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Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow

Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow

Item # HM47025
Our Price: $43.68
You Save: 25%
Trailer Wiring
Shipping Weight: 1.08 lbs
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This heavy-duty, coiled cable adapter is compatible with 7 RV blade to 5-wire flat connectors. Trailer connectors on adapter light-up to aid with the hook-up. Great Prices for the best trailer wiring from Hopkins. Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow part number HM47025 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (52)
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Hopkins Trailer Wiring - HM47025

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

This heavy-duty, coiled cable adapter is compatible with 7 RV blade to 5-wire flat connectors. Trailer connectors on adapter light-up to aid with the hook-up.


  • Heavy-duty, coiled cable
    • Weatherproof jacketing
  • Easy-grip, translucent Nite Glow connectors
    • Light up when connected to confirm continuity
    • Assist with hookup in the dark
  • Tin-plated terminals for corrosion resistance


  • 3' Cable when stretched
  • 7-Way RV blade (on vehicle) to 5-way flat (on trailer) connector
    • Carries the brake, turns, tail, reverse and ground functions from the vehicle

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.

In addition, Flex-Coil Adapters with Nite Glow illuminate on activation of the tail light function. This enables the user to find the electrical connection in the dark and shows that the vehicle's trailer wiring system is working properly.

47025 Hopkins Trailer Connector Coiled Adapter with Nite-Glow, 7-Way to 5-Way and 4-Way Flat

Customer Satisfaction Score:

Customer Reviews

Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow - HM47025

Average Customer Rating:  4.8 out of 5 stars   (52 Customer Reviews)

This heavy-duty, coiled cable adapter is compatible with 7 RV blade to 5-wire flat connectors. Trailer connectors on adapter light-up to aid with the hook-up.


Still works great. The light up feature is great for knowing if a lighting problem is the vehicle or trailer.


Just bought a longer ball mount to pull my boat, and needed a longer trailer wire
This should do the job.


The yellow wire coating is cracking and flaking off.


The adapter works great. Actually, this was the exact replacement my trailer originally had. I tried one other adapter, not same brand and it didn't connect securely, not allowing a good connection.


I used this for both a boat trailer and my garden trailer. Each trailer has different length cords for lights and this works great to not only reach, but also keep the longer cord from dragging low. Connects to my VW Touareg's output adapter without issue. Stores easily and the glow feature is a plus when hooking things up at night.


Great item, I first had the four pin model which is also great. Had to get 5 pin model for boat trailer that has surge brakes.



This item is extremely well constructed you will not have any issues with it. It is nice that it lights up at night to let you know that is connected correctly.


Outstanding service with numerous updates on status. Excellent company, superior customer service.


Exactly what I ordered and came three days early


Apparently the trailer coiled wire adapters for marine use have a 3 year life span. It is good to know that even with the covid bologna I did receive my coil just before memorial day weekend


With lighted connectors you know you have electricity to the trailer.


Failed 200 miles into first trip, started melting.

Etrailer Expert

Jenny N.


You mentioned that it started melting and I wanted to ask you a few follow questions. Do you have still have the harness? Would you be able to send a picture? Would you also be able to send a picture of the back of your motorhome.


Received the new connector and appears to be HD and good quality. This connector should last ... The coiled conductors should eliminate the excess wire from dragging on the roadway.


Works great. I already had an adapter that did the same thing but needed a bit more cord. Lights up like advertised, super heavy duty. I haven’t used it much but it looks like it will hold up for a long time. Nice to have 5 pins vs most that are 4.


I use this for my boat trailer and it is nice to know everything is working properly.


super heavy duty this is my second one, the first lasted 9 years on my boat trailer and other flat trailers the ground on the 4 prong end broke so I ordered another.


Seems to be a nice quality connector...hope it works well for a few years.


Heavy duty, easy to use, unconditionally recommend it. Looks like it will outlast me!



Works as well today after a year as it did out of the box.


Just replaced one that survived 13 years, love the lights at night.


On time, repeat customer... Products exactly what I wanted. Thanks for delivering what you promised.


Good service...friendly & helpful staff...fair prices.....


I like the red indicator that there is a connection after plugging it into the receptacle.


A quality product and delivered fast. I would recommend etrailer for all your needs.


Exactly what I needed, makes it much easier to see that the connection is working. Very fast shipping too!!


This adapter is a higher quality unit than I anticipated, it works as stated, and was delivered promptly. I would purchase this again.


Product is exactly what I needed, thanks. Quality connections, and the added illumination when connected and working is an added benefit for peace of mind.

Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • Coiled Length of the Hopkins Heavy-Duty Trailer Coiled Wire # HM47025
    I went and pulled a Hopkins Heavy-Duty Trailer Coiled Wire # HM47025 from our warehouse to measure it and found that in its natural coiled state it measures 13-1/2 inches long. If you take the ends and point them away from each other but without stretching the coils it measures 19 inches long.
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  • What Is The Difference Between These Flex-Coiled Wire Adapters by Hopkins - # HM47025 And # HM47075
    These Hopkins wire adapters, Item # HM47025 and Item # HM47075, have similar functions. Both are heavy-duty, coiled cable with weatherproof jacketing. Both have easy-grip connectors and light up when connected. Both are 3 foot when stretched. Both adapt a 7-Way connector to work with a 4-Way or 5-Way flat connector on a trailer. One difference is that the The Hopkins Endurance Adapter, Item # HM47075, has a 3-year limited warranty. I have attached videos for you to check out.
    view full answer...
  • 7-Way to 5-Way Extension Adapter for Boat with Surge Brakes
    Actually the part # HM47025 that you mentioned would be the perfect solution for you to use. The 7-way of the adapter will plug into the 7-way of your truck and then the coiled extension will give you 3 feet of extra wire to attach to the 5-way of your trailer.
    view full answer...
  • Length of Hopkins Coiled Adapter 7-Way Flat Pin Blade to 5-Flat
    The Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow # HM47025 has the yellow coiled section is 3" long. I have attached a video review of this adapter.
    view full answer...
  • What are Pin Functions of 5-Way End on Hopkins Adapter # HM47025
    When looking at the 5-Way end of the Hopkins Coiled Adapter # HM47025 like you described, with the male pin being number 5, the pin functions are as follows: 1. Backup Light Circuit 2. Right Turn/Brake 3. Left Turn/Brake 4. Running/Tail 5. Ground With this in mind it definitely looks like something might be miswired on your setup. The first thing I recommend doing is testing the 7-Way on your RV in the same manner that you tested the 5-Way on the adapter. The functions should match the...
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  • Will Coiled Adapter 7-Way to 5-Flat Adapter part # HM47025 Work on a Boat Trailer with Surge Brakes
    The Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow # HM47025 WILL work for you as long as the reverse light circuit is active on the 7-way of your 2012 Toyota Tundra (it should work). The reviewer you referenced unfortunately was confused on what this product does. Since one end of this adapter only has 5 circuits then there is no way 7 circuits could possibly be carried through the adapter. Since you have surge brakes those additional 2 circuits would...
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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...
    view full answer...
  • Wiring Adapter to Convert Vehicle 7-Way to 5-Pole Flat Connector for Boat Trailer
    Usually a factory tow package on the Suburban has a 7-way type trailer socket, like # HM40975. There are 6-pole wiring products out there but these have a very different appearance. If you refer to the linked article on wiring you'll be able to see each type and confirm which you have. Often the center contact on a 7-way, which carries a reverse light signal, is not counted as it has a different appearance than the other contacts in the socket. If you do indeed have a 7-way with a reverse...
    view full answer...
  • Availability of 8 Foot Flat Towing Umbilical with 7-Way on One End and 4-Pole Flat on the Other
    There's not an available 7-way to 4-pole flat umbilical like what you're looking for, but I do have some easy solutions for you. The Hopkins Nite-Glow 7-way to 5-way flat coiled adapter, part # HM47025 will work with either a 4-pole or a 5-pole trailer connector. It would plug right into the connector at the front of the towed vehicle provided by the Hopkins Towed Vehicle Wiring Harness you referenced, part # HM56302. If the unused socket bothered you, you could cover it with a small piece...
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  • Not All Boat Trailer Lights Light Up Using a 7-Way to 5-Way Adapter On a 2013 GMC Sierra
    Since your truck is new, it is not likely that there is a problem with its wiring. So the adapter you already have could be faulty or there is a ground issue on the trailer. The functions of a 5-Way are as follows: The covered pin is ground. Next to it is the running light pin, followed by the left turn/brake light pin, then the right turn/brake light pin. And at the very end there is the pin for the electric reverse lockout solenoid on your surge coupler. Make sure that your 5-Way on...
    view full answer...
  • Availability of Flat Towing Umbilical Cable Longer Than 3 Feet in Length
    We do offer some longer coiled cables that would work for you. Wesbar offers a 7-way to 5-pole coiled adapter, that will also work fine for a 4-pole. For a 3 foot length, use part # HM47025. For an 8 foot length, use part # 787196.
    view full answer...
  • Can Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way be Used for Flat Towing
    The Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow # HM47025 that you referenced is designed to carry the brake, turns, tail, reverse and ground functions, and is typically used for towing a trailer as opposed to a flat towing setup. I like to recommend the Flexo-Coil Wiring Kit # RM-15267 for flat towing vehicles because it is reliable and allows you to install everything you need for flat towing. It sounds like you're trying to use a trailer brake...
    view full answer...
  • Adapter To Go From Vehicle End 7-Way Round To A 7-Way Flat Trailer Cord
    Yes, we do have an adapter that will work for this purpose with the Pollak Trailer Connector Adapter # PK12-724. This will plug in to the 7 way round pin connector on the back of your truck. The other end of the adapter has the female 7 way flat connector, into which you can plug your trailer cord.
    view full answer...
  • Is 14 ga. Wire Sufficient for Wiring up a Brake Controller
    I would strongly recommend you use a 10 gauge wire in place of the 14 gauge wire as 14 gauge wire is only good for 15 amps which will not be enough for your 2 axle trailer with 4 brake assemblies. For 10 gauge wire you could use our part # 10-1-1. I attached an FAQ article on wiring up a brake controller from scratch for you to check out also.
    view full answer...
  • Needed Connection of 7-Way Flat Pin Blade to 5-Flat/4-Flat
    It is a 7-Way Flat Pin Blade to 5-Flat/4-Flat. To be used with something such as the # HM47025 used for the 7 way RV blade trailer socket on the vehicle and adapts it to work with a 4 or 5-wire flat connector on the trailer.
    view full answer...
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  • Old Trailer Wiring 5-Way had 6 Wires But New 5-Way Has 5 Wires
    The trailer connector that you had is what is called a wishbone harness. It has 2 running light wires so you do not have to run a jumper wire for running lights from one side of the trailer to the other. Wesbar harness # W002290 is an example of a wishbone 5-Way. All you have to do is connect the 2 running light wires from the trailer wiring together and then to the brown wire on the new harness. Or, if you are replacing all the wiring, you would run a jumper wire from one side of the...
    view full answer...
  • Connecting a Boat Trailer with a 5-Way and EOH Brakes to 2015 Ram 3500 with 7-Way Trailer Connector
    Tthe Hopkins connector, part # HM47025, will connect your 2015 Ram 3500's 7-way to your boat trailer's 5-way but it won't power the EOH brakes. Your truck's brake output pin is the in 5 O'clock position which is standard and the center pin is the reverse light circuit. The Hopkins connector uses that reverse light circuit for the 5th pin that's normally on a boat trailer for its electric reverse lockout. Instead I'd cut the trailer's 5-way off and replace it with a 7-way. Part # e99011...
    view full answer...
  • How Many Trailer Brakes Should be Used with a 20 Amp Circuit Breaker or 30 Amp Circuit Breaker
    The recommendation for 2 to 4 brakes is a 20 amp circuit breaker, # PK54520, and for 6 to 8 brakes a 30 amp circuit breaker, # 38630, just as you have stated. Usually, you would go with the smallest sized circuit breaker for the system being used. This is so if there is a problem, it can be caught right away. If you plan on towing trailers with 2 to 4 brakes and trailers with 6 to 8 brakes, it would be best to go with the 30 amp circuit breaker as the 20 amp circuit breaker would not...
    view full answer...
  • Is Hopkins Coiled Adapter 7-Way To 5-Way And 4-Way Flat, # HM47025, Available In 5 Foot Length
    The Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way and 4-Way Flat, # HM47025, is only available in a 3 feet length. I have the RoadMaster 7-Wire to 6-Wire Flexo-Coil Kit, # RM-146-7, that is 8 feet long, but you would need to remove the 6-pole plug and attach the Hopkins Wiring Harness with 5-Pole Flat Trailer Connector - Vehicle End - 5' Long Item # HM37908, to give you a 5-Flat vehicle end or the Tow Ready 4-Flat Vehicle End Harness, # 18002, to give you a 4-Flat vehicle...
    view full answer...
  • How to Use the Coiled Adapter 7-Way to 5-Flat Part # HM47025 with a Reverse Lockout Solenoid
    I assume you are referring to the reverse lockout solenoid wire and if that is the case then you would need to wire or check that the trailer side trailer connector has this wire on the far left pin which you can see in the attached photo of similar to the Hopkins Coiled Adapter 7-Way Flat Pin Blade to 5-Flat # HM47025. This pin should then match up with the reverse light circuit on your vehicle's 7-way.
    view full answer...
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  • Recommended 2-1/2 Inch Trailer Hitch Extension and Wiring for Boat Trailer Behind In-Bed Camper
    It sounds like you need about a fairly long extender and there unfortunately is not an extender that isn't also a reducer for your 2-1/2 inch hitch receiver. My recommendation is to use the Curt Hitch Extension and Reducer for 2-1/2" Trailer Hitches - 24" to 34" Long # C45048 which has the same capacities as the similar Reese # RP45292 and then use a more cost effective option for your ball mount like the Curt Channel Style Adjustable Ball Mount # C45900. This will give you an adjustable...
    view full answer...
  • How Many Wires Inside Wesbar Coiled 7-Way Flat Pin Blade to 5-Flat Adapter # HM47025
    The Hopkins Heavy-Duty Trailer Coiled Wire Adapter 7-Way to 5-Way Flat with Nite-Glow # HM47025 actually has 5 wires. This adapter takes a trailer-side 7-way plug and mates it to a 5-pole flat connector. All 5 pins on the 5-pole are connected at the 7-way side but a 12V power feed and trailer brake circuit are NOT supported. Two pins on the 7-way are inactive. If you need 7-wire jacketed cable we offer Deka # DW04914-1 which is sold by the foot and that has no connectors included. Or if...
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  • Recommended Way to Re-Wire a Boat Trailer with a 7-Way Plug
    The adapter will work but it's more of a short-term solution because of the potential corrosion issues in the future not to mention when you introduce additional connection points problems can arise. I would test the reverse lockout (purple or blue wire) with a circuit tester with the 7-Way center pin. If that works you are good. I would recommend rewiring the trailer with a 7-Way plug because it will prove to be more reliable than using an adapter. I would start with a trailer junction...
    view full answer...
  • Towing Triton Bass Boat Behind 2017 Ram 1500 Short Bed with Lance 650 Truck Bed Camper
    In order to tow your Triton boat behind your 2017 Ram 1500 with the Lance 650 on board, you need a Class V hitch like the Curt # C15572 . Once you have the Class V hitch, you need an extender bar similar to the Hitch Extender # HE18 paired with an extended ball mount like the Hidden Hitch 13-1/4" Extended Ball Mount # BH20 in order to get the correct length clearance from the back of your camper. You'll also want to consider adding a wiring extension like the Hopkins Coiled Adapter 7-Way...
    view full answer...

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