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Adapter 7-Pole to 6-Pole - Universal

Adapter 7-Pole to 6-Pole - Universal

Item # 47549
Our Price: $22.58
Trailer Wiring
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Shipping Weight: 0.25 lbs
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Hopkins Wiring Adapters - 47549
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Great Prices for the best trailer wiring from Hopkins. Adapter 7-Pole to 6-Pole - Universal part number 47549 can be ordered online at or call 1-636-306-4830 for expert service.
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Hopkins Trailer Wiring - 47549

  • Wiring Adapters
  • Single-Function Adapter
  • 6 Round
  • Plug Only
  • 7 Round - Blade
  • Hopkins

Adapter converts your 7-pole plug on the vehicle down to 6-pole plug to fit your trailer's connector.

Note: Center pin is set-up as the hot lead but can easily be changed to work with trailers that have the center pin wired as the brake.

47545B Adapter 7-Pole to 6- Pole - Universal

California residents: click here

Video of Adapter 7-Pole to 6-Pole - Universal

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

Video Transcript for Review of Hopkins 7-Way Blade to 6-Way Round Pin Wiring Adapter - 47549

Jeff: Hello everybody, this is Jeff at Today we're going to take a look at this Hopkins seven way blade to six way round adapter. Now this adapter will plug into your vehicle's side seven way blade socket, and it converts your connector format to a six way round pin type. You can see it has this nice tethered dust cap on it, then when it's not plugged in, you can protect the terminals.Now, one note on this adapter, the center pin is set up as the more common 12 volt hot lead, but it can easily be changed to work with trailers and will have the center pin wired as the brake. And to do that, what you'll first want to do is you'll need a circuit tester to test the pins in your six way connector. Basically just ground the alligator clip to the vehicle chassis, and then touch the test light to the center pin on your six way connector.

If the light and the tester lights up, then that means the center pin is hot so it's wired for 12 volts. So you can use it as-is.If the center pin is for the brakes, it'll only have power when your brake pedal is applied or when the manual brake lever on the brake controller is activated. So if it does work that way, you need to switch it. You can easily do that. What you'll want to do if you need to switch it, all you have to do is switch the blue and the black wires that are inside this adapter.

So what you'll do is basically just remove this tethered dust cap, and then if you'll notice right here, there's two screws here and then two right up here. If you just unscrew all four of those screws, this'll split in half, in the inside you'll be able to see where the black wire is attached to the center pin. And then you also see a blue wire, all you have to do is just switch the black and the blue wire, attach them back down, put your screws in. Go ahead and put your dust cap back on, and just like that you're ready to go. So it's pretty easy to switch between the two.But that should do it for the review on the Hopkins seven way blade to six way round adapter..

Customer Satisfaction Score:

Customer Reviews

Adapter 7-Pole to 6-Pole - Universal - 47549

Average Customer Rating:  4.8 out of 5 stars   (73 Customer Reviews)


Added the gooseneck trailer plug in bed and I wanted to be compatible with new and old style plugs. Adapor worked great.

Grant - 03/20/2021


We had been having trouble with our other adapters, no brakes or intermittent brakes. This adapter fits better than any of the others ever have, great connection and is holding tight. I will be picking up some more of these. The only downside to me was they came on the value shipping which is rather delayed for us and I would rather pay to get it here more quickly. I was needing it and it was several days getting here. We ship a lot and I know shipping directly with USPS goes faster than that and is not expensive.

It works just like new! No complaints at all. I noticed another review stated theirs is not fitting, sometimes the pins can get a little distorted on the vehicle side and can be easily straightened.
Jo A - 01/28/2020


I unplugged the broken plug-in trailer part from my truck
and attached the new part that I bought from your company. It actually fit in the same holes which I bolted back on. Plugged it back in to my truck, hooked up my horse trailer and all my lights worked!!!! I didn’t replace the male end on the horse trailer and it all matched up perfectly. Very easy to install


One year ago I called etrailer to order parts. The customer service rep was very knowledgeable and helpful. Thank goodness for knowledgeable people. Makes my life easier. I do think etrailer has a good system in place and a desire to excell and be good at what they do. The products still work fine. Thank goodness- since etrailer doesn't do the manufacturing.
Thanks etrailer.


Bought this adapter to use pulling our horse trailer. It's worked great.
Cathy was very helpful when I called with questions prior to purchase.

The trailer light adapter has worked just fine. I only use it periodically, but when I have, done the job!!! Thanks for checking on it!
KP - 11/15/2017


This was just the adapter I was looking for but no one had enough information to determine the brake signal wiring for sure - except for etrailer. Their technical information is always way ahead of the others. The price was great as well. Delivery was outstanding. They will get all of my business for trailer supplies.


Was easy to change 12v and electric brake wire internally for trailers with the two opposite of each other causing brakes to lock.


Very good product, fit both ends well. the 6 point side that is for a trailer was just a tad loose but alittle electrical tape for extra insurance works fine.


Works great. Does what its supposed to do - converts a 6 pin round plug on a trailer to a 7 pole jack on the truck.


Great products, fast delivery and good prices. They had everything in stock including the Ford specific brake cable and 7 to 6 pole adapter. Ordered last Monday. Received on Thursday. Put every in this weeked and am using it today (one week after order placed.


Worked great, all lights worked. Want to thank Diana for her help ordering this product and shipping it to us on time for us to go camping.

Thanks again


Appears to work well adapting a 7 pin motor home to a 6 pin magnetic light system.


Works as designed. It's wired for the six pin round to have the center pin as the aux, and the electric brake on the outer ring, which is fine. I note the advertisement says these two pins can easily be swapped, but there was nothing in the instructions which indicated how that might be done.


The adapter arrive in record time and worked very well. The web site had useful information that helped in the selection.


I needed another product that I couldn't find locally and also needed this so I ordered it from etrailer also. Postage cheaper than gas to go find one and etrailer price was very resonable. Nice people, great commication, and super fast shipping.


Great product - just what I needed and good quality


This product worked perfect to upgrade my trailer to my newer model wiring system on my tundra


Good quality product. Easy to change pin configuration. Great replacement for worn out adapter. Received product in just a few days.


Got a new truck and needed an adapter for our soon to be traded in trailer. This worker great. I have ordered several items form etrailer and their service is great.


The product works fine but... what a great company. An informative website and great followup. All companies could learn something from eTrailer's example. They really care about what I think.


Love this cause, I just don’t have the time to re- wire the bucket truck so it’s nice to just plug this in an I can hook are chipper up !!!!


Fast service getting items


Plugged it in and worked from the get g o!!!!


As always orders was processed, shipped. and delivered without any problems. Very timely. Thanks etrailer!


Good quality adapter. Well made.

Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • Troubleshooting Brake Controller that Causes Trailer Brakes to Lock Up and Turn Signals to Not Work
    What you are experiencing is a common problem. Does the truck have a 7-Way connector and the trailer has a 6 way? If so, and you have used a 7 to 6-Way adapter to make the connection, the problem could be the adapter. There are two possible ways to wire the 6-Way connector. One uses the center pin as the brake lead, the other uses the center pin as the 12V lead. What is occurring in your case, is that the adapter is applying the 12V to your brake lead, thus locking the brakes every time...
    view full answer...
  • Trailer Brakes Immediately Lock When Trailer Plugged In
    I think I know what is happening here. Does the adapter you are using have 5 pins in a circle, plus one in the middle? This is a 6-way connector, there are two generally accepted ways of wiring this connector. One method uses the center pin as the brake output circuit, the other uses the center pin as the 12-volt accessory power lead. If your adapter is wired one way, and the trailer is wired the other, your brakes will lock immediately upon plugging the trailer in. We offer a universal...
    view full answer...
  • Trailer Brakes Immediately Lock When Trailer is Plugged In
    There are two accepted ways of wiring a 6-way trailer connector. One uses the center pin as the 12-volt power accessory feed, the other uses the center pin for the brake output circuit. It sounds as if your trailer and adapter are wired differently, locking up the brakes as soon as the trailer is plugged in. The 7 to 6-way adapter, part # 47549 comes with the center pin wired up as the 12-volt lead, but it can easily be taken apart and rewired. See the picture to the right for typical...
    view full answer...
    Image 1 for
  • No Power on Right Turn/Brake Light Circuit on Jeep Wrangler Trailer Connector
    If your Jeep came with a factory installed tow package that included the trailer wiring harness/connector then it could be a fuse or relay specific to the tow package wiring. You will need to consult the vehicle owners manual to find the fuse/relay locations to check them. Also make sure that the wires are all intact at the back of the connector and that there is no corrosion inside or outside of the connector. You can also inspect the wiring and make sure there are no breaks in the wiring. If...
    view full answer...
  • Replacing 6-Way on Trailer With 7-Way Connector
    Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and trailer side 7-way trailer connector. If can you open up the existing 6-way connector on your trailer, take the housing apart and look at the terminals the wires attach to. In many cases, they will be labeled like what is shown in the FAQ article....
    view full answer...
    Image 1 for
  • Trailer Brakes Lock Up When Using the 7 Pole to 6 Pole Adapter # 47549
    The reason your brakes are locking up when you use the 7 Pole to 6 Pole Adapter, # 47549, is because there are two ways that 6-way round trailer connectors can be wired, as you may have already discovered. The difference is the pin for the electric brake output and the 12 volt power. It sounds like the 6-way connector on your trailer uses the center pin for the electric brakes. This adapter uses the center pin for 12 volt power. As you have noticed, this will apply 12 volt power to your...
    view full answer...
  • Trailer Right Turn Signal and Brake Light Not Working
    The right turn signal/brake light not working on a trailer could be the result of a bad ground, broken wire, corroded trailer connector or a blown fuse or relay on the tow vehicle's tow package wiring. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces....
    view full answer...
  • Trailer Wiring Has 5-Wires White, Yellow, Green, and 2 Browns
    If it was a 4-pin connector with 5 wires then it is called a wishbone harness and would have 2 wires attached to the running light pin so you have one wire for each side of the trailer. Typically, on a 4-Way, the white wire is ground, brown is running lights, yellow is left turn/brake lights, and green is right turn and brake lights. On a wishbone 4-Way you would have a ground wire and then you usually see a brown wire with yellow stripe for the left side running lights and a brown wire...
    view full answer...
  • Reverse Lights on Dodge Ram 2500 Series Stay On When Trailer is Connected
    The circuit that provides power to the reverse lights should be wired to the center pin on the 7-way trailer connector on your vehicle. It sounds as if you will need to do some troubleshooting to determine the cause of your problem. Check the plug on your trailer for corrosion or damage. If you find any green or white corrosion in any of the sockets on the connector, there is a good chance that the corrosion has spread to the interior of the connector, causing a short or feedback back...
    view full answer...
  • Trailer Brake Lights Not Working on a 5th Wheel Trailer
    What it could be is the tow package fuse or relay for the brake lights is blown or otherwise not working properly. You will need to check the vehicle owners manual and/or check the power distribution box lid to find the tow package fuses/relays in question. Add or replace the offending part and test it again. If that was the problem and it blows again then there is a short somewhere, most likely a bad ground which could be where the two connectors come together or at the trailer tail lights.
    view full answer...
  • Troubleshooting Right Side Turn Signal Not Working On Trailer
    This sounds like a ground problem on the right side. The turn signal not working makes sense because with the brake lights, there is a constant signal coming through which is enough to make the lights illuminate on both sides like they should. But the on/off of a turn signal does not offer enough consistent voltage and makes the problem apparent. On the vehicle, check to see if there is a turn signal fuse for the tow package wiring that may have blown. You can use your owners manual to...
    view full answer...
  • How Do I Convert my 4-Way to a 6-Way Round on a Toyota Tacoma
    In order to convert the 4-way on your Toyota Tacoma to a 6-way round connector you will need a Brake Controller 6 and 4 Way Installation Kit # ETBC6. I attached installation instructions for this product for you to check out also.
    view full answer...
  • Installation of 6-Way Round on Camper to 7-Way Blade on 2009 Chevrolet Silverado
    There are two accepted ways of wiring a 6-way round connector. One uses the center pin as the 12-volt power accessory feed, the other uses the center pin for the brake output circuit (reverse lights). The Hopkins 7 Pole to 6 Pole Adapter, part # 47549, that you have referenced comes with the center pin wired up as the 12-volt lead, but it can easily be taken apart and rewired for the center pin to be for the reverse light circuit. To see a diagram showing how a 6-way connector is wired,...
    view full answer...
  • Problems Using 6 To 7-Way Trailer Connector Adapter
    What you are experiencing is a common problem. There are two methods of wiring a 6 to 7-way trailer connector adapter. One method uses the center pin for the 12-volt accessory power feed, the other uses the center pin for the brake output. Most adapters can be opened, and the connections swapped back and forth so that the correct circuits match up. Using a car battery, you can determine which way the 6-way on this particular trailer is wired. Make sure the trailer is disconnected from...
    view full answer...
  • Gooseneck Trailer Running Lights Stay On All the Time When Connected to Truck
    The likely culprit is a dirty or corroded connector on either the trailer or the truck. Make sure each is clean and free of corrosion inside and out. Corrosion could be causing a short between the running light circuit and the 12 volt circuit in the trailer connector. If that does not solve the issue then make sure the circuit for running lights on the truck side is in the 11 oclock position if looking at the pins. And on the trailer side make sure the running light wire is in the 1 oclock...
    view full answer...
  • Trailer Connected to 2012 Ram 2500 Causes Truck Reverse Lights to Come On
    The center pin on your 2012 Ram 2500 is probably wired to the reverse lights. The center pin on the trailer is probably wired to a trailer mounted battery or breakaway system battery and it is back feeding to the trucks reverse lights. The trailer could have more than 1 battery on it. What you will need to do is figure out what is wired to that center pin on the trailer side. I have included a picture that shows the pin out functions of a vehicle side and trailer side 7-Way that should...
    view full answer...
    Image 1 for
  • Troubleshooting Trailer Brake & Turn Signal No Longer Working While Running Lights Work 2015 Arcadia
    Sounds like you maybe have a blown relay or fuse. I would start there. The right and left trailer stop and turn signals should be right next to each other according to the diagram in your owner's manual. I have linked both the HID and Halogen models fuse box layouts to this page for your convenience. If you continue to have issues after this just let me know, I would be more than happy to help you continue to troubleshoot this issue.
    view full answer...
    Image 1 for Image 2 for
  • How to Connect a Trailer with a 6-way Connector to a Ford F-350 with 7-way Trailer Connector
    To connect your trailer that has a 6-way trailer connector to your Ford F-350 that has a 7-way connector you will need an adapter, part # 47549.
    view full answer...
  • Troublehsooting Trailer Lights that Only Turn Signals Work Intermittently
    Not having a circuit on the middle pin will not harm anything. It's normally for reverse lights and I'm guessing the trailer doesn't have any. A loose or weak ground is likely your problem. Since the trailer has been sitting for so long, and there was corrosion in the connector, there's a very good chance you'll find more. I would start by checking the grounds for each light and make sure their going to a good, clean, metal surface. Inspect the mounting studs if the lights ground through...
    view full answer...
  • Using Tekonsha Prodigy RF Brake Controller with Motorhome that has 6-Way Connector
    As long as you have a fully functional 7-Way connector installed on your tow vehicle, I recommend using an adapter like the Hopkins Universal Adapter # 47549. This will convert the 7-pole plug on your vehicle down to a 6-pole plug to fit your motorhome's connector. We have verified with Tekonsha that using an adapter like this with the RF Brake Controller will work great. This will be much easier than replacing the 6-Way on your motorhome with a 7-Way connector. I have attached a short...
    view full answer...
  • Recommendation for Connecting Vehicle with 7-Way to Trailer with 6-Way Connector
    To connect your truck's 7-Way to your trailer's 6-Way connector, I simply recommend using the Hopkins Universal Adapter # 47549. This adapter will plug right into your truck's 7-Way connector to provide a 6-Way to fit your trailer's existing connector. Note that the center pin on this adapter is set up as the hot lead but it can easily be changed if your trailer's center pin is wired for the brakes. I have attached a short video demonstration on this product that you can also check out.
    view full answer...
  • Wiring Diagram to Use When Installing 7-Way # 47549
    Sounds like your trailer has the RV standard type of wiring like what you see in the middle of the picture I attached. Since you are missing the blue wire that would indicate you probably don't have trailer brakes. You can verify the functions of your trailer wiring by using a jumper wire from a 12 volt battery to determine what each of the functions is of the wires you have. The white wire might spark as it should be the ground so be careful.
    view full answer...
    Image 1 for
  • Troubleshooting Trailer Right Turn Signal Issue
    Most trailer wiring issues are caused by corrosion on trailer wiring pins. This can easily be fixed by sanding the pins with some sandpaper to remove the corrosion. I also attached a link to a help article on trailer wiring troubleshooting for you to check out as well.
    view full answer...
  • Why Would Trailer Right Blinker Stop Working When Head Lights are On
    Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. What you described is the classic insufficient ground scenario so finding a way to improve the grounds will fix the problem.
    view full answer...

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