1. Wiring
  2. Hopkins
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 7 Blade
  6. Plug and Lead
Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV

Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV

Item # HM47425
lowest price pledge
Retail:$43.78
Our Price: $35.50
You Save: 19%
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.87 lbs
Quantity: 
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Videos

This adapter plugs quickly and easily into your 7-way, round-pin, vehicle-end connector to convert it for use with a 7-way, blade-style, trailer-end connector. Flexible wire between plugs provides a wide range of motion to ease installation. Lowest Prices for the best wiring from Hopkins. Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV part number HM47425 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (32)
  • Q & A (25)
  • Photos
  • Why etrailer?

Hopkins Wiring - HM47425

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • Plug and Lead
  • 7 Round
  • Hopkins

This adapter plugs quickly and easily into your 7-way, round-pin, vehicle-end connector to convert it for use with a 7-way, blade-style, trailer-end connector. Flexible wire between plugs provides a wide range of motion to ease installation.


Features:

  • Adapter converts your 7-pole, round-pin, vehicle-end connector to a 7-pole, RV-style connector
  • Flexible wire between plugs provides extra reach and wide range of motion
    • Increases installation options
  • Convoluted tubing (wire loom) protects wires from the elements
  • Easy-grip design makes installing and removing the 7-pole, round-pin plug effortless
  • Built-in cover and mounting bracket included on 7-way RV plug
  • 90-Day limited warranty


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


7-Way, Round-Pin, Vehicle-End Connector7-Way, RV-Style, Trailer-End Connector

47425 Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV




California residents: click here



Customer Reviews

Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV - HM47425

Average Customer Rating:  4.9 out of 5 stars   (32 Customer Reviews)

This adapter plugs quickly and easily into your 7-way, round-pin, vehicle-end connector to convert it for use with a 7-way, blade-style, trailer-end connector. Flexible wire between plugs provides a wide range of motion to ease installation.

- HM47425
by:

The product is excellent. I will be using this website again. Sorry for the delay on my response. 208736



- HM47425
by:

Perfect.... Exactly what I needed to hook up my fifth wheel camper to semi!!! Thanks 549771



- HM47425
by:

Not a lot to say on this item, pretty simple, and it would be hard to mess up. Plus we wound up cutting our in two and just using the individual pieces on two different cords. :-) 796661



- HM47425
by:

Used this to hook up from a box truck rigged with a 7 round pin to 7 blade on a cargo trailer. Everything fit great and worked correctly. No issues with the electric brakes. 738445



- HM47425
by:

Product arrived as expected and is the correct part as needed. The additional pictures of the product helped identify this part would fit my requirements. 718104



- HM47425
by:

works as advertised and delivery was pr ompt 706501



- HM47425
by:

Product was exactly what I needed!! Great plug in no re wireing needed thanks!! 696264



- HM47425
by:

The wiring plug in for my tractor to trailer works great! Etrailer did a great job helping me pick the correct wiring plug! 679599



- HM47425
by:

Great product and shipped very fast. I will definitely be shopping again! 657352



- HM47425
by:

Works great 655523


Comments
Best ever
Robert H - 06/09/2020

79258

- HM47425
by:

Exactly what I was looking for fit perfect work well 634016



- HM47425
by:

Fast, easy service. 608062



- HM47425
by:

Received the package in a timely manner and was everything I expected. Would recommend this to anyone. 575212



- HM47425
by:

Perfect. Exactly what we needed. Thank you 565949



- HM47425
by:

I haven't used it yet but I know it's exactly what I need, arrived sooner than I thought, company kept me well informed and I WILL use them again if the need arises which I'm sure it will 560808



- HM47425
by:

Works great 548051



- HM47425
by:

I looked all over for this adapter at seven stores and everyone told me that they don't make this adapter, I have to change my trailer plug. I looked it up on the net and you have it and I ordered it and had it in three days and it is just what I needed. They do make it, but venders don't want to stock it. after I received it I found one at NAPA for ten dollars more then I paid for it here, Thank you, Gary 518759



- HM47425
by:

Well made is all I can say about this adapter only because I used it once it worked out great but have not had a need to use it again. I keep it with my other towing plug adapters as I'm sure I will need to use it again someday! 430394


Comments
After a year of using the adapter plug it has worked flawlessly Everytime Never had any issues with it not working the way it was supposed to Im very satisfied with this product and would recommend it to others
Rod H - 09/15/2018

43638

- HM47425
by:

Works well, converting from one type plug to the other in our fleet saves time from having to rewire all trucks/trailers 413153



- HM47425
by:

Correct product for a fair price. 366689



- HM47425
by:

Worked great. Got it quickly. 333827



- HM47425
by:

I was surprised at the quality of material and it fit and worked great. 301351



- HM47425
by:

I have ordered from e trailer several times. Now that I have 4 trailers I will probably be ordering more parts. They ship quickly and send you updates on you order. the products are top quality. Thanks etrailer. 297945



- HM47425
by:

Great product works well. 291384



- HM47425
by:

We have an 2000 Newell Coach with the round 7 pin receptacle With this adapter all of our other adapters will fit our trucks, trailers, as well as the Newell. Thanks for the quick shipping and great product Ricky Z 231580


25
32
Show More Reviews

Ask the Experts about this Hopkins Wiring

  • How to Make 7-Way Blade to 7-Way Round Adapter for Tractor Trailer to Use Curt Echo
    Your heavy duty style 7-way is different than the 7-ways we normally see for two reasons. One reason is that the stop lights and the turn signals are on different circuits and because the 7-way uses round pins instead of flat blade style connectors. On the chart that you attached you don't have a dedicated brake output signal (probably because your vehicle normally tows air brake trailers) but you do have an extra NA circuit that you could use a brake controller with. To use the Curt...
    view full answer...
  • Solution for Freightliner to Tow Trailer with 7-Way Blade Connector
    Our 7-way round to 7-way blade adapters do not have a signal converter built into them so you'd have to use a converter box like the # RM-732 to get the signal combined like your trailers need. Now what I would recommend is install a 7-way blade on your Freightliner with the harness part # PK11998 and the socket part # PK11893 ran to your current wiring but installing the # RM-732 between the new and old 7-way.
    view full answer...
  • Adapter Recommendation for Going from 7-Way Round to Flat
    There is no taillight converter installed in the Adapter part # HM47425 that you referenced so if you need to go from separate to combined lights then this kit is not for you. You will need to add a converter, like the Tow Ready, # 119130. Just cut off the 4 way end and wire it into this adapter. I have attached a picture which illustrates this.
    view full answer...
  • 7-Pole Agricultural to 7-Blade RV Trailer Connector Adapter
    Yes, the male 7-pole connector on the Hopkins Trailer Connector Adapter part # HM47425 is commonly found in agricultural applications. The female version of this connector is likely what is on your tractor now. This adapter will allow you to pull your utility trailer with your tractor assuming both the vehicle side and trailer side connectors match the attached photo. I have also attached a review video of the adapter for you as well.
    view full answer...
  • Brake Controller Does Not Work when Using 7-Pole Round to 7-Pole Blade Adapter
    It does sound like something is mismatched in the wiring. Either the truck or the trailer would appear to not be following the standard pin out. On the output side of adapter # HM47425 the brake pin is in the 5 oclock position if looking at the pins. If looking at the back of it where the wires attach it would be in the 7 oclock position. I have included a link to a help article that shows how different trailer connectors are normally pinned out so you can compare them with what you...
    view full answer...
  • Adapter to Connect a Round 7-Way Trailer Connector on a Semi to a Gooseneck Trailer with a 7-Blade
    Use Hopkins part # HM47425. It's an adapter that plugs in to your round 7-way and gives you a 7-blade RV style connector.
    view full answer...
  • Wiring for 7-Pin Round to 7-Blade Adapter
    There is not a wiring diagram for the Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV # HM47425 but I have added a photo showing the functions of a 7-pin round and 7-way RV blade style, which is what this adapter was intended for. The wires will match the functions shown without any type of re-wiring needed. The only thing you need to be sure of is that you have the same 7-way connectors, and if you do it is assured this adapter will work. I have added a link to a video...
    view full answer...
  • Can the Hopkins # HM47425 and Bargman # 50-67-210 be Used to Replace Adapter Cable
    Although we do not carry that exact cable, as you mentioned, the parts that you mentioned would be a great way to replace your cable. The Hopkins Trailer Connector Adapter # HM47425 would change the 7-Way round connection on your truck to a 7-Way blade style. You can then use the Bargman 7-Way Molded Trailer Wire Connector # 50-67-210 to connect the Hopkins adapter to your trailer. Since both ends will be the female, or plug, ends then this combination will work.
    view full answer...
  • Troubleshooting No Trailer Power or Running Lights with Hopkins 7 Round to 7 Blade RV Adapter
    It sound like some of the functions on your trailer wiring are not connected in the standard pin locations which is what both Pollak and Hopkins use. On your trailer, locate the wires and pin location by function only as color coding is not standard across all manufacturers. Start by testing the 11:00 and 1:00 pin positions on your trailer with a circuit tester like # PTW2979; this is most likely where your wires are crossed. There could also be a short between these two circuits since...
    view full answer...
  • Using an Adapter to Connect a 7-Round to a 7-Flat RV Connector
    Sounds like the adapter you have is not the correct adapter for the OEM truck plug. The 7-round to 7-flat trailer wiring adapters, like the Hopkins # HM47425, are wired to convert the typical 7-round wiring to the RV style 7-way with the flat pins. If your trucks plug wiring configuration is not wired like the standard 7-round, then when hooking the adapter up to your RV plug will cause the type of malfunction that that you are seeing. I have attached a picture that shows what the...
    view full answer...
  • How to Adapt 7-way Round Pin Trailer Connector on Kenworth Tractor to RV Blade Style 7-Way
    There isn't an off-the-shelf adapter that'll do exactly what you're wanting to do, but you can certainly piece one together. Your best bet would be to install a taillight converter and a 7-way RV blade-style trailer connector on the Kenworth tractor. This way, you'd have 2 functioning trailer connectors. I'd recommend using the # 119190KIT taillight converter which would tap into the circuits feeding your tractor trailer 7-pin round plug. The yellow wire taps into the feed for the left...
    view full answer...
  • Are Hopkins and Pollak 7-Way Round Pin to 7-Way Blade Trailer Connector Adapters the Same
    Hopkins Trailer Connector Adapter # HM47425 and Pollak Trailer Connector Adapter # PK12-724 are both 7-Way round pin to 7-Way blade style adapters. Both plug into a tow vehicle that has a 7-Way round pin connector so you can tow a trailer that has a 7-Way blade style connector. They are just from different manufacturers.
    view full answer...
  • Replacement 7-Way Round Pin Connector for a STEELBRO Side Loader
    We may have a 7-Way round pin connector for your Steelbro side loader unless it has the same functions as a semi-truck/trailer 7-Way. If that is the case we will not have a replacement. But for a 7-Way round pin vehicle side we have # PK11720 or # PK11-729. And for a trailer side we have # PK11700 or # PK11702. I have linked our help article on trailer wiring that shows how the various connector types are pinned out.
    view full answer...
  • 7-Way Blade to 7-Way Round Adapter Recommendation
    It sounds like you need a 7-way adapter. If the pins on the 7-way of your truck are blades and the pins on your trailer are round pins then you would need the # 47595. If the setup is the opposite of that you would need the part # HM47425 that you referenced.
    view full answer...
  • Trailer Connector Adapter for 7-way Round Pin to 7-way Blade Connector on Dump Trailer
    The Hopkins Trailer Connector Adapter you've looked at, part # HM47425 will adapt the existing 7-way round pin the tow vehicle to the 7-way RV blade style connector on your dump trailer. You can see a product demonstration video by clicking the provided link.
    view full answer...
  • Recommended Brake Controller and Wiring for a Semi Trailer
    The Hayes Air Actuated Trailer Brake Controller part # HA100400C and the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885 will both work on your semi, they just operate in different ways. The Hayes controller will apply force to the trailer brakes relative to the how hard the brakes in the tow vehicle are depressed whereas the Prodigy P2 will apply force to the trailer brakes relative to the deceleration of the tow vehicle. I recommend using the Tekonsha Prodigy P2 because it is...
    view full answer...
  • Adapter Solution to Convert Gooseneck Trailer to Fifth Wheel King Pin
    We have gooseneck trailer to fifth wheel king pin adapters that would work great on your trailer but it really depends on what type of gooseneck trailer you have now. For example if you have a square tube gooseneck you could use the part # BD028965030 or for a round tube part # PKG5-R25-IP. Or you could replace the outer tube as well and use the Bulldog # BD0289590300. For an air to electric brake controller the Hayes part # HA100400C is the kit you want. This ties into the air brake...
    view full answer...
  • Wiring Adapter for a 1997 Land Rover Discovery with 7-Way Round Pins
    Trailer Connector Adapter # 118710 is an odd duck but not as odd as what you have on your 1997 Land Rover Discovery! Actually, it isn't that odd. It is a 7-Way round pin but I wasn't expecting it to be on that particular vehicle. The design of it though is unique. First, make sure it is active by testing those pins using a circuit tester such as # 40376 or a meter if you have one. If you have power with the various vehicle lights on then you will need adapter # PK12742 to go from a 7-Pole...
    view full answer...
  • Adapter Recommendation for Going From 7-Way Round to 7-Way Blade
    We have two adapters to go from a 7-Way round pin on a tow vehicle to a 7-Way blade style on a trailer. You could use either # PK12-724 or # HM47425. Either would work well for you if your tractor has trailer wiring setup for combined turn signals where the blinkers and stoplights are on the same circuit. If they are separate then you would need to install a second 7-way blade as that would be the easiest way. For that you would need a 7-way like part # 37185 and a signal converter like...
    view full answer...
  • 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 part # PK12-724 or # 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...
    view full answer...
  • Recommended Trailer Wiring For 2007 Chevy Silverado 2500 HD
    It sounds like you need vehicle side connection using the Replacement 7-Way Connector # 74682. This will give you the blade style connection to match your trailer wiring. If you need the 7-blade to 7-pin adapter, I recommend the Pollak Trailer Connector Adapter - 7-Blade Plug to 7-Pole Round Pin - Nylon # PK12727. If you need to go from pin to blade, you can use # PK12-724 or # HM47425. There is one other style that is a fit for your truck, but it is not very common. If you are looking...
    view full answer...
  • Comparing Pollak and Hopkins 7-Way Round Pin to 7-Way Blade Style Adapters
    Both adapter # PK12-724 and # HM47425 plug into a 7-Way with round pins and provide a 7-Way blade style connector. They are made by different manufacturers but accomplish the same task. Pollak adapter # PK12-724 has a 1 year warranty whereas Hopkins adapter # HM47425 has a 90 day warranty.
    view full answer...
  • Trailer Wiring Adapter to Join 7-Way Round Pin to 7-Way RV-Style Blade Connector
    We do offer various trailer wiring adapters to allow connecting a vehicle and trailer that use different connector types and all such adapters can be see on the linked page. For an adapter to join a round-pin 7-way on the vehicle to a 7-way blade (RV style) on the trailer you can use Pollak part # PK12-724, or Hopkins # HM47425. Note that it is possible that the trailer may have a different wiring configuration than the vehicle and adapter. For the long term, if this same trailer is...
    view full answer...
  • 7-Way Round Pin to 7-Way Blade Style Adapter
    We have two adapters to go from a 7-Way round pin on a tow vehicle to a 7-Way blade style on a trailer. You could use either # PK12-724 or # HM47425. But the length is not close to 4 or 5 feet. What you could do is make an adapter. You would need 3 main parts: 7-Way round trailer side, # PK11702, 7-Way blade vehicle end, # PK12-707E, and 4 or 5 feet of jacketed 7-Wire, # DW04914-1. Just change the quantity on the wire page to the amount of feet you want.
    view full answer...
  • Remote Operated Brake Controller for Gooseneck Trailer with Electric Over Hydraulic Brakes
    We do not offer a remote brake controller option that will work with the Carlisle HydraStar disc brake actuator you referenced. The most cost-effective option would be to bite the bullet and temporarily install a brake controller in the rental truck that is compatible with electric/hydraulic brakes like the Tekonsha Prodigy P2, part # 90885. This would involve some wiring, such as tapping into the brake light circuits, and running a power and ground wire to the battery. You would...
    view full answer...




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Written by:
Tyler C
Updated by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.