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Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade

Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade

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This kit converts your vehicle's 4-way flat trailer connector into a Quick-Install 7-way, RV-style connector. Harness plugs into your existing 4-way and hardwires for other pins on 7-way. Round plug on harness plugs into the back of the 7-way. Lowest Prices for the best trailer wiring from Hopkins. Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade part number HM47200 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (32)
  • Q & A (0)
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  • Why etrailer?

Hopkins Trailer Wiring

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

This kit converts your vehicle's 4-way flat trailer connector into a Quick-Install 7-way, RV-style connector. Harness plugs into your existing 4-way and hardwires for other pins on 7-way. Round plug on harness plugs into the back of the 7-way.


  • Kit converts your vehicle's 4-way flat trailer connector to a 7-way, RV-style connector
  • Simple installation
    • Wiring harness plugs into existing 4-way flat connector and hardwires to existing wiring
    • 7-Way connector plugs into harness
  • Lid opens 180 degrees for easy connections
    • Keeps out dirt and moisture
  • Enhanced weatherproofing with internal seals and corrosion-resistant terminals
  • Extremely durable ABS plastic construction and oversize lid hinge
  • Mounting screws and dielectric grease packet included
  • 3-Year limited warranty

This kit converts your factory 4-way flat, vehicle-end connector (pictured on the left) to a 7-way, RV-style connector (pictured on the right).

Hopkins 4-Way Flat to 7-Blade Vehicle-End Converter

47200 Hopkins Endurance Quick-Install 4-Way Flat to 7-Way Blade Trailer Connector Adapter - Vehicle End

Item # HM47200

California residents: click here

Customer Reviews

Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade - HM47200

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

This kit converts your vehicle's 4-way flat trailer connector into a Quick-Install 7-way, RV-style connector. Harness plugs into your existing 4-way and hardwires for other pins on 7-way. Round plug on harness plugs into the back of the 7-way.


Simple install. I was going from a 4-flat plug to a 7 blade without trailer brakes, so it was nice and simple. I was going to cut the extra wires off, but decided against it. I just zip-tied them up out of the way JIC I need them later.


Used this to install a 7 pin plug on my vehicle instead of having to use an adapter on the 4 pin plug. Hooked it up to the travel trailer and lights worked great.


Excellent products that resolved my trailer connection issues. The "Hopkins Quick-Install Trailer Connector Adapter 4-way flat to 7 blade HM47200" and the "T-1 Vehicle Wiring Harness with 4 Pole Flat Trailer Connector 118334" were the perfect combination for the quick, simple and successful installation on my 2001 Dodge Durango. Along with the great products "etrailer" provided helpful information on their website, and fast shipping! Thanks again!


The 4 Pin Flat to 7 Pin Trailer Connection was very hard to find. Thanks for the Products that you make of high Quality. You won’t go wrong with ETrailer Products.


The adapter works great! I used it the day that I got it. I have an 18' car trailer that I just needed to take down to get a VIN inspection and I wanted to use my Jeep Wrangler because it's so easy to maneuver the trailer. I plugged the 7 blade from the trailer into the adapter, plugged the 4 wire flat into the Jeep, connected the ground wire, and the lights and turn signals all worked fine!!!!


Used the wiring harness and an adapter plug to give my Cherokee a factory installed towing kit look. No connector wires visible. Great product.


Easy installation - all parts were good and the installation video was very helpfull


Product works great as described

to pick up new trailer 7 pin connector with my explorer which has a four pin connector.


Simple plugs right in to existing 4 pole (flat) ground the white wire and lights will work but 3 more wires still need hard wired inn . 10 min install


Great customer support helping me track my order, very quick responses. Ordered on Sun. got it on Wed. Missouri to Wisconsin. USPS priority mail.


I wish I could have just got a plug that was 4 way flat to 7 blade, but this was all I could find. It will work for what we need it for.


Worked great!
Perfect fit exactly as
Fantastic customer service from etrailer.


Quick delivery, excellent installation videos.


great product, just what i needed to pair up with my 4 way


the product was as advertised and better. could not find one anywhere, would purchase more products as needed,


Have not installed this yet but the product showed up within a couple of days and looks to be high quality and just what I need. very pleased.


Worked out great. I didn't have to rewire because of this adaptor. Plugged my rv plug in and then connected to my 4pin truck.


Product was exactly as ordered and a day early!!

I use my truck and trailer on a regular basis and the hitch and wiring are working well, no problems.Thanks!
Harry D - 02/10/2018


Everthing,was great and worked out fine.I will do buisness again with you someday :::thanks


perfect product and does what i need.


all was great.just what i needed works well came very fast by mail. thanks much


Easy to install. Works just like it was described.


Awesome product! Great service and very speedy delivery!


This product is exactly what it was represented to be. It appears to be of good quality and capable of doing what I need from it.


I had no problems with this product.

Show More Reviews

Ask the Experts about this Hopkins Trailer Wiring

  • How to Ground the Hopkins Endurance 4-Way to 7-Way Adapter # HM47200
    The ground wire from the Hopkins Endurance 4-Way to 7-Way Adapter, # HM47200, should be grounded to either a clean, bare metal surface on the frame of the vehicle or to an existing ground stud on the vehicle. On the trailer side, the ground wire from the trailer connector should be connected to a clean, bare metal surface on the trailer frame. I have attached a typical trailer wiring diagram and highlighted the vehicle and trailer ground wires for you to check out.
    view full answer...
    Image 1 for
  • Hopkins Quick-Install Trailer Connector Adapter # HM47200 Recommendation for a 2003 Dodge Dakota
    Yes, the Hopkins Endurance Quick-Install Trailer Connector Adapter # HM47200 that you referenced would work great for you and would only require you to plug the 4-way of the adapter into the 4-way of your 2003 Dodge Dakota and the trailer lights would function.
    view full answer...
  • Troubleshooting no Running Lights with the Hopkins 7-way to 4-way Adapter part # HM47200
    The Hopkins Endurance Quick-Install Trailer Connector Adapter # HM47200 that you referenced should work well without any modifications. It sounds like the running light issue you are seeing is on the 4-way of his F150. Use a circuit tester like our part # 3808 to test the pin with the brown wire coming out of it for voltage when the head lights or running lights of his vehicle are on. If there is no voltage there then the problem is on the vehicle side of the wiring. Trace the circuit...
    view full answer...
  • Troubleshooting 2011 Lincoln MKX That Will Not Start After Installing The 7 Pin Wiring
    Since your vehicle has power, you will want to check your battery. It sounds like you have enough power to run your lights, etc, but don't have the cranking amps to turn over your vehicle. If your battery does have the cranking amps, then check the ground wire from your battery to the frame and the new ground wire on your 7-way. You want a bare metal to metal connection. We can keep troubleshooting if you have an issue after trying these options.
    view full answer...
  • Troubleshooting Brake Controller that Locks Up Trailer Brakes Till Brake Pedal is Pulled Forward
    You have a bad brake pedal switch. It's sticking which is why your brake lights are staying on and your brake controller wants to lock the brakes up. You can try cleaning the switch with some electric parts cleaner to see if you can get it to work smoother and free up but what you really need is a replacement switch.
    view full answer...
  • 4-Way to 7-Way Adapter Recommendation for a Trailer That Does not Have Brakes
    Since your trailer doesn't have brakes you could use the # HM47200 as an adapter for your 2016 Toyota Highlander. You would just want to tape up the extra wires that wouldn't be used. After that you would just need to plug in the 4-way of the adapter to the 4-way of your vehicle and the 7-way would be ready to plug into the connector on your trailer.
    view full answer...
  • Ground Wire On My Hopkins 4 Flat To 7 Not Connected.
    The Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade Item # HM47200 does have a white ground wire going to the 4-way flat connection. The contrast on the photo may be hard to differentiate on your screen or mobile device. It is there though, so no there will be no problem!
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2015 Chevy Tahoe
    For a 2015 Chevy Tahoe that did not come with a factory installed 7-Way you can add one using # 30955. Installing this part will actually give you both a 4-Way flat and a 7-Way. I have included a link to a video showing an example installation.
    view full answer...
  • Wiring Kit to Install Electric Brake Controller
    There is a kit available for you to wire in your electric brake controller. Since you already have a 4-way as well as the Hopkins Adapter # HM47200 you will need the Wiring Kit for Electric Trailer Brake Controllers # 5506; I've added links to video reviews of this kit for you to take a look at.
    view full answer...
  • Is the Hopkins 7-Way Adapter HM47200 Compatible with the Gooseneck 7-Way Adapter 41157
    Yes, if you used the # HM47200 as a way to wire in a 7-way on your truck you could then use the part # 41157 as a way to also install a second 7-way in the bed of your truck for a gooseneck hitch or a fifth wheel hitch.
    view full answer...
  • Adapter for 4-Flat on Truck and 7-Way on Trailer
    We do have a solution for you, though the Reese Trailer Connector Adapter # 78118 will not work for you. Instead I recommend the Hopkins Endurance Quick-Install Trailer Connector Adapter # HM47200 which will plug into your truck's 4-way and allow you to connect your trailer's 7-way.
    view full answer...
  • Recommended 4-Pole to 7-Way Trailer Connector Adapter
    The # HM47200 would indeed adapt your existing 4 pole to a 7-way blade-style trailer connector. In that respect, it would work just fine. However, I typically recommend going with the # 37185 instead, as the adapter also offers a 4-pole connector. If your trailer doesn't have or need trailer brakes or a need for a 12-v power supply, you'd simply plug the adapter into your existing 4-pole, and ground the white tire to the vehicle frame. This will provide you with lighting functions, and...
    view full answer...
  • Replacement 7-Way/4-Way for 2006 Dodge Ram 3500
    We have the Pollak 7-way and 4-way kit part # HM40975-11933 which is designed to plug into the square connector at the rear of your 2006 Ram 3500 and give you both a 7-way and a 4-way like you are wanting. But whether or not this will plug right into the truck depends on where the previous owner of your truck cut the wiring. If you can trace the wiring back and find the square connector this plugs into then this would be the correct solution. If this connector was cut off then you'd have...
    view full answer...
  • 7-Way/4-Way Adapter Recommendation that Has Both Connectors Active
    The 4-way and the 7-way sides of the 7- and 4-Pole Trailer Connector Socket # HM40975 are both active at the same time but you'd most likely find that accessing both connectors at the same time would be challenging due to the lid design of the adapter. A better option that uses the same round connector is the part # 30955 which gives you both trailer wiring connectors active at the same time.
    view full answer...
  • Can Hopkins Endurance Trailer Connector Adapter Just be Grounded and Other Wires Not Connected
    Yes, you can just plug in your 4-Way to the Hopkins Endurance connector, # HM47200, ground it, and not connect the remaining wires if they are not needed. You can tape them up and stow them out of the way. For future reference, the blue wire would connect to the brake output circuit from a trailer brake controller. The red wire would connect to the positive battery terminal via a 40 amp circuit breaker # PK54540. And the last wire would tap into the reverse light circuit.
    view full answer...
  • Adding a 7-Way Trailer Wiring Harness at the Back and in the Bed of a 2003 Ford F-350
    If your 2003 Ford F-350 has a factory installed 4-Way wiring harness then to add a 7-Way you will need adapter # HM47200. You can then follow the installation instructions outlined in the FAQ article I have linked for you. To add a 7-Way in the bed after you have installed the rear 7-Way you will need to use harness # 41157. This will basically plug in line with the rear 7-Way and the long cable allows you to mount the 7-Way receptacle in the truck bed.
    view full answer...
  • Installation of Hopkins Endurance 4-Pole-to-7-Way Trailer Connector Adapter HM47200
    When the Hopkins Endurance Quick-Install 4-Pole-to-7-Way Trailer Connector Adapter # HM47200 is connected to vehicle 4-pole wiring it will pass through only those basic lighting signals unless the pigtail leads for the other circuits are connected. On this item those extra pigtail leads are as follows: blue is for connection to a trailer brake controller to deliver its output power to the 7-way to activate trailer brakes; the red wire is for the 12V auxiliary power feed and connects to...
    view full answer...
  • How to Install Combination 4-Pole/7-Way Trailer Socket on 2004 Dodge Ram
    Since you need to tow two trailers with different types of wiring, one each with a 4-pole flat connector and with a 7-way blade style, you can install our # ETBC7 kit. This includes a combination 4-pole/7-way vehicle socket and all the connectors and wiring needed to install it. Your existing 4-pole will plug right in to the mating connector on the 7-way and you'll then make the other circuit connections for 12V power, reverse light signal and trailer brakes. I have linked both an article...
    view full answer...
  • Recommended Solution to Add 7 Way Trailer Harness for Trailer Without Brakes to 2017 BMW X5
    We've got just what you're looking for; I recommend using the Hopkins Endurance Quick-Install Trailer Connector Adapter - 4-Way Flat to 7-Blade # HM47200, which will allow you to plug your existing 4 way in and give you a 7 way plug to use with your trailer. You will need to make the ground connection on the new trailer wiring harness, but the other wires can be taped up and left to the side. In order to mount this harness I recommend using the Mounting Bracket for 7-Way # 18138. I've...
    view full answer...
  • Availability of 7-Way/4-Way that has Test Lights
    We have the Curt 7-way and 4-Way part # C57674 which has the LED tester lights on the side of the 7-way.
    view full answer...
  • Adding a 7-Way Trailer Connector and Brake Controller to a 2003 Toyota Highlander
    We actually have a kit that includes everything you will need to add a fully functional 7-Way trailer connector to your 2003 Toyotas Highlander. It is 4- and 7-Way installation kit # ETBC7. Once installed it will provide you with both a 4-Way and a 7-Way connector. It comes with the wiring and circuit breakers you will need along with a mounting bracket. I have included a couple of links that explain and show the ETBC7 installation for you. If you will be towing any trailers that have...
    view full answer...
  • Brake Controller Install on 2000 Ford F-150 With 4-Flat trailer Connector Using Adapter # HM47200
    The additional wire leads on the Hopkins # HM47200 Quick-Install Trailer Connector Adapter are provided to deliver additional signals to the 7-way vehicle socket. These signals include the brake controller output signal (blue wire), the trailer 12V power feed (red wire) and the vehicle's reverse light signal (purple wire). The white wire is ground. The blue lead connects to the blue wire at the back of your brake controller; the red wire connects to your vehicle battery positive terminal...
    view full answer...
  • Parts Needed to Install a 7-Way Trailer Connector on a 2007 Honda Odyssey
    I installed a trailer hitch and trailer wiring on my mother-in-laws 2007 Honda Odyssey and I can tell you that unfortunately there are no plug-in 7-way wiring harnesses. To install a 7-way connector on your Odyssey, I recommend first installing a 4-way harness like the Tow Ready T-One Wiring Harness, # 118438. This is a plug-in harness that does not require cutting or splicing. I have attached the installation instruction and an installation video on a 2007 Honda Odyssey for you to check...
    view full answer...
  • Troubleshooting Trailer Tail Lights not Working on a 2004 Nissan Titan Towing a 2006 Coachman 30 ft
    The first thing I would do is check for voltage at the trailer connector on your 2004 Nissan Titan. You could use a circuit tester like our part # 40376 to test for the correct voltage on the trailer connector. Check out the video I attached that shows how this is done. If the voltage is good then you know the problem is in the trailer and not your 2004 Nissan Titan. What you can do is check the trailer side and vehicle side trailer connectors. You will want to look for any dirt or corrosion...
    view full answer...

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