Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV
(59 reviews)
Price: $28.94
In Stock
Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV
Item # HM47425
Retail:$42.84
Our Price: $28.94
You Save: 32%
In Stock
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- Reviews (59)
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Hopkins Trailer Wiring - HM47425
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug and Lead
- 7 Round - 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.
47425 Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV
California residents: click here
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- Did not arrive in time
Customer Reviews
Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 7-Pole RV - HM47425
Average Customer Rating: 4.8 out of 5 stars (59 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.by: Matt12/13/2021
Product won't work correctly. I've tried it with 2 different trucks and 3 different trailers. Each Turn signal will active the hazard lights, and no tail lights. When pressing brake lights, all side marker lights will light up.
by: Rod H.09/09/2017
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!
Rod H.
9/15/2018
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
by: Travis10/22/2023
Brake doesn't work locks them up
Katrina D.
10/23/2023
It seems that they are locking up because your set up will require part # c59236 and part # etbc7. As per one of our installers, semi's have a separate stop turn circuit because their trailers have air brakes. You will not be able to use that adapter with your semi harness. Your semi harness does not have a wire to carry electric brakes. These wiring kits will give you a functional 7-way on the back of your semi. If you are needing some assistance in finding a brake controller for your application, please let me know.
by: TimM08/02/2019
The wiring plug in for my tractor to trailer works great! Etrailer did a great job helping me pick the correct wiring plug!
Tim M.
8/3/2020
It is still working well after 1 year!
by: William 12/04/2022
I will order all my trailer needs from etrailer.com from now one. It was excellent being able to order what I needed and cheaper than the auto parts store.
by: Kenneth 08/31/2021
I thought I would need this more than I do but I haven't towed the trailer with the tractor where I needed lights or turn signals. Works well, actually better than the tractor, half the lights don't work. (Electrics by Lucas, prince of darkness)
by: Steven03/05/2013
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!
by: Shannon 12/01/2022
Hey just what I needed in a pinch to hook my gooseneck to my semi to tow my regular truck and got it to me just when I needed it thank you
by: Adam 06/23/2023
Excellent product and A-1 shipping. Great response from company on shipping time
by: Gary06/07/2018
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
by: Assar11/04/2020
Wanted to be able to use the lights on a 30' flatdeck with my tractor for hauling round bales. This adapter works great. Photo attachment didn't work, but the 7 round-pin on my JD 7200R to the 7 flat pin on my trailer worked. Seems well made.
.
by: Shawn 01/15/2020
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.
by: Brian D. T.08/18/2021
I ordered the wrong wiring harness and was given a return slip for credit once I realized my mistake. I was sent the correct one immediately and it fits perfectly. Great service and very reasonable costs. Thank You!
by: Ricky Z11/07/2015
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
by: Joe Kearney09/23/2016
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.
by: Todd05/21/2015
The trailer adapter is exactly what I needed. Thanks for all the help
by: Steve 07/18/2021
Worked great for my needs. I only needed the round 7-pin end so I cut off the 7-blade end and wired it for my need.
by: Mark T07/31/2017
Works well, converting from one type plug to the other in our fleet saves time from having to rewire all trucks/trailers
by: David08/19/2013
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
by: Jonathan08/04/2018
Perfect.... Exactly what I needed to hook up my fifth wheel camper to semi!!! Thanks
by: Doug03/29/2022
fits between the tractor and trailer
by: Robert06/09/2019
Works great
Robert R.
6/9/2020
Best ever
by: David 10/17/2019
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.
by: Steve K.07/01/2015
The product is excellent.
I will be using this website again.
Sorry for the delay on my response.
by: Garry 05/13/2020
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. :-)
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See what our Experts say about this Hopkins Trailer Wiring
- Why Wouldnt 7-Way Adapter # HM47425 Allow Stoplight Circuit of Trailer to FunctionDoes your trailer have separate brake lights from turn signals? If so, the part # HM47425 will not work without also installing a taillight converter on your trailer like # 118158 so that you can then run the red wire of the converter box to the stoplights of the trailer. The 7-way configuration of the # HM47425 only allow stoplights and turn signals to be carried on the same circuit.
view full answer... - Availability of 7-Way Round to 7-Way Blade Trailer Connector AdapterWe have an adapter that was designed specifically for that with the Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade # HM47425. This will plug into your vehicle's 7-way round and give your trailer a 7-way blade connector.
view full answer... - 7-Blade to 7-Way Round Trailer Connector Adapter for TractorThe Trailer Connector Adapter part # HM47425 is not offered with wire leads 36" long nor do we have a similar one that is. However, what you can do is make your own very easily using the Pollak Vehicle Side 7-Blade part # PK12703, Trailer Side 7-Round part # PK11700, and 7-Way Jacketed Wire part # DW04914-1 (per foot). This option will also provide you with much more durable metal trailer connectors.
view full answer... - Availability of Adapter to go From 7-Way Round of Vehicle to 7-Way BladeWe have an adapter that was designed specifically for that with the Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade # HM47425. This will plug into your vehicle's 7-way round and give your trailer a 7-way blade connector.
view full answer... - Adapting 7-Way Round Pin Connector on Tractor Trailer to 7-Way RV Connector on TrailerTo combine the brake lamp and turn signals combined on one circuit, you'll need a taillight converter like part # 119250KIT. You'd also need an adapter, constructed from # PK11700 and # PK12-707E and a length of # DW04914-1 cable.
view full answer... - Making an Adapter to Go from a 7-Way Round Pin Semi Connector to 7-Way Blade Trailer ConnectorAdapter # HM47425 is designed to work with a vehicle or RV style 7-Way round pin so it would not work with the semi style 7-Way for the exact reason you mentioned; the functions are different. You could install a separate 7-Way just for travel trailers using a hardwire harness for the lights such as # 119250KIT and then installation kit # ETBC7 for the 7-Way and provisions to install a brake controller.
view full answer... - Will Pollak Trailer Connector Adapter Work For Wiring From Dump Truck To Equipment TrailerTo determine if the Trailer Connector Adapter # HM47425 will work for your set-up, you will want to test to functions of the pins on the vehicle-end connector using a circuit tester, # PTW2993. Typically, the wiring connectors on commercial trucks aren't wired the same as the connectors on utility/equipment or travel trailers. I have attached a photo showing the likely functions of the pins in your vehicle-side connector. I have also attached a photo showing how the functions would need...
view full answer...
- Pin Designations of the 7-way Round and the 7-way Flat on the 7-way Flat to Round AdapterI have attached a diagram that shows the pin designations for the 7-Pole Round to 7-Pole Flat Trailer Connector Adapter, # HM47425. I labeled the pins as they relate to the RV side 7-way blade connector. The 7-way round pin connectors typically have different pin functions than RV style 7-way blade connectors. You may want to make sure the 7-way connector on your tractor is wired properly to match the functions of the adapter to ensure everything works correctly on the trailer.
view full answer...
- Availability of 7-Way Round Pin Wiring ExtensionWe 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 # 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 round pin to female 7-way...
view full answer... - Adapter Recommendation for Going From 7-Way Round to 7-Way BladeWe have an adapter to go from a 7-Way round pin on a tow vehicle to a 7-Way blade style on a trailer. You could use the # HM47425. This 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 part # RM-732.
view full answer...
- 7-Way Round to 7-Way Flat Adapter RecommendationIf your vehicle has a 7-way round connector like a Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket # PK11720 then you could use a Trailer Connector Adapter # HM47425 to allow you to tow a trailer with a flat 7-way connector. I also attached an FAQ article on wiring for you to check out also. I would recommend you test the 7-way on your semi and determine if the 7-way has separate or combined tail light circuits. If you have separate circuits on the trailer connector you would need...
view full answer... - Best and Easiest to Transfer Trailer Brake Controller for Two TrucksThe best option - by far - for an easily transferable brake controller that you can use in both your 1999 GMC Suburban and 2009 Chevy Silverado 2500 is the Curt Echo Wireless Trailer Brake Controller # C51180. Just pop it in and out of the 7-way on both vehicles and that's all there really is to it. Just use your smartphone to set it up on both and has a memory so you can save your profiles, meaning you don't have to set it up more than once per vehicle. It truly is the perfect option...
view full answer... - Can the Trailer Connector Adapter HM47425 Be Used UnmountedIf you didn't want to permanently mount the # HM47425 you could easily leave it hanging. As long as it doesn't drag the ground when traveling you would be fine.
view full answer... - Recommended Adapter to Convert a 7-Round to a 7-Flat Trailer ConnectorWe have you covered. Using the Hopkins Trailer Connector Adapter part # HM47425 will allow you to plug into your 7-Round then plug the goosenecks directly into it. This will convert the signals and give you the appropriate wiring needed. Check out the video I linked for you on the adapter.
view full answer... - Are Hopkins and Pollak 7-Way Round Pin to 7-Way Blade Trailer Connector Adapters the SameHopkins 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... - Converting From 7-Way Round with Separate Turn SIgnals Brake Signal to 7-Way Blade with CombinedSince your 7-way round connector has the stoplight circuit separated from the turn signal circuit what you need is a taillight converter to put both circuits on the same wire like what the 7-way blade you are wanting to install uses. So for that you'd need the part # RM-732. Then for a 7-way connector we have the part # PK11893 as well and you'd be set.
view full answer... - 7-Pin Round Vehicle Side Connector To 7-Pin Blade Trailer Side Connector AdapterWe do have the Pollak Trailer Connector Adapter # HM47425 which adapts from a 7-pin round to 7-pin blade trailer connector. This adapter will only work if your tractor 7-pin has combined brake lights and turn signals. If your tractor 7-pin has separate brake lights and turn signals you will need a 7-Round # PK11700, 7-Blade # PK12-707E and 3-wire to 2-wire Module # HM48847. This will allow you to create your own custom adapter which will work with the different 7-way type connectors....
view full answer...
- Determining Functions of Trailer Wiring 2020-21 Kenworth T270 Most likely the wiring color codes of your Kenworth are not standard so what you'd need to do is use a circuit tester like the # PTW2992 to determine what they are and wire by function instead.
view full answer... - Is Curt Echo Compatible with 7-Way Round Semi Plug-InThe Curt Echo Wireless Trailer Brake Controller # C51180 is compatible with 7-Way blade style sockets, but if you use the Trailer Connector Adapter # HM47425 it should make the Echo compatible with the 7-Way round socket on your semi. Below is a list of the wire configuration for this product and then I'm also linking a review video for you to check out: White: ground return Black: clearance, side marker and identification lights Yellow: left turn signal and hazard signal Red: stop lights...
view full answer... - Parts Needed To Make A 7-Way Round Pin ExtensionThough we can get you what you will need you will have to assemble it. There are three parts that you will need to make a round 7-way round pin connector they're listed below: The Male 7-Way Round Connector # PK11702 Jacketed 7-Way Wiring (Sold by foot) # DW04914-1 you will have to purchase the quantity in the amount of extension length you will need. 7-Way Female Connector # PK11720 These three parts will easily wire to each other making your the 7 pin male to female trailer connector....
view full answer...
- Adapter to Connect a Round 7-Way Trailer Connector on a Semi to a Gooseneck Trailer with a 7-BladeUse 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... - Why Would RV Style 7-Way Installed on Vehicle with 7-Way Round No Brake LightsDoes the 7 pole have separate turn signals from stoplights? That is pretty common on heavy duty applications so it sounds like what you'd need for the RV style 7-way is a signal converter like the part # RM-732 which will combine the circuits like the RV wiring uses instead.
view full answer... - Adapting a 7-Way Round Pin Connector on a 1992 Ford F-150 to 7-Way Blade Style ConnectorTo adapt a 7-Way round pin vehicle side connector to a 7-Way blade style connector use adapter # HM47425. The adapter will route the functions to the proper pins on the output side so you would not have to move any wires around.
view full answer... - How to Adapt a 7-Way Round Connector to a 7-Way FlatThe easiest way to go from a 7-way round connector to a 7-way flat would be to get a Trailer Connector Adapter part # HM47425. However, if you are looking for a more permanent solution you would need to remove your 7-way round connector and wire up the trailer wiring to a 7-way flat connector like part # PK12706. In order to do that check out the different diagrams I attached that will help you wire up the new connector. The wiring could be different so you may need to verify the functions...
view full answer...
Do you have a question about this Trailer Wiring?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Written by:
Tyler C
Installed by:
Kathleen M
Updated by:
Alexander C
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Sierra K.
12/16/2021
It sounds like something is not wired right in the plug. This item has a 90 day warranty so I will have Customer Service reach out to you. Attached is a help article that explains which color wire each function should handle:
Helpful Links
faq-wiring-7-way.aspx