need a 7-way blade adapter to 7-way round trailer end. I have just what you need. I recommend the Custer Trailer Connector Adapter w/ Dust Cover - 7-Pole Round Pin to 7-Way Blade # F77R.
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  • Recommendation to Connect RV Style 7-Way on Truck to Round Pin 7-Way on Trailer
    In order to connect the 7-Way RV style connector (flat/blade pins) to the 7-Way round pin connector on your trailer, you will just need the Brophy Custer Trailer Connector Adapter # F77R. This adapter will plug right into the standard RV style 7-Way on your Silverado and provide a round pin connector for the trailer to attach to. I have attached a short video demonstration on this adapter that you can also check out.
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  • 7-Way Round to 7-Way Blade Adapter
    Since your light plugs into a 7-way round you'd actually need the opposite adapter than the # F77R. Which for that you'd just need the part # PK12728.
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    There is an adapter for you that will allow the 7-way blade connector (sometimes called a 7-way flat) on your GMC truck to work with the 7-way round connector on your trailer. If you take a look at the accompanying photo, that's what your connectors should look like; if so you will simply need Adapter # F77R and you'll be set! I have added a link to a video review of this adapter for you to check out as well.
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  • 7 Way Flat to 7 Way Round Adapter Recommendation for Use In Norway
    I wish I had something direct that I could recommend for you, but honestly your best option would be to find a local vehicle-side trailer wiring connector, remove your current one and then wire it up to match the connector on the trailer you have. In the off chance that the 7-way rounds in Norway are the same as the style here in the US you could use a 7 Way RV-Style (Flat Pin) to 7 Way Round Pin # F77R. I attached a couple wiring diagrams that you can check out to see the
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  • Adapter From 4-Way Vehicle Side to 7-Way Trailer Side Connection
    The Tow Ready Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717 will connect to the vehicle side so the ground wire will need to be connected to your vehicle not the trailer. That ground wire is required for proper function of your adapter. The other wires if not used can be taped up and stored out of the way. I recommend using the mounting bracket # 18138 and the no drill # 18140 to secure this adapter. Since the trailer has a 7-way connection, it is very possible that...
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  • Adapter for 7-Way Round Pin on Trailer to 7-Way Blade on Ford F-150
    There are 7-Way blade style to 7-Way round pin adapters available that you can use such as # F77R. And if you want to change the trailers from round pin connectors to blade style you can use # PK12706. I have included a link to our article on various trailer connectors that has various diagrams that show the pin functions of connectors which will making replacing the existing connectors easier.
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    We do offer a watertight 7-way trailer connector setup with the EZ Connector Magnetic 7-Way Trailer Connectors w/ Watertight Seal # 319-R7-02 which installs in place of a standard trailer 7-way. I attached a review video for this for you to check out as well.
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  • Adapter Availability to Go from 7-Way Round to 7-Way Blade
    Sounds like you are either looking for the part # F77R which has a 7-way blade male and a 7-way female round connector or the part # PK12-724 which has 7-way round male and 7-way blade female.
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  • Trailer Wiring Extension for a Tall 2018 Ram 2500 Power Wagon Towing a Rental Trailer
    We do have various trailer wiring extensions you could use. If the rental trailer has a 7-Way blade style connector you could use an extension such as # C56080. Granted this one is 7 feet long but it costs less than shorter extensions and who knows when the additional length might come in handy. If the trailer takes a 4-Way you could use 12 inch extension # HM48145. Need more length? There is a 48 inch 4-Way extension too # HM47115.
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  • Can the Custer Trailer Connector Adapter # F77R be Used to Tow a 5th Wheel with a Kenworth Truck
    The Custer Trailer Connector Adapter # F77R is meant to go from a trailer with a 7-Pole Round connector to a 7-Way Blade connector. I believe that you need the exact opposite which can be found with the Pollak # PK12-724. You will need to take note to see if your 7-Way on your Kenworth has separate taillight wiring or not. If you test the pins on your 7-Way Round with a circuit tester # PTW2992 and find that the stop light signal has its own pin then you will need to splice in a converter...
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    An extension is going to be male on one side and female on the other. We have a 4 foot extension, part # TLW6042, that's a 7-way on each end. We don't carry an 8 foot long extension but we do have a 10 foot, part # TLW6510, that should work for you.
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    I have a solution for you but no ball mount is going to extend out that far and have anywhere near the 12,000 lbs to 15,000 lbs capacity you are needing. I recommend the Strait-Line Weight Distribution w/ Sway Control - No Shank - Trunnion Bar - 17K GTW, 1,700 lbs TW item # RP66075 with the Reese Weight Dist Shank - 12-1/4" Long - 2" Drop to 6-1/2" Rise item # RP54970. This system will give you a 15,000 lbs capacity and extend past your ToughCountry Deluxe Rear Bumper. For the ball there...
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  • Availability of 7-Way Round Pin Wiring Extension
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    I have a solution for you, but the Prodigy RF Brake controller part # TK94FR is not compatible with electric over hydraulic brakes. Instead I would recommend the Prodigy P2 Brake Controller part # 90885 as this controller is compatible with EOH brakes. The Demco Hydraulic Brake Line Kit # DM5425 would work fine with AL-Ko calipers. The Adapter part # F77R would work for converting the 7-way round he has on his trailer. A better solution would be to not use an adapter and match both the...
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Info for this part was:

Employee Dan D
Written by:
Dan D
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
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Employee Wilson B
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