Lowest Prices for the best Wiring from Hopkins. 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends) part number 37995 can be ordered online at etrailer.com or call 800-298-8924 for expert service.

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Wiring > Wiring Adapters > Single-Function Adapter > 6 Square > 6 Square > Plug and Lead > 1 Foot Long > Hopkins

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

Hopkins Wiring

(30 reviews)

Code:   37995


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Shipping Weight: 0.22 pounds


Hopkins Wiring - 37995

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)

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 Demo Hopkins Wiring 37995
Hopkins Wiring 37995 Review

Video Transcript for Hopkins Wiring 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 Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (30 Customer Reviews)

- 37995

by: Richard B.08/11/2013

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. 94467


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.

Richard B - 08/13/2014


- 37995

by: Dan D.08/11/2014

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 etrailer.com and found it cheaper even with shipping than I could have bought it locally. Thanks etrailer Dan 146062

- 37995

by: Chuck04/23/2014

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. 126736

- 37995

by: JIMM07/08/2011

I odered several items so I could use my camper trailer with my new truck including a connector kit, a 7 blade connector, and a ball mount and ball. i recieved them fairly quickly all in all and in good shape. The items were all excellent quality,well priced and will do the job I need done 18965

- 37995

by: Rick R10/23/2013

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. Thanks.........Rick 104839

- 37995

by: Eric K11/20/2013

Perfect product. Upon arrival, realized it was exactly what I wanted. Perfect device for hooking up unique lights. I used it to wire lights with separate turn signals and reverse lights. Can't wait to get them wired up and functioning. Thanks etrailer. Eric 107941

- 37995

by: Douglas04/24/2013

Just what I ordered, delivered very fast, and the communication and professionalism after placing the order is the best. It is a joy to do business with e-trailer and I recommend the company every chance I get. 77633

- 37995

by: Scott B09/06/2013

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. 98702

- 37995

by: Ted C.09/15/2013

As pictured, and a fair price. Arrived quickly and in good condition. I ordered this in error for my application. I will be able to make use of this in the future, however. 100030

- 37995

by: Frank08/05/2014

The plugs are exactly what I've been long searching for, to match the old ones on my two trailers. Nobody but eTrailer seems to carry them. Quality looks excellent, too. 144449

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by: Michael02/07/2013

Product quality was excellent. Vendor processed order without delay and made prompt delivery. I would recommend etairler to anyone in the market for trailer parts. 65222

- 37995

by: JB04/09/2014

I can not say enough good about the price, quality, and timely order fulfilment that etrailer provides, I would not hesitatate to recommend etrailer to anyone. 124390

- 37995

by: Curtis G.05/17/2011

Good products at a good price, web site was easy to navigate, shipping to my address was very expediant. Very satisfied with overall purchase 14584

- 37995

by: Andrew Smith01/23/2015

Best connector to use for a 5/6 wire trailer where the plug-in is open to the elements. 170941

- 37995

by: Bob Wrobel02/21/2011

Quick response to order and delivered on time. Can't ask for much more. Thanks 7527

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by: gene05/10/2011

recieved in good shape and worked great for my snow plow lights thks 13178

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by: Ed L.08/06/2013

Just what I needed in a timely fashion. Great product. Thanks. 93657

- 37995

by: gitrdonedave08/27/2014

the product works perfectly and was very simple to install 149005

- 37995

by: Monica07/27/2011

The product came quickly and was exactly as advertised. 20367

- 37995

by: A. Steward07/11/2013

Simple intructions, easy to install. Great product. 88936

- 37995

by: Lowell07/22/2011

Delivered quickly exactly as advertised. No problems. 19852

- 37995

by: John M01/20/2015

Connectors look great and snap together tightly. 170460

- 37995

by: John P.08/15/2013

Product as described. Speedy delivery. Thanks 95181

- 37995

by: Khanp03/31/2014

Deliver on time , fulfill my expectatio ns. 122920

- 37995

by: David M.12/13/2012

Good product...Does what we expect. 61295

- 37995

by: Carl08/30/2013

As described. Have not yet used. 97590

- 37995

by: Ed L08/23/2013


- 37995

by: Mike B.03/07/2014

Good overall quality 119771

- 37995

by: Gary01/16/2013

Just what I needed 63269

- 37995

by: Michael S03/16/2015

Very good 178795


Ask the Experts about this Hopkins Wiring
Do you have a question about this Wiring?

  • How to Make a 6-Way Square to 4-Way Flat Trailer Wiring Adapter
  • The 6-Way square trailer connector is not used by a lot of trailer manufacturers. A lot of Jayco trailers may have them but mostly you come across the 4-Way flat, like what you have on your trailer, and the 7-Way blade for RV applications. What I recommend is to convert the 6-Pole on the Monaco to a 4-Way. You can do this very easily by removing the 6-Way plug, and then testing the wires for function using a circuit tester like # 3808 if needed before installing them in a new 4-Way,...
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  • 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...
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  • How to Make a 7-Way to 6-Way Square Jayco Trailer Connector Adapter
  • 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 side connector in # 37995 based on function. On the H20042: the...
    view full answer...

  • 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...
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  • Installing a Brake Controller on a 2010 Hyundai Santa Fe with Factory Tow Package
  • To install the Tekonsha brake controller on your 2010 Hyundai Santa Fe, you will first need a 4-Way trailer connector if you do not already have one. The Tow Ready Custom Fit Vehicle Wiring, # 118258, that you have referenced will fit your Santa Fe if the Hyundai Santa Fe came with Factory Tow Package. If it did not, then use harness # 118415. I have included a link to the installation details below. I recommend switching the plug on the trailer from a 6-Square to a 7-Way. You can use...
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  • Adding a Trailer Wiring Harness to a 2002 Dodge Durango to Tow a 1996 Jayco Trailer
  • We can get you set up to tow your Jayco trailer with the 6-Way connector. First, on your 2002 Dodge Durango, you will need to install Tow Ready Custom Fit Vehicle Wiring, # 118334. I have included a link to the installation details and a link to a video showing a typical installation for you to view. The 6-Way square plug is a rarity. What I recommend is replacing the 6-Way on the trailer with a 7-Way RV style connector. It will be fairly simple. You will just need a 7-Way connector,...
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  • Adapting a 6-Way Trailer Connector to a 6-Way Square Connector
  • Your best bet would be to remove the square connector on the camper and replace it with a 6-way connector, item # PK11604, to correspond with the connector on your truck. If you do not wish to do this, you could fabricate an adapter using a 6-Way Trailer End Connector, part # PK11604 and a 6-Pole Square Trailer Wiring Connector Kit, part # 37995. You will want to make sure to wire the connector so that the vehicle and trailer side are wired identically. LOCATE WIRES BY FUNCTION ONLY White...
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  • 6 way square to 4 way flat connection not working on 1997 Dutchman Pop-UP Tent Trailer
  • As long as your vehicle is wired properly, Green right turn and stop, Yellow left turn and stop, Brown running lights and White ground, then you will have to figure out how the trailer is wired. If the adapter you are talking about was purchased and not hard wired then it could be the 4-way flat to 6-way square adapter for a Jayco RV, item # 30104, and those adapters are wired differently than most other trailers with 6-way connectors and this could be why your lights are not functioning...
    view full answer...

  • How To Wire 6-Way Square Connector on 2000 Viking Popup to 2001 Mazda Tribute With 4-Way Flat
  • I do have a few solutions to wire your 2000 Viking with 6-way Square to your 2001 Mazda Tribute 4-Way flat. The first option would be to cut off the 6-way connector on your Viking Popup Camper, and wire in a 4-way connector by function. You will want to use Hopkins Endurance 4-Way Flat Trailer Connector - Trailer End - Ergonomic Design. part # HM48110. To wire, you will want to wire the labeled color wire on part # HM48110 to the matching wires on your trailer. Another option would...
    view full answer...

  • Where To Connect 2 Extra Wires From 6-Way Connector On Motorcycle Trailer To 4 Wires On Motorcycle
  • I looked up the Escapade motorcycle trailer and it showed the six wire colors as being: White - Ground Brown - Taillights Yellow - Left Turn Green - Right Turn Red - Brake Circuit Black - Accessory Terminal on Bike You will want to use a circuit tester like the Quickee Tester, part # 3808, and test the function of the four wires on your motorcycle. They will most likely be ground, taillights, left turn/brake, and right turn/brake. You will want to wire the black wire on the...
    view full answer...

  • Adapter to Go from 6-Way Square on Tow Vehicle to 4-Way Flat Trailer Side Connector
  • It sound like you want the opposite of adapter # 30104. That would mean your tow vehicle has a 6-Way square connector. What you can do is use # 37995 which has both the vehicle end and trailer ends. On the trailer end, you can wire the loose wires to a vehicle side 4-Way, # HM48190. Then you will have a 6-Way square to 4-Way flat adapter. The other option is to just replace the 4-Way flat on the trailer with the trailer end 6-Way that comes with # 37995.
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  • Does Hidden Hitch 4-Way Flat to 6-Way Square Wiring Adapter # 30104 Work Only on Jayco Trailers
  • The Hidden Hitch 4-Way Flat to 6-Way Square Wiring Adapter, part # 30104, is intended specifically for Jayco trailers that use the 6-way square type connector. The adapter is wired to transfer tow vehicle lighting signals to the appropriate pins on the 6-way square connector to operate Jayco camper lights. For connecting your vintage Bethany camper to your tow vehicle with 4-pole flat connector you can fabricate an adapter harness from two parts. You will need to order parts # 37995...
    view full answer...

  • Connecting 6-Pin Square Connector on Harley Bike to 5-Pin Round Connector on Trailer
  • If the 6-pin square connector is the factory connector on your Harley I would recommend keeping the 6-pin and using the Hopkins 6-Pole Square Trailer Wiring Connector Kit, part # 37995 you have referenced and plug the trailer end connector in the kit into your 6-pin square on your Harley. Then, wire the pigtail wires on the other end of the trailer end connector to the Pollak 5-Pole, Round Pin Trailer Wiring Socket, part # PK11502. You will need to use a circuit tester like the Quickee...
    view full answer...

  • Converting a Trailer with a 6 Square Connector to a 4-Way Flat Trailer Connector
  • If the trailer is a Jayco trailer, you will just need Adapter # 30104, to go from the 4-Way flat on the 2006 Honda Odyssey to the 6 square on the trailer. If the trailer is a different brand, this adapter will not work. Instead, you will need to convert one of the connectors to be compatible with the other. If you convert the trailer, the other 2 functions on it will be lost unless you converted it back again. If you converted the vehicle, it will only be compatible with trailers that...
    view full answer...

  • Converting 6-Way Square to 4-Way Flat on a Honda Odyssey
  • There are a number of wiring situations for the 6-Way square connector. Your trailer may have a battery, trailer brakes and/or backup lights, along with the tail lights, left stop and turn light, right stop and turn light and ground wire. You said your trailer has a battery. If the battery circuit was somehow connected to the vehicle lighting circuits, you may have damaged the converter attached to the trailer wiring harness that switches the Odyssey 3 wire system down to the trailers...
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  • Troubleshooting Left Turn Signal on Dutchman Duck Pop-Up Camper
  • The Jayco Adapter you mention, part # 30104 will only work with Jayco campers. It sounds as if you have two separate issues going on. The issue with all of the lights flashing is caused by an insufficient ground connection. Check the ground connection for the trailer connector on the tow vehicle, make sure it is connected securely to non-corroded metal. The camper itself will also have a ground connection, usually on the trailer tongue. Follow the white wire back toward the camper from...
    view full answer...

  • Trailer Wiring Adapter for a 2012 Harley Trike To Tow an Escapade Motorcycle Trailer
  • I did some research and found that the Escapade trailers use a square 6-Way like # 37995 that you have referenced. From what I could find, the Harley trikes use a round 5-Way. No matter what is on the bike you will need to change one connector or the other. If it is easier to change the trailer side, you will just need to use a trailer side 5-Way that matches the bike 5-Way. If it is round, we have # PK11501. You will need to remove the plug on the trailer and attach the wires from...
    view full answer...

  • Wiring a Camper with Combined Brake and Turn Signals to a 2003 Chevy Silverado
  • Trailers and campers typically have what is called a 2 wire system: the brake lights and turn signals on each side are combined. Even though many vehicles have turn signals that are separate from the brake lights, the tow package wiring on the vehicles is already converted. If you are trying to tap into the vehicle wires and not a trailer connector then that would be what the problem is. You would need to use a converter, # RM-732, to take the separate turn signals from the truck and...
    view full answer...

  • Wiring a 6-way Jayco Connector on a 2004 Hyundia Santa Fe
  • The Adapter 4-Way Flat to 6-Way Square for Jayco, item # 30104, will work with your Jayco trailer but you will not have power for your auxillary connection or your trailer brakes. One option for you to have power to all of your trailers electrical functions is to use the 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends), item # 37995, and splice into your vehicles 4-way wiring for the taillights and hard wire the two remaining circuits. If you have two vehicles that...
    view full answer...

  • 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, # 40376, 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....
    view full answer...

  • Adapter for Jeep Grand Cherokee 6-Pole to 7-Pole
  • We do not have an adapter that will work, but we do have the parts to make your own. This will allow you to plug in your square 6-Way trailer connector to the round 7-Way vehicle connector. You will need to purchase two parts to make this work for your Jeep Grand Cherokee. First you will need the 6-Pole Square Trailer Wiring Connector Kit, product number 37995. You will be able to split this item, and wire it to work with the 7-Way Trailer Connector, either metal, item PK12702,...
    view full answer...

  • Availability of a 7-Way to 6-Pole Square Adapter for a 2008 Dodge Nitro
  • I am sorry but at this time a 7-Way to 6 Pole square adapter is not available. You do have 2 options though. You could rewire the trailer connector to a Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End, item # PK12706, using a circuit tester to verify each connection that needs to be made. You could also build your own adapter to go between your vehicle and trailer. Use the 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends), item # 37995, and...
    view full answer...

  • Adapting 6-Pole Square RV Connector to 4-Pole Flat Connector for Use With MaxxTow Lights # MT70097
  • There is no plug-in adapter available to mate a 6-pole square RV connector directly to a 4-pole flat connector, but we do offer a 6-Pole Square Trailer Wiring Connector Kit, part # 37995, that can work for you as long as you do not have a Jayco RV (which can have compatibility issues with this part). Hopkins Connector Kit # 37995 includes both male and female connectors. You can cut off the 4-pole flat connector from the MaxxTow Magnetic Light Kit and splice in the male 6-pole connector...
    view full answer...

  • Troubleshooting 4-way Wiring on a 2001 Ford F-150 and 6-way Wiring on a 1989 Jayco J Series Trailer
  • I would suggest checking all the fuses on your vehicle and make sure they are in proper working order. Then using a circuit tester like the Quickee # 3808 to test the signal at the truck 4-way and make sure that the trailer is getting the proper signal when the functions are activated. If you are not getting the proper signal from the 4-way a replacement kit for your truck would be Curt # C55256. This wiring harness is a T-one style that plugs directly into your OEM wiring harness. If...
    view full answer...

  • 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.
    view full answer...

  • Finding a Reverse Light Wire to Tap Into on a 2014 Hyundai Santa Fe for Trailer with Surge Brakes
  • You will need to add a 4-Way to 7-Way adapter such as # 37185. The 4-Way will plug right into this adapter. Then you will ground the white wire to the frame. The blue wire you will not need since the trailer has a surge coupler. The black wire is for 12 volt power which you may or may not need. And the purple wire is for the reverse lights. There are a couple of possible places you can find access to the reverse light circuit. It is possible that there is a reverse light wire bundled...
    view full answer...

  • What is the Wire Gauge on the 6-Pole Square Trailer Wiring Connector # 37995, for a 1993 Saturn SW2
  • I went out to the warehouse and grabbed one of the 6-Pole Square Trailer Wiring Connectors, item # 37995, and all of the wires are the same 18 gauge wires. I agree with you that a larger wire would be the best way to go for installation of a power wire to a trailer. The 18 gauge wiring is used to match the trailer wiring these connectors are installed on. I would change the trailer connector to match my vehicle by using a 6-Way Molded Trailer Wire Connector, item # 50-61-104, or a 7-Way...
    view full answer...

  • 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.
    view full answer...

  • 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...
    view full answer...

Info for this part was:

Photos by:
Jackie C

Expert Research:
Michael L

Expert Research:
Robert G

Expert Research:
Michael H

Expert Research:
Jeff D

Expert Research:
Jameson C

Expert Research:
John H

Expert Research:
Rachael H

Updated by:
Sarah W

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