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6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends)

6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends)

Item # 37995
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Trailer Wiring
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Hopkins Trailer Wiring - 37995
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Great Prices for the best trailer wiring from Hopkins. 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends) part number 37995 can be ordered online at or call 1-800-940-8924 for expert service.
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Hopkins Trailer Wiring - 37995

  • Wiring Adapters
  • Single-Function Adapter
  • 6 Square
  • Plug and Lead
  • 0 - 5 Feet Long
  • 6 Square
  • Hopkins

6-Pole square trailer wiring connector kit

  • Square design 6-pole
  • Includes both male and female ends for car and trailer
    • Wire leads on each trailer and vehicle end measures 11-3/4"
    • Pigtail wires are 18 gauge

TAP # 37995 / Hopkins # 47995

47995 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends)

California residents: click here

Video of 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends)

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

Video Transcript for Hopkins Wiring - Wiring Adapters - 37995 Review

Today we're going to review part number 37995, this is the Hopkins 6-Pole Square Trailer Wiring Connector Kit. You can see it has the square design 6-Pole on both connectors. It includes the male end, the male end is what would go on the trailer and includes the female end, 6-square end, which will go on to the vehicle. Basically the pigtail wires on each, they use an 18 gauge size wire. The length, give you an idea of the length on these, got a 12 inch ruler and basically you can see that you're about 12 inches in length on each one. Now basically what you would do is this one here, with the female end, this would connect to the vehicle, the tow vehicle, so you'd wire this in with the pigtail wires. This end, with the male ends, would go to the trailer, and again you'd wire those in.

Then basically all you would have to do is push that together, just like that, and you would have the six way connector. That should do it for the review on part number 37995, the Hopkins 6-Pole Square Trailer Wiring Connector Kit. .

Customer Satisfaction Score:

Customer Reviews

6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends) - 37995

Average Customer Rating:  4.9 out of 5 stars   (169 Customer Reviews)


Bullet-proof connector, if not the most elegant.

Used in my case for custom "adventurization" wiring on my 2007 BMW F800ST motorcycle, now just road tested this late summer - early fall 2017 on a three month, 18,000 mile loop out of Chicago through the Arctic & Pacific Northwest, including the Dempster & Dalton Highways.

Had a custom wiring harness that had to be able to be removed in order to get at the engine, hence the need for the connectors.

A few photos should be attached.


This is a product that I needed for my project, but was not easily found and available. not only had the product, but had it at a great price. Shipping was very fast and free for the amount I ordered. Overall, this was a great shopping experience. I made a bulk order of 16 as I am manufacturing trailers that are towed behind motorcycles. This product gives me the six conductors that I need in a very small package, which is great due to the size of motorcycles compared to cars or trucks. The only thing that could be improved with this product would be if they came with dust caps for each connector, or at least one for the vehicle side to prevent dust and moisture intrusion while the trailer is not in use. Keep up the excellent service and selection.


The wiring kit I ordered has been a very hard to find item in the past. Luckily, I found it on etrailer, & it was identical to what my camper came with from the factory! Waiting & delivery was minimal, & I'll gladly order from them again.


Very convenient and quick delivery. Exactly what I ordered. Thx. Kathy


I needed to add a more convenient location to plug and unplug my backup camera on my 2015 Chevy. The camera harness was a 6-wire harness and this 6-way plug was just what I needed. Works perfectly.


Works for my Arctic Fox truck camper.
battery feed line is small gauge(14) and if your drawing a lot of power from the truck this wire will easily be overloaded and melt. Run a separate wire if you need more than a few amps out of the truck.


I have a Coleman popup trailer w/ a 6-wire harness (no brakes). After receiving the Hopkins 6-wire plugs from eTrailer, I was able to create a conversion cable to "jump" my 4-wire tow vehicle plug lead to the 6-wire trailer plug. It works very well and I will be ordering other items from eTrailer.

Tom N.


Product works well and was just what was needed


This product replaces several of types of connectors, e.g., cinch-jones and other 6 wire types. It will be used to connect model railroad show modules. I was looking for a reasonably rapid insertion and disconnect and good conductivity. Power is low power DC, so the wire is more than adequate. I also needed a reasonable drop so as not to strain the terminal strip (barrier) connection. These, I believe, will work well. I hope this helps.

Richard B.


The connector sets I purchased are for inter modular connection on a mobile model railroad. They are working very well. I would hope you might make a connector with more pins, e.g., 8 or possibly 10. I realize the trailer application requires only 6, but the ledger ones might find other applications.


It fit the trailer harnes great a little tight but it won't come off . It took a while to. figure out the bike


Product was what I ordered. It came when it arrived I used it for its intended purpose. It operated as it should


Worked excellant to get the running lights and stop lights working on a motorcycle trike conversion.


Did not use this as a trailer connector. I had to have a way to plug and unplug another device. This worked perfectly. The wires were long enough to stagger the splices and allow for a smaller diameter splice. Overall an excellent product.



The device I used this on is now installed permanently and no longer need to plug and unplug for relocation., The connector worked perfectly and never showed any signs of corrosion on the connectors even though it was exposed to the elements.


Arrived promptly. Works like a charm. Exactly what I needed.


Part came in as described. Was a perfect fit for my needs. Has worked very well. One small problem which we overcame is that the connector is very hard to totally connect and even harder to disconnect when the winter is over. The use of channel lock pliers took care of the problem. Being hard made them more water resistant which was a plus.


I’ve looked the connector over but haven’t installed it yet. It is a high quality item and I’m sure it will work as designed!


I had great difficulty finding this 6-pin "Square" connector elsewhere. I was pleased that etrailer had it and the price was excellent. Delivery was prompt and the part was as advertised.

My only complaint is that the wiring "color code" did not match what I expected from the existing connector on my camper and other wiring diagrams that I had seen. This caused some minor problems initially. Though, I was able to work through it.

I'd certainly use etrailer again for similar part needs.


This was exactly what I needed for a non-trailer application. I used a pair of these connectors for my antenna rotator wire connections so that I could disconnect them when I was moving the setup. The gauge of the stranded wire is substantial and easy to work with when stripping to make connections. Using it both under screws and soldering to other cables was easy. Color-coding matched the current cables. The two connectors might use a bit of light lubrication to more easy push together and pull apart.


Great FAST service and fortunately it was the correct size I needed.. bought the camper used with just pigtail.. Not quite as heavy of wiring I would like as my truck and camper are larger.. #10 or #8 on the power wires would be nice!
But for the price and it serves the tail lights well.. a fair deal... will be buying a decent 7 pin 10' jumper and do it right!


I bought a motorcycle pull cart to pull behind our Miata. I looked all over Madison to find the right connection pieces. After being told it could not be done, I brought up your web site and found exactly what I needed. Your web site even had a video that I watched and learned from. Now I can travel Route 66 knowing my trailer lights will be working all the way to California and back. Thanks for the great product selection you offer and the efficient way the web site works in the ordering process.


This plug is hard to find, and of course etrailer handles it. Needless to say, I'm glad they handle it!!! Shipped quick and it was exactly as advertised. You can get the half of the plug I needed on Amazon for three times the cost of both halves at etrailer.



I recently needed a simple trailer plug for a motorcycle. I shopped for the product at a couple of major stores and could not find a six prong connector. I could have kept looking and probably found it but I went to and found it cheaper even with shipping than I could have bought it locally. Thanks etrailer



Arrived in a timely manner. Ordered at the end of one weekend and it arrived well in advanced of the next. Product will be used as an in-between from my pickup and it's cap (topper). I have a few extra lights and electrical accessories that need to be disconnected when the cap is removed. This one plug makes it simple.


Sorry I took so long to respond to your request on a survey that plug you sent me fit my camper perfectly I thank you so much I've been searching high and low until I found use kind people I'm looking for a transformer for my 1979 pop up Coleman Camper Brandywine my Transformer started to smoke and Buzz real loud I had to unplug it if you can find me a Transformer would you please let me know thank you very much everything is well appreciated have a nice day hope to hear from you soon


I had lost the the connector to my pop up trailer. It is a square fitting. I looked everywhere and only found one and they wanted $45.00. Everyone uses flat fittings now. Then I found etrailer just $ 14.00 and that included shipping.


I use these not for trailers but for hooking up multiconductor cables on ham radio antenna rotors. They work well. Use dielectric grease on them. They last well and are easy to plug and unplug.

Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • Troubleshooting Flashing Trailer Lights After Replacing 6-way with 4-Way
    It sounds like you wired up your new 4-way wrong. What you will want to do is use a 12-volt battery and jumper wire to test all of the wires of your trailer so you can determine their function and then wire up the trailer to your new 4-way according. The white wire of your 4-way will be the ground, brown will be running lights, the yellow will be left turn/brake, and the green right turn/brake.
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  • 6-Way Trailer Wiring Harness on an Escapade Trailer Towed by a Motorcycle
    The red wire should be brake lights and the black wire 12 volt power. But since there is no standard for wire color, it could be the other way around. The best way to determine the functions of the wires on the bike side would be to use a circuit tester such as # 3808. After you verify the functions on the bike side you can trace the wires from the trailer connector to where they terminate on the trailer to determine its functions. From what I have learned there is a power wire on the...
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  • Trailer Hitch Wiring Recommendation for a 1998 Jayco Pop-Up Trailer
    Yes, you could use the 6-Pole Square Trailer Wiring Connector Kit # 37995 on your 1998 Jayco Pop-Up trailer.
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  • Is 6-Pole Square Trailer Wiring Connector Kit # 37995 Same As Older Style 6-Way Square Connector
    The 6-Pole Square Trailer Wiring Connector Kit # 37995 that you referenced is the standard 6-way square connector that has been used on campers for several years. It would be the same style of connector you have already so this would work as a replacement.
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  • 6-Way Motorcycle Trailer Connector that Doesn't Require Mounting
    How does a 6-way SQUARE sound? Based on what you described the part # 37995 would be your best option as it comes with both sides of a 6-way connector that neither require mounting permanently to the motorcycle or trailer. The reason I recommended this is that there are no 6-way flat connectors and the round ones are designed to be mounted on the vehicle side. I attached a review video for this for you to check out as well.
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  • Replacement 6-Way Square Connectors for a Jayco Pop Up Camper
    Sounds like you are looking for the part # 37995. This is a pair of 6-way connectors that Jayco uses on their pop-ups.
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  • Replacement 6-Way Square Connector Recommendations for a Trailer
    For a set of replacement 6-way square connectors you would want the part # 37995. This part number comes with both the trailer and the vehicle side connectors so you would have a spare for your vehicle as well. I attached a review video for you to check out as well.
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  • Replacement Square 6-Pin Connector With Pigtail For Camper
    The only square 6-pin connectors with a pigtail we have is the 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends) # 37995. This comes with both the trailer and vehicle end but you can discard the vehicle end if you aren't going to use it (the trailer end is not sold individually). You will not use colors to match up though, you will need to test your wires for function.
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  • Replacing 6-Way Square Connector on Jayco Trailer and Using Adapter # 30104
    The Jayco 6-Way square connector is unique to those trailers and # 37995 wouldn't be a good fit for adapter # 30104. But, it you were to order # 37995 any way you could use it by replacing the 6-Way end on # 30104 with the vehicle side 6-Way that comes with # 37995.
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  • Difficulty Fitting Male And Female Sides Of 6-Way Square Adapter Together
    The first thing I recommend is to make sure the pins on the # 37995 are not bent and they align before connecting the two harnesses together. If it seems excessively tight or difficult to connect I recommend using some dielectric grease like part # 11755. This may provide enough lubrication to allow these two connectors to slip together a bit easier.
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  • 7-Way Trailer Connector for a Truck that has a 4-Way Flat Connector
    Are you sure it is a 6-Way and not a 7-Way blade style such as # 37185? The center counts as a pin. I have not heard of a 6-Way blade style connector, not to say that it doesn't exist but I haven't seen one myself. There might also be a way to add a 7-Way to the truck without having to cut or splice anything. If you can tell me the year, make, and model of the truck I can determine if there is a 7-Way that will work other than a hardwire option.
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  • Is there a Replacement Junction Box for a 1997 Dutchman Aristocrat
    We have numerous junction boxes but if you are talking about the transfer switch/fuse panel then we do not have those types of parts and you would need to speak with the trailer manufacturer for a recommendation. If it is just a regular junction box such as # 38656 then we do have those. I have included a link to them below for you.
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  • Parts Needed to Connect Vehicle with 4-Pole to Trailer with 6-Way and Separate Brake Lights
    Since your vehicle's 4-pole wiring harness uses stop and turn signals that are combined on one wire, the green and yellow wires, you will use Vehicle to Vehicle Tail Light Converter # 118158 which takes in those combined signals and separates them out onto individual wires at its output side. Your Brown running light wire will simple bypass the converter and go directly to the trailer connector. Rather than use adapters to connect the tow vehicle and trailer I suggest you wire in a matching...
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  • Is the 6-Pole Square Trailer Wiring Connector Kit Water Proof
    I wouldn't say that the 6-Pole Square Trailer Wiring Connector Kit # 37995 is water proof. It is weather resistant. If submerged for long enough water could still get to the pins. That is why we recommend using dielectric grease such as # LT37534 on electrical connections to repel moisture.
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  • Six Pole Trailer Connector Vehicle and Trailer Ends for a 1995 Coleman Pop Up Camper
    The Curt 6-Pole square wiring connector loop # C58034 is only available in the 12 inch length. It should work with your 1995 Coleman pup. The Jayco square plug was the one oddball and if you had a Jayco this harness likely would not work properly but for a Coleman it should be fine. We also have # 37995 which is a trailer and vehicle end. The wires on it are 11-3/4 inches long for each side for a total of 23-1/2 inches.
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  • Adding a 4-Way Trailer Connector to the Back of a Honda Goldwing
    The trailer connector on your Honda Goldwing is set up for a trailer with separate circuits meaning brake lights and turn signals are on different circuits. The trailer that you have has combined circuits; the brake lights and turn signals are on the same circuit. So all you will need is a separate to combined converter with a 4-Way flat connector such as # 119178KIT. On it, the white wire is ground, red connects to a brake light wire, brown connects to a tail light wire, yellow connects...
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  • How to Make a 7-Way to 6-Way Square Jayco Trailer Connector Adapter
    Yes, the Jayco trailers use a very unique wiring on their trailers. There is no adapter available that will go from a 7-Way vehicle side connector to a 6-Way square Jayco connector. You will need to make one using the follow parts: 7-Way trailer connector # H20042 6-Pole Square Trailer Wiring Connector Kit, # 37995 Start by identifying the wire functions of the trailer side connector so that it will be easier to wire in the 7-Way later. Connect the 7-Way wires on H20042 to the vehicle...
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  • How To Replace 6-way Square Connector On Trailer With 4-way Flat Connector
    I would be happy to help you replace the 6-way square connector on your pop-up camper with a 4-way connector, but you will need to use a circuit tester like # PTW2993 to confirm the functions of the wiring on your trailer as colors are not standardized with trailer manufacturers. The 4-way connector you have has the following functions: White is the ground Brown is the tail light/running lights Green is the passenger side turn signal/ brake lights Yellow is the driver side turn signal/brake...
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  • Replacement 6-Pin Square Trailer Wiring Connector With Snap In Male Housing
    The 6-Pole Square Trailer Wiring Connector Kit # 37995 is the only 6-pin style connectors we have similar to your connector. I know this type of connector was commonly used on a lot of Jayco RV's. You may be able to find a good used connector at an RV salvage yard as I do not see this exact connector listed in any of the online Jayco parts catalogs I found.
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  • Running Lights Do Not Work on Yakima Rack and Roll Trailer Pulled with a 2008 Saturn Vue
    The first step I would take is to check the vehicle side and trailer side connectors for any corrosion or dirt build up that could cause a bad connection and clean it out. If the connectors look clean, then you should use a circuit tester, # PTW2993, to check the trailer connector on the back of your 2008 Saturn Vue. Make sure you are getting a signal at each pin when that function is activated. I have attached a video of my co-worker testing a 4-flat trailer connector for you to reference....
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  • Installing Square 6-Way Trailer Connector On 2009 Ford Flex To Match Trailer Wiring
    If your trailer has a square 6-way connector I assume it has brakes. The other wire would perhaps be for a breakaway kit or interior lights on the trailer or a battery charger. If the trailer is setup with either of those functions, you will need to change the 4-way on your 2009 Flex to match the trailer. I recommend part # 37995. This has the trailer and vehicle side 6-way square connectors. You would need to remove the 4-way connector on your Flex and wire those wires to the 6-way....
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  • Making a 6-Way Square to 4-Way Flat Trailer Wiring Adapter for a Motorcycle and Trailer
    Your question is perfectly clear, and it is one that has come up before. Putting a 4-Way flat on the trailer is easy enough. You can use a trailer side 4-Way and splice it to the existing trailer wiring by function. The adapter for the 6-Way square to 4-Way flat is going to require a little more work. I recommend starting with the 6-Pole Square Trailer Wiring Connector Kit, # 37995. You will need the end that plugs into the vehicle side to make an adapter. You can then use Quick FixTM...
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  • Solution for Trailer with 6-Way Square Connector to Be Towed by Truck with 7-Way
    The only solution we are going to be able to provide for you is to build an adapter like you mentioned or do what most people do and replace the connector you have on your trailer with a standard 7-way so that it will work with your truck and most other tow vehicles out there. The square 6-way you have is pretty uncommon and typically comes with an adapter from the trailer manufacturer to attach to a 7-way, but in your case I would just remove it and install a # H20046 in its place so that...
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    Image 1 for Image 2 for
  • Connecting a Coachman Pop-Up Trialer with 6-Way Square Connector to a Vehicle with a 7-Way RV
    To use your trailer with a vehicle that has a 7-Way connector installed on it you would be best suited to just use the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End, item # PK12706, and hard wire it directly to the wires on the trailer. You will then have the functionality needed to provide power to the trailer brakes and have power to maintain a battery on the trailer if it is so equipped. Another advantage is that you will have no need for an adapter between...
    view full answer...

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