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

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Hopkins Wiring Adapters - HM47425
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  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • 7 Round
  • Plug and Lead
  • 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. 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 (27)
  • Q & A (21)
  • Videos (1)
  • Photos
  • Why etrailer?

Hopkins Wiring - HM47425

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


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


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Hopkins Wiring - Wiring Adapters - HM47425 Review

Today, we're going to review part number HM47425. This is the Hopkins 7-pole round to 7-pole RV blade trailer connector adapter. This adapter will convert your 7-pole round pin vehicle end connector and make it into a 7-pole RV blade connector. The RV blade is much more popular. It is a flexible wire between the plugs, which provides extra reach and wide range of motions and increases the installation options. The wire loom over here protects the wires from the elements. You notice on the 7-pole round side, it does have a nice easy grip design, which makes installing and removing the plug very easy.

On the 7-pole blade design, it does have a nice built in cover, spring-loaded cover, which is included and will help protect the terminals from the elements. To give you an idea of the length on this, from one end of the connector to the other, you're looking at roughly about 12" in length. See if we can get a better view of it. There we go. About 12" long. That should do it for the review on part number HM47425. This is the Hopkins 7-pole round to the 7-pole RV blade trailer connector adapter.

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Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (27 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:

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:

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



- 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:

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



- 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:

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



- HM47425
by:

So far it seems like its gonna work great and shipping was fast 201019



- HM47425
by:

The trailer adapter is exactly what I needed. Thanks for all the help 194805



- HM47425
by:

Perfect 188037



- HM47425
by:

Great product simple excellent shipping. 139151



- HM47425
by:

Everything was great! 106400



- HM47425
by:

Extremely fast shipping and the item is heavy duty and was exactly what I was looking for. thank you so much for great cheap fast shipping 95779



- HM47425
by:

Adapter is just what I need to connect my gooseneck trailer (12V) to my military M931 tractor (24V) that has a step down converter box to accommodate the military 24V cable to the usual 12V tractor cable - this then allows the gooseneck connector to function. Appears to be well made and fits perfectly on both ends. It was shipped promptly. In fact, locating the NUMBER to search for the adapter was the hardest part - once I had that going to etrailer and putting in the number it popped right up, and the pictures helped assure me it was correct for my application. My other option of 24V magnetic lights on the trailer has been retired! 68829


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Ask the Experts about this Hopkins Wiring

Do you have a question about this Wiring?


  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

  • 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...


Do you have a question about this Wiring?




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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael L
Written by:
Tyler C
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Alexander C

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