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Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat

Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat

Item # HM47065
Our Price: $37.07
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Trailer Wiring
Shipping Weight: 0.91 lbs
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This heavy-duty, coiled cable adapter is compatible with a 7-way RV blade trailer socket on the vehicle and adapts it to work with a 4-wire flat connector on the trailer. Great Prices for the best trailer wiring from Hopkins. Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat part number HM47065 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (163)
  • Q & A (0)
  • Videos (2)
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Hopkins Trailer Wiring - HM47065

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

This heavy-duty, coiled cable adapter is compatible with a 7-way RV blade trailer socket on the vehicle and adapts it to work with a 4-wire flat connector on the trailer.


  • Heavy-duty, coiled cable
    • Weatherproof jacketing
  • Easy-grip connectors
  • Tin-plated terminals for corrosion resistance


  • 3' Cable when stretched
  • 7-Way RV blade to 4-wire flat

Flex Coil Adapters provide increased durability and the additional length that may be necessary to reach between the tow vehicle's socket and the trailer/towed vehicle's plug.

47065 Hopkins Trailer Connector Coiled Adapter, 7-Way to 4-Way

California residents: click here

Video of Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat

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

Video Transcript for Hopkins 7-Way to 4-Wire Flat Heavy-Duty Trailer Coiled Wire Adapter Review

Hey everybody, Ryan here at etrailer. Today we're gonna be checking out the Hopkins trailer wiring adapter. So this is gonna let you go from a seven-way round type connector to a four-way flat type connector. What this is gonna do is really simple. It's gonna let you plug into your vehicle's seven-way round type connector and bring it down to a four-way flat. So the signals that it's gonna send back to your trailer will be your taillights, your brake lights, and your turn signals.

Now there's a ton of different adapters like this, or similar to this, available and you know, what this one will work good for is just about any situation really, but I could see it really becoming useful for those of you that tow multiple different trailers, you're not real sure what trailer you're gonna be pulling type deal. If your trailer wiring's kind of short, maybe you have a a real long ball mount or if your seven-way's in a kind of a funny spot like our 4Runner here today. So believe it or not, the seven-way is all the way kind of buried way over here on the driver's side. And even with this trailer's wiring, like, that's a pretty good length. You know, that's not short by any means.

There's no way that would even come close to being able to plug in. So by utilizing our adapter, I'll be able to, maybe, if I get to it here, plug it in, that'll give us all that extra length we need and then some, honestly. So I might be able to just kind of drape this over and allow you to make that connection and not have to worry about it coming disconnected when you make those turns and stuff, too. Since this is coiled, it'll stretch out when you make the turns or if you need that length and kind of gives you the freedom to kind of set things up how you want to. If you we're to stretch this cord out completely, the length that it's gonna give you is three feet.

So that should be more than enough for just about any situation you might find yourself in. If you don't think you're gonna need any additional length like this and you're looking for something a little bit different, what I would suggest is a real simple adapter like this. This is a seven-way, and then on the back there's just a four-way that'll allow you to plug in there. So that's always an option for you as well. And there's different variations to this as well.

So we just did one of these. It's a seven- to five-way flat type connector on this end. So if you got a a five-way type flat connector on your trailer, you can always check that out and that'll allow you to hook everything up and get it going. As far as the quality of this, I'm not gonna lie, I'm usually not super crazy about Hopkins stuff but like I said, I've been doing several of these wiring adapters and I actually like 'em, I think they're well built. The wires feel thick, you know, it has a good coating on it that's, you know, not super stiff but not super loose, so it'll stretch out when you need it to and whatnot. But more importantly, the connectors are really nice. They're not that brittle plastic like you'd usually see. They're almost a, almost like a hard rubber, I guess, if that makes sense. And what I like about 'em too is everything is sealed up up nice, for the most part. Like on some of the cheaper ones you'll see the wires kind of come in and it's just kind of cinched down. That's not the case with these. It's all molded almost, I guess you could say. And I like how on the ends they're somewhat reinforced, you know, like drops back some. 'Cause a lot of times it'll happen over years, you know, without this here there's no support there. Then the wires end up getting kind of tossed around like that and cause some connection issues, so this should hold up for some time. I like the thickness on the four-way side too. It gives you a good, you know, spot to actually grip and get it plugged in. So pretty impressed with it, actually, should definitely hold up. Gives you a little dust cover, too. So really no reason that this should give you any issues for quite some time. Other than that, at the end of the day, you know, there's really not a whole lot to it. Pretty simple part, but can be a great solution for a lot of people who are needing to get their four-way trailer hooked up to their vehicle that has a seven-way round style trailer connector. And that'll finish up our look at of the Hopkins seven to four-way trailer wiring adapter.

Customer Satisfaction Score:

Customer Reviews

Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat - HM47065

Average Customer Rating:  4.8 out of 5 stars   (163 Customer Reviews)

This heavy-duty, coiled cable adapter is compatible with a 7-way RV blade trailer socket on the vehicle and adapts it to work with a 4-wire flat connector on the trailer.


Needed a longer connector for my vehicles. Both have 7 way plugs, but I use a trailer with a 4 flat plug. The coiled adapter works great for both of the vehicles. Very good product if you need some extra length and the fact that it has the coils makes for a better appearance.


Item was just as I anticipated. It looks good, works great, and the delivery was as promised. E Trailer is a good place to do business.

Neal W.


Works as well as the day I bought it. No complaints. A great product.


Excellent quality and very sturdy const ruction.


Will work great around the water. Always backing the trailer to the river with multiple turns and have enough stretch to stay connected!


I needed a trailer lite adapter for my 4Runner to my boat trailer. This adapter was just what I needed and it worked great, just as expected. It's also high quality and reasonably priced. Keep up the great work etrailer.



Still works great, I also use it when I tow my utility trailer.


Very well put together robust at both ends easy to attach at either connection not flimsy at all.


Heavy duty works great


haven't hook it up yet. Looks like this solves the extra wire cable to light up the cargo carrier. No more wire cable hitting the road surface and no more cable wrappings around the long trailer hitch.


Good quality product


Bridges the gap nicely between the utility and small boat trailers I use and the offset light socket on my 2009 4Runner. Really heavy construction; it feels like it'll last a long, long time.


Useless- how many towed vehicles are within the three foot length of this cable? Do not order this with the wiring kit for your towed vehicle that lets you use the vehicles tail lights instead of the magnetic lights. The tow bar between your motorhome and the "toad" is around 4' long. I'm not sure what this can be used for.


Could be a little longer but other wise great


The tow-harness and components appears quite well made. Fit was perfect, installation was easy, and tested and worked the first time. The instructions, however, may have been more specific to earlier Pilots, thus were not entireley clear and caused some delay in installation.


i like it coils back up


I’m using this adapter between my Audi Q5 and my lightweight boat trailer. I tried it yesterday and it works fine. Looks to be a well made product and should be durable - time will tell!


Perfect for your new SUV with a 7 pin electrical connector, so you can connect to that 4 pin trailer.


Very durable and weather resistant.


I have yet to make a connection from truck to trailer harness, however I anticipate functionality since the HM47065 Adapter is very well constructed. Thank you


Haven't got to use adapter very impressed with the construction of this product, will be perfect for what the use will be. Have a newer and larger truck my trailer connections are too short with out the wire adapter.


This is just what I was looking for. It works perfect for my trailer and car carrier. It's heavy duty. The shipping was fast. I looked at other ones,but none as good as this for the price.I will buy from trailer again.


Products were delivered with very short wait time.

Adapter cable HM47065 is a replacement of the original cable purchased for towing in 2012.

Socket HM48480 is a replacement of the socket that was on the motor home when purchased used in 2012.

They haven't been installed yet, but I don't expect any issues.



Product worked as described and is well made. Like the coils as this prevents the wire harness from dragging on the ground while allowing harness to stretch during turns.


This was a prompt and satisfactory transaction with delivery in three days. The merchandise is a quality trailer light connector. I highly recommend for anyone needing trailer accessories.


This was perfect for me!


Product is well built and of quality construction. Shipping w as fast and efficient. I am very pleased with the trailer hookup and

Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • Should All Brake Assemblies be Bled if Only One Isn't Activating
    I would first try bleeding the one assembly that is not braking at this time and if that seems like it fixes the problem you could leave it at that but if not then you'd want to bleed all of the assemblies.
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  • Will Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat Fit 2015 Jeep Cherokee
    If your 2015 Jeep Cherokee Trailhawk has a 7-Way trailer connector on it then yes, the Hopkins Heavy-Duty Trailer Coiled Wire Adapter # HM47065 will plug right in and provide some extension and a 4-Way flat to plug in a trailer. I have linked a video review of this adapter for you. We have a lot of 7- to 4-Way adapters. Some have an extension and some do not. I have included a link to the options for you.
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  • Will Hopkins Heavy-Duty Trailer 7-Way to 4-Wire Adapter # HM47065 Activate Brakes on Trailer
    The Hopkins Heavy-Duty Trailer 7-Way to 4-Wire Adapter # HM47065 is intended to plug in to a tow vehicle 7-way socket, take its lighting signals only (not a brake signal or 12V power) and route them to the 4-pole flat connector. When an adapter reduces the number of wires it also reduces the number of electrical circuits and therefore the number of functions. A trailer with electric brakes will need to have at least a 5-pole wiring harness (one more wire to provide one more function) as...
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  • Flat Towing a Vehicle with a 4-Way Connector for Lighting Using 7-Way Trailer Connector on RV
    If your vehicle being flat towed is wired with a 4-way to power its lights from the RV with a 7-way trailer connector you can use the Hopkins Coiled Wire # HM47065.
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  • Tow Bar Wiring Recommendation for 2001 Ford Ranger
    For tow bar lighting for your 2001 Ford Ranger you would want the Hopkins Kit part # HM56004 which is a custom fit setup for your vehicle. The connectors plug inline with the taillight connectors on your truck and allows your RV to control them. If your tow vehicle has a 7-way you would want the part # HM47065 to use as an umbilical adapter to span distance between RV and Ranger.
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  • Replacement 7-Way Trailer Connector for 2011 GMC Yukon
    That's actually a 7-way you sent in a picture of as the center pin counts as the 7th one. So what you'd need for a replacement is the part # HM40920 which is the same style of twist lock 7-way and also comes with a 4-way as a bonus.
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  • Connecting 4-Way Flat on Jeep to 7-Way on Camper
    I do have a solution for you, however the Hopkins Heavy-Duty Trailer Coiled Wire Adapter # HM47065 won't work to connect the 4-Way flat on your Jeep to the 7-Way on your new camper. This is because the 4-Way on your Jeep will be the female end of the connector, which is identical to the 4-Way on this adapter. The male end will be on the trailer side. This just means the adapter won't physically plug into your setup because they are matching, instead of corresponding/compatible, plugs. To...
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  • 7-Way to 4-Wire Adapter Cord With 8' of Length
    Yes, as the Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat part # HM47065 is only 3' long, you will want to use the Wesbar Coiled Adapter 7-Way RV to 4-Way or 5-Way flat part # 787196 as this cord is 8' long. Both coiled adapters offer a 7 to 4-way conversion. I have included a video review of this product for you.
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  • Adapter For 4-Way Flat Connection On Vehicle To Use Trailer 5-Way Flat Connetor
    It sounds like you are needing the Adapter 4-Pole to 5-Pole Trailer Wiring Adapter # 47515 to connect from a 4-way flat connector on your vehicle to a trailer with a 5-way flat connector.
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  • Brake Lights Not Working When 2013 Audi Q7 is Hooked up to Boat Trailer
    On the trailer side of wiring the stop signal is connected to both the left and right turn signals. Because your turn signals are working I don't believe that the problem is the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover # 47345. The problem is most likely that the trailer has a bad ground or the harness is being overloaded when you connect your trailer to your 2013 Audi Q7. The only way that the connector would be the issue is if it was damage in some way or if the connectors...
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  • Is There a Different Sized Plug Version of the Hopkins HM47025?
    The simple answer to this is going to be no, because trailer connections adhere to an industry standard in order to ensure compatibility between different manufacturers and for end user convenience. Trailer connector adapters like the current # HM47025 will be the same size as something like the Hopkins # HM47065 -they are all going to have the same dimensions assuming they're the same type of connections (7 flat, 4 or 5 blade, etc.). For these reasons, the 7 way end on the any adapter...
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  • 7-Way To 4-Way Adapter Recommendation For 2003 Hummer H2 Towing A Rented Trailer
    Since the owner's manual on your 2003 Hummer H2 states it has a universal 7-way connector on the back, we have an adapter that will work fine for you. I recommend the Hopkins Heavy-Duty, Coiled Trailer Connector Adapter, part # HM47075. This connects to the 7-way on your Hummer and gives you a 4-way connector to connect the trailer to. As long as the 4-way connector on the trailer you are renting has the standard 4-way flat connector attached, using the # HM47075 should take care of your...
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  • 7-Way Recommendation to Replace 4-Way on a Trailer
    Sounds like you have a trailer that currently has a 4-way and a tow vehicle that has a 7-way. Based on what you said you are looking for the part # PK12706 would be what you would need. I attached a help article on trailer wiring for you to check out as well.
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  • Available 7-Way to 4-Pole Trailer Wiring Adapters
    We do offer trailer wiring adapters that can allow connecting different wiring formats such as a 4-pole and a 7-way. But as you noted, if you convert 7-way vehicle wiring down to 4-pole trailer wiring you do naturally lose 3 circuits: 12V auxiliary power, reverse lights and trailer brake power. All such adapters are shown on the linked page. I suggest using a cable type adapter like # HM47065 since it provides strain-relief, unlike the solid adapters such as # PK12716.
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  • Is Hopkins # HM47065 7-Way to 4-Pole Adapter Compatible with 2015 Toyota Tacoma
    The Hopkins # HM47065 is not a vehicle specific item, it will work in the 7-way of any vehicle and allow a trailer or flat towed vehicle with a 4-pole flat connector to receive lighting signals from the tow vehicle. The # HM47065 would typically be used for flat towing a vehicle, while an adapter like part # PK12716 would usually be used for a trailer. If you'd care to see a product description video featuring the Hopkins Adapter, please click the provided link.
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  • 7-Way to 4-Way Adapter for a 2016 Honda Pilot with Factory 7-Way Trailer Connector
    You could use 7- to 4-Way adapter # HM47065 if you need the extra 3 feet of length the coiled cable provides. If you do not need the extra length you could use adapter # PK12716 and the trailer's 4-Way would plug into the back of it (which would be plugged into the 7-Way). I have linked video reviews of both adapters for you.
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  • 7-Way to 4-Way Adapter Recommendation
    I have a better solution for you, but technically the part # HM47065 that you referenced would work go from a 7-way to a 4-way connector. What would be a better solution would be the part # PK12716. This will plug right into your 7-way and will allow you to connect your 4-way to it.
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  • Changing a 7-Way to a 7-Way and 4-Pole Connector on a 2014 Toyota Tacoma
    I do have a solution for you, but there are no adapters that plug into a 7-Way and then have 7-Way and 4-Pole connector plugs. You can do 1 of 2 things. You can either use an adapter like the Hopkins # HM47065 or you can change out the 7-Way connector on your 2014 Toyota Tacoma for the Hopkins # HM48470 which will give you both the 7-Way and 4-Pole connectors. I recommend going with the 2nd choice (part # HM48470) since it is a permanent solution that will accommodate both trailers and...
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    Image 1 for
  • Are RV 7-Way to 4-Pole Wiring Adaptors Vehicle-Specific
    Trailer wiring adapters like Hopkins # HM47065, Pollak # PK12716 and Hopkins # HM47365 are not vehicle-specific products. They will work on any vehicle that has the appropriate connector. The coiled wire adapter # HM47065 that you referenced combines a trailer-side (male) 7-way RV-style plug (that mates with the 7-way socket on your Ram 3500) with a vehicle-side 4-pole flat type plug. This wiring adapter carries only lighting signals (stop, turn and tail) but not other functions like auxiliary...
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  • 7-Way to 4-Pole Tow Bar Wiring Adapter Needed to Connect RV to Vehicle
    The adapter needed will depend on which 4-pole connector is used on the vehicle. For a 7-way to 4-pole flat connector, use part # HM47065. If the 4-pole connector has the round plug, use the 7-way to 4-pole round adapter, part # HM47043.
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  • Recommended 7-Way to 5-Way or 4-Way Flat Adapter That Measures 3-Ft Long
    For a 7-Way to 5-Way or 4-Way Flat connector I recommend part # HM47075. This adapter will work with a 4-way or a 5-way and has Nite-Glow which lets you know you are connected and working. This has a coiled cable which measures 3-ft when stretched.
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  • Coiled 7-Way to 4-Way Recommendation for Towed Vehicle
    Yes, we have the Wesbar # 787196 which is an 8 foot long 7-way to 5-way. I know you need a 4-way but this will work well as the fifth circuit would just not be used.
    view full answer...
    Image 1 for
  • Best 7-Way to 4-Way Adapter for Salt Water
    For a 7-way to 4-way adapter I recommend the Pollak 7 Pole to 4 Way Connector Adapter # PK12716. This adapter has a non-corrosive nylon shell so salt water would not be a concern. If you need an adapter that is more than just a plug and has some extra cable, I recommend the Hopkins Heavy-Duty Trailer Coiled Wire Adapter # HM47065. This adapter has a heavy-duty coiled cable with weatherproof jacketing that stretches up to 5' in length. It also has tin-plated terminals for corrosion resistance....
    view full answer...
  • Adapter for 7-Way or 6-Way to Plug Into 4-Way on Vehicle Being Flat Towed
    I'm sure we have what you need but I'm not certain exactly what trailer connector you have on your Bobtail truck. It looks like there are a number of potential options for the type of connector you might have, so what I can do is give you the options for an adapter so you can choose the right one. - 6-Way Round: Hopkins Endurance Flex Trailer Connector Adapter - 6-Pole to 4-Pole # HM47320 - 7-Blade: Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat # HM47065 - 7-Round:...
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