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Adapter 4-Pole to 7-Pole and 4-Pole

Adapter 4-Pole to 7-Pole and 4-Pole

Item # 37185

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Hopkins Wiring - 37185
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Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory. Lowest Prices for the best wiring from Hopkins. Adapter 4-Pole to 7-Pole and 4-Pole part number 37185 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Hopkins Wiring - 37185

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

Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory.


Features:

  • Adapter converts from 4-pole wiring on your vehicle to 7-pole round plug and 4-pole flat wiring for trailer side
  • Adds additional wire leads for brakes, power, and accessory wiring
  • Wire functions:
    • White - ground
    • Blue - brake
    • Black - hot lead - 12 volt power supply
    • Purple - auxiliary
  • Mounting bracket included


Specs:

  • Connector measures 3" x 3"
  • Distance between vehicle mounting holes: 2-3/16"
  • 90-Day limited warranty


product detail

Wire Functions:
White: Ground
Blue: Brake
Black: "Hot" Lead - 12V power supply
Purple: Aux. - Reverse Lights etc.







47185B Adapter 4-Pole to 7-Pole and 4-Pole - Hopkins # 47185B, TAP # 37185






California residents: click here


Video of Adapter 4-Pole to 7-Pole and 4-Pole


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




Video Transcript for Trailer Wiring Harness Adapter Installation - 2013 Ford F-150

Today on our 2013 Ford F-150 Super Crew Cab we're going to be installing the Hopkins Adapter for a 4-pole to a 7-pole as well as a 4-pole, part number 37185. Now we're here at the rear of the vehicle. Now this vehicle already has a 4-way plug on it. We've already gone ahead and tested it. We know it does work. We've also lowered the spare tire down out of the way to give our self a little more working room.

We're going to be installing this 7 and 4-way plug so that this vehicle can have a brake controller as well as a 12-volt hot lead installed at a later time. We'll be installing this bracket here that holds the 7 and 4-way plug in place as well. Now we will be removing this 4-way plug out of its existing holder. Just pull it down. Go ahead and push that up behind it.

We will need to change this bracket here a little bit and we're going to go ahead and connect it right here to this factory 4-way bracket that's already welded to the bumper. We've gone ahead and put it in a vise and straightened it out. We're going to reuse the four flat factory bracket but we're going to connect this bracket to it. But in order for our wires to clear our hitch we had to straighten it out so that it could come down low enough and get the wires around the hitch. We're going to need to drill two holes, one on each side.

So we'll be using these two holes. Go ahead and take our marker put a dot at each side. Now with our holes marked we'll go ahead and take our drill bit and we'll drill out these two locations. Weve gone ahead and touched up the paint a little bit here on our brackets since the paint was a little scratched after we bent it. Go ahead and put our 7-way plug to it.

We're going to attach it to the bracket using the supplied hardware. Just a machine screw with a locking style nut. Go ahead and put all four in. Once we have installed we can go ahead and tighten everything down. Next we'll go ahead and take the hardware that comes with the kit. We're going to then attach our bracket to the factory 4-way bracket through the holes we just drilled. Then tighten that down as well. So next we're going to need to go ahead and plug our four flat wiring off of our new 7 and 4-way plug into the factory four flat. Now in order to do that we're going to need to trim some of this extra rubber off of here for it to fit properly on this plug here. To do that we'll just use a razor knife, trim back some of the rubber here. Now you can see we trimmed back a little bit of the rubber here on our 7 and 4-way plug that way it fits into our factory four flat. Now before we push this connection together we're going to fit a little bit of dielectric grease here to help protect the connection point. This is part number 11755. It's a little dielectric grease. Go ahead and add some to our plug. Go ahead and put our plug together. Go ahead and also take a zip tie, run it through just for a little extra protection to make sure that the connection point stays nice and tight. Go ahead and trim off any excess. We're going to go ahead and cut this old connection point of this old cover off. We don't need that anymore. We're going to also go ahead and wrap this connection point up with some electrical tape, make sure that it's protected from the elements as well. Next we're going to need to attach our blue and black wire off the 7-pole to the factory wiring harness. Now we're going to need to extend the wires just a little bit. Now the wiring that we'll be using is part number 10-1-1 which is just some 10-gauge wire. It doesn't matter the color but in our case we're going to be using about a two foot piece of blue wire and two foot piece of black wire just to make things stay consistent. We're also going to be using a couple butt connectors, part number 05732-2. Now we're going to need to extend the wires just a little bit, about two feet on each wire. Go ahead and take our extra piece of wire here. We'll strip some back. We'll then be connecting it here to this blue wire. Go ahead and crimp down the butt connector. Go ahead and repeat that same process for this black wire. Go ahead and take the other end of our jumpers and go ahead and add a yellow butt connector to each. Now when you come up here underneath the vehicle this right here is where the four flat wiring comes up and there's a plug right up here. Now right here you'll notice that there's other wires for our 7-way plug already here. This red wire here is for the 12-volt hot lead and this blue wire here, this little tie-in for the brake controller signal. Next we're going to loosen up this loom from the vehicle's frame by using either a large flat head screwdriver or a trim panel removal tool. We'll then go ahead and peel back some of our wire loom on the wires so we can gain access to the blue and red wire. Next we're going to go ahead and cut the red wire which is the 12-volt power supply wire in the factory wiring harness. Go ahead and cut that here. Go ahead and reach over to the blue wire and do the same thing. The blue wire is the brake control signal wire. Go ahead and trim that one. Go ahead and strip back a little bit of wire on both. We'll then take our black and our blue wire up and over the top of the frame here. We will be connecting the black wire to the red wire and the blue wire to the blue wire. Next this purple wire here on the back of the 7-way plug is for the reverse light circuit. Now we're not going to be hooking that up on this particular vehicle today so we'll just go ahead and take some electrical tape and tape it off in case if someone wants to use it in the future. It can be undone and hooked up at that time. Now the last wire is the white wire with the ring terminal on it. We'll need to route that up and ground that to the vehicle's frame. To ground it we'll go ahead and use the self-tapping screw to secure it to the vehicle's frame. Now that we have all of our connections made next we're going to go ahead and add about a foot of half inch wire loom just off the 7-way plug to help protect the wires. The wire loom that we're using is part number 459075-1 and it is sold by the foot. We're then going to add a couple zip ties to make sure the wire loom stays nice and tight. Now before we put these wires up we're going to go ahead and tape off each of the butt connectors that we added in just to give them a little bit of protection and to protect the connector from the elements. Go ahead then and bunch up our wire here, the excess and go ahead and use a little electrical tape and a couple zip ties to help secure it. Now we're up here underneath the vehicle's hood. We have the fuse box open. Now there are two additional things we'll need to add to make the 12-volt battery charge cycle of the 12-volt hot on the 7-way plug active. We'll need to add a 30-amp fuse that looks like this and that will go right here in number 21 which is right here. We'll need to add a relay to number 9 and that goes right here. Now both of these are available at your local auto parts store. We'll go ahead and add our 30-amp right there and then we can add our relay to this port right here which is number 9. You can then go ahead and close up the fuse box and you're ready to use the 12-volt hot lead on the 7-way plug. Now if you want to use the brake controller feature still with the 7-way plug you will still need to install a brake controller in the vehicle before you can activate the electric brakes on your trailer. And with that, that will do it for the installation of the Hopkins Adapter 4-pole to a 7-pole and 4-pole, part number 37185 on our 2013 Ford F-150 Super Crew Cab. .


Customer Reviews

Adapter 4-Pole to 7-Pole and 4-Pole - 37185

Average Customer Rating:  4.8 out of 5 stars   (377 Customer Reviews)

Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory.

- 37185
by:

Like the products, easy to install. 611154



- 37185
by:

I have used this trailer hitch and its wiring package without a problem. the last time I pulled a trailer it was heavy enough to slow me down to 35mph when I was going up an on ramp. my last trip was over 300 miles and had no problems 578241



- 37185
by:

Installed and connected. Used the existing grommets and cut a slit and small hole in the middle to go up through to the inside. If you take the inside grommet out on the back side Above the bumper after removing the carpet you can feed the cable down through both holes and reinstall the grommets. Mounted the ground wire on the drivers side to the metal frame on the drivers side using existing holes for the grounding wires. Used a hole drill bit to drill a hole just large enough to slide the connector in and bolted directly to the bumper not using the L bracket. Connector is flush with the bumper and used the 4 bolts provided. Took overall three hours to do it all. 643474



- 37185
by:

Another great product as always. Exactly what i needed. Thank you etrailer 600088



- 37185
by:

I use this matching unit to replace the broken cover(plug lock) parts & spring on my hard wired connection. It's a good product unless/until the plastic hinge breaks(especially if one backs into something). It's less costly to strip/swap parts than a new plug + rewiring. Just wish they made a metal version, or could get select "parts". 81184



- 37185
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instructions as well as posted video made installation very easy and the parts themselves are well constructed 647812



- 37185
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Product was shipped and arrived sooner than expected. Mounting plate is a little thin and flexes quite a bit but shouldn't impact longevity as long as your careful when inserting plug. Unit is made of high impact plastic and wires are sealed. Don't see any reason why it shouldn't last a few years. 4 way plug didn't fit into my stock 4 way on my truck. I had to remove excess rubber in order to make it fit tight. Not a big issue but one should expect some standardization among 4 way plugs. Ground wire (white) is separate from the 4 way plug. Not sure as to why it was built that way but still functioned well. Regardless of my concerns, item was installed and up and running in about 20 minutes. I would buy again. 133653



- 37185
by:

After taking my new SUV to the dealer to have it wired to tow my camp trailer, I was told it couldn't be done. They refused to see that the vehicle had the tow package and to help me get the last few critical pieces to tow. I guess they were too busy! So I tried a reputable RV shop that I have worked with before and they quoted me over $400 to custom wire my SUV. I knew there had to be a better option. Looked online and found etrailer. They made it sound easy. I purchased: Tekonsha PowerTrac Electronic Brake Controller (39523), Tekonsha wiring adapter (3035P) and 4 pole to 4 & 7 pole adapter (37185). It all arrived quickly and after following the instructions online and even with average mechanical skills, I was good to go in about one hour. Saved about $300 and whipped it out that fast. Why consider any other option. I am extremely satisfied. 59917



- 37185
by:

This was exactly what I was looking for to add to my 2017 Ford Expedition! It is an easy to install plug-n-play product to convert a factory 4-pin connector to a 4/7-pin connector. I plugged the 4-pin in, connected the brake wire, and grounded it. Ignoring the auxiliary + power cables, everything worked on the first test. The 4-pin connection was given some dielectric and wrapped with electrical tape to keep it sealed from the elements, and the slack was zip tied to secure it. I still need to give it some finishing touches (fill the bracket gap with some black silicone, maybe find the reverse and/or power lines), but it lets me haul my camper! 635819



- 37185
by:

Great product fast shipping.. used on 2004 Lincoln navigator. 479026



- 37185
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Wow after Charles great advice this was so simple to install, YouTube video was point on and the hardest thing was finding the reverse wire. Thanks so much for a good product and excellent advice, here is the pic after install! 500490



- 37185
by:

Just what I need to tow an RV trailer. Also has a four flat connector. Very easy to install on the 18136 bracket. 63719



- 37185
by:

If you have 4-flat and need RV, this is the connector for you. Easy to hook up (unless you need to wire in the brake controller). I needed to convert my Corolla 4-flat to 7-pin RV to match my VW Vanagon and motorcycle trailer with newly installed brakes. I haven't hooked up the brake controller yet on the Corolla but I needed the plug compatibility 'til I do. 217850



- 37185
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Works as advertised 567566



- 37185
by:

I installed the ETBC7 kit a year ago, and a recent trip wiped the plug off while crossing a stream. This was a perfect replacement for my damaged plug and easy to install. 94452


Comments

It is working fine. No problems.

Ron J - 08/13/2014

6242

- 37185
by:

This kit is fine for what it is. It is not designed for those who have no existing wiring in the vehicle. You will need ETBC7 if you want an all included kit that provides added wires and fuses for customers who don’t have trailer break or reverse light wiring already installed. If you don’t need the extra material, this is a great kit to turn a 4 pin into a basic 7 pin connector. Also, be aware, you need to look and see where you want to mount the connector. You may need an addition adaptor plate to mount the bracket to the trailer hitch if you don’t have a good location available. 541243



- 37185
by:

Provides a 4 pin and 7 pin connector in one compact package. Rear housing is considerably shorter than most, so it's less likely to interfere with the hitch cross member. Includes a mounting bracket, or works great with Curt C58000 bracket. Only complaint is that the 12V wire is quite short, so a crimp connection needs to made very near the connector. Be sure to seal that connection against corrsion. 458708



- 37185
by:

Nice quality adapter harness. I would highly recommend etrailer.com 134651



- 37185
by:

Installed on a 2010 Ridgeline. Just what I needed at a great price. Install was a breeze. etrailer is the best place to find all the stuff that auto dealers rip you for. Good quality and the customer service is above reproach. 501788



- 37185
by:

I haven't installed chains or boat trailer plug and 7 way cord yet.I would like to say that etrailer's quick shipping is second to none!!I buy a lot of things on line like ebay,but I am really impressed by your U.S map tracking system.Before I bought my items I emailed you to make sure of the fit,Your response was fast. 326755



- 37185
by:

2018 wrangler unlimited Sport S. Without trailer wiring. Completed installation today. Used a 4 flat along with a 7 pin converter. Works and fit perfectly. Very hot day and work slowly and carefully. Very satisfied . Great folks at etrailer. Great products, great quality and prices. I'm a several time repeat customer and couldn't be more satisfied. 4 pin harness Was a 56407 and the 7 pin adapter was a 37185. 539606



- 37185
by:

I installed this along with a brake controller on my 1997 Nissan Pathfinder earlier this year and it was easy to install and the instructions were nicely detailed. I do have some mechanical skills so I would say you need to have some knowledge of electronics, but if you do some careful planning and study, most people could handle the installation. I toasted my plug on some rocks on my last outing so I purchased this to replace my original one. It's a great product. As always, etrailer is very helpful and their knowledgeable staff make it a pleasure to do business with. 259017



- 37185
by:

This item was received without instructions. The 4pin is easy enough to plug into any other 4 pin. Once you ground the white lead the brakes and signals work well. I dont know what the blue or purple wires are for, as instructions did not come with this item- wiring diagram either. Black lead I assume is power, to be connected to a hot lead, for internal trailer lights, idk. Otherwise, I am happy. 527702


Comments

The black wire is the power wire it needs to be connected to the positive side of the battery by using a 40 amp circuit breaker. If you are using your reverse trailer lights attach the purple wire coming out of the 7-way connector to the your reverse light wire. The blue wire is for electric brakes its going to go to the output wire on your brake controller. There should be a black wire coming from your brake controller that will connect to the positive side of the battery as well using a 20 or 30 amp circuit breaker. The red wire from the brake controller will connect to the cold side of the brake switch above the brake pedal. The white wire on the brake controller grounds to the negative side of the battery. I have attached help articles to assist you.

-- Heather A - 07/10/2018

40767

- 37185
by:

The product itself is very well made. The 4-pin connector is molded into the product and very sturdy. The 7-pin connector is held closed by a spring and has a foam gasket to keep water out. The 4-pin wiring is only about a foot long, and the additional 7-pin wiring is a bit longer. I do not have a brake controller (but do borrow a trailer with the 7-pin wiring), so I removed those wires. I also hard-wired all the connections, so I can't speak to the quality of the 4-pin vehicle connector. The mounting bracket is thin steel, which worked well for me, as I had to bend the mounting plate to make it work for my installation. The paint on the mounting plate appears to be high quality as I bent the plate and banged it around quite a bit during install and did not nick the paint. The plate is drilled so that is can be mounted with the 7-pin hinge facing up, down, left or right. The hardware is zinc coated, so it should hold up well to the weather. I went ahead and replaced it with SS to make sure. I also replaced the standard nuts with SS nylon lock nuts to make sure nothing would back out due to vibration. If you plan on using the supplied hardware, I would strongly suggest Loctite on the mounting nuts. I installed this on a CX-5 with hitch # 87623, wiring adapter # C56011 and hitch cover # I-728. Over all a very clean installation. The connector is completely hidden inside the bumper, but easily accessible. 72768



- 37185
by:

Hitch arrived in a timely fashion. Installation was a breeze and the fit and finish were perfect. Wiring harness hooked up perfectly. etrailer made the whole process simple. I just ordered another hitch and harness for our new car. 379041



- 37185
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prompt delivery, just what I ordered. 729601



- 37185
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Works great! 727596



- 37185
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the product arived ahead of schedule, it is no installed on new van and working perfectly,,,thank you so much 726162



- 37185
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RV trailer plug came in time promised. Looks to be good quality and should last a long time. Price was very good compared to cheaper quality pugs I have gotten in the past. 723401



- 37185
by:

Received Hopkins 47185-B 4 pole to 7 pole and 4 pole plug along with Roadmaster 146-7 7 to 6 Wire Flexo-Coil to connect my tow vehicle to my motorhome. Quality is excellent on both items. Everything needed to complete this task is included. Talked with staff to make sure I was purchasing the right items; and they made sure I was getting what I needed to complete the job. Great products and great knowledgeable staff who understand their products! Would highly recommend etrailer!!! thanks 723370



- 37185
by:

Very nice and convenient product as always with Hopkins products. 720964



- 37185
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Super easy install with the new hitch. Had same model on previous truck and was a great product- durable, easy to use 719114



- 37185
by:

Very great, wires ready to go was great. 719101



- 37185
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This four pole to seven pole was very easy to install. My Ford Expedition has a towing package so there was already a blue (brake) wire in the back, making the installation super easy. Great product. Works perfect. 719012



- 37185
by:

Excellent product with fast shipping. 718757



- 37185
by:

The trailer wiring adapter was perfect and shipped in no time. Looks great on my ford ranger. Im very happy. Was 4 flat only and now I can light my 7 way 18' trailer and have the capacity to add a brake controller (which I will add) 718667



- 37185
by:

Easy to convert 4 pin to 7. Didn’t need 2 of the connections, so tied them off. With a hammer and vise the Bracket brands fairly easy no match bumper contours. 716887



- 37185
by:

Easy installation 713679



- 37185
by:

Great product! Fast shipping! Hitch fit perfectly, all hardware and instructions were included and only took around 30 min. to install. I did have to fabricate an extension bracket (out of stainless sheetmetal) for the wiring connector so it would clear the hitch bar, but I anticipated that as I ordered the hitch that allowed me to retain the factory spare under the van. Great product, great value, great service and I'll definitely be shopping on etrailer again! [Thumbs up] 708142



- 37185
by:

Excellent quality and a great price. Even better is that it comes with ALL of the hardware needed to install it. Will definitely buy again! 707776



- 37185
by:

Hopkins products are well made and easily installed. Will purchase more when needed. 704886



- 37185
by:

all went well 700615



- 37185
by:

Works perfect 696409



- 37185
by:

Received my adapter a day earlier than expected. It's much heavier duty than I anticipated. Look forward to the installation after reviewing the straightforward video a couple more times. 691436



- 37185
by:

Bracket didn’t match the curve of my factory bumper but with some minor mods was able to get one bolt in it which is adequate. 683170



- 37185
by:

Quality of product and assembly instructions were what i was hoping for. I would recomend these products to anyone doing home projects. Completely satisfied! 681493



- 37185
by:

Product came in excellent shape. Instructions were spot on and easy to follow. Our van is still pulling our 2,000lb camper with airbags doing exactly what they are supposed to do. Slight hiccup with lost shipment on the first order but one phone call to e-trailer and another shipment was on the way. Excellent company to deal with and highly recommend. 678728



- 37185
by:

This is my 4th order from etrailer.com. They are one of the finest online shops. Fast shipping, quality products. Support is fantastic - help to id the right parts so they work together, a call offering compatible substitute for an out of stock item. Prices are tied with the best other suppliers, but their support and service make them my number one choice for anything trailer related. This order is VERY good quality and lets me tow both 4pin flat or 7pin RV connector trailer wiring. I tow with a Prius V with extra battery and inverter in trailer which needed 7pin to char gf e from the car. A real challenge for them and me to find parts and etrailer.com has done it. 666894



- 37185
by:

The Product works awesome on our KIA Sorento 2009, but there is a very big problem with the 7 way connector. Over the winter the plastick cover of the 7 Way connector broke by the hinges. I asked now for the second time is there is a 7 Way connector available with a metal cover instead of a sheep plastic one, the answer is "No". I have to say if etrailer will be the good compagny be that they will be, this is point of interest. Since I bought this piece of equipment I replaced it now 2 times, each time after the winter. So Etrailer make me happy and make me a metal 7 Way connector. Read etrailer for Hopkins ofcourse. Also the breaked which comes to the packet is very thin metal and rust quickly. I made one by myself, but this should not be necessary. 665398



- 37185
by:

Great product and easy to install. 663880


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Ask the Experts about this Hopkins Wiring

Do you have a question about this Wiring?


  • Adding a 7-Way Trailer Connector to a 2016 Chevrolet Express 3500 Van
  • We don't have a 7-way to plug directly into the van but I do have an option for you. If your 2016 Chevrolet Express 3500 van had a factory 7-way and it needs to be replaced you can wire in a new one with a harness like # PK11998 and then connect it to a 7-way connector like # A10-7072VP or # HM40975. If there is currently no trailer connector at all you will first need to install a 4-way connector, # 31345. Once you have the 4-way you can use our # ETBC7 kit for a fully functioning...
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  • Is Reverse Light Circuit Needed When Using the Curt Echo Bluetooth Brake Controller
  • If you purchased a 4-Way/7-Way Hopkins adapter like part # 37185 so that you can use the Curt Echo Mobile Trailer Brake Controller # C51180 then you are correct about only needing to connect the 12V power wire for the brake controller (in addition to connecting the typical trailer light circuits and ground). The reverse light wiring is optional and is really only needed if your trailer has a separate circuit for the reverse lights. We actually created the kit # ETBC7L for people who...
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  • Can ETBC7 be Used to Install Curt Echo Brake Controller
  • You could use the # ETBC7 to just install the Curt Echo Mobile part # C51180 if you wanted to but you'd have more parts than you'd need so it might be easier just to use the # 37185 as the adapter and then run 10 gauge wire like part # 10-1-1 (sold by foot) through a breaker like part # 9510 to the positive post of your battery. The # ETBC7 comes with those three parts but it also comes with extra relays and parts you wouldn't need. Another option would be just the part # ETBC7L and...
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  • Using the AutowBrake Brake Controller with a 1999 Toyota 4Runner and a 1997 Toyota Previa
  • Installing the Autowbrake brake controller, part # 3430001, doesn't actually requrie you to make any changes to the 4-way connectors on your vehicles. All it needs to function is to be wired to the proper wires on the trailer and a constant power source. If you want, you can wire the Autowbrake's power wire (the black wire) to the trailer's running lights and then it will have power as long as you tow with your lights always on. The downside to this is you will then always be drawing...
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  • In order to install a 7-way trailer connector on the rear of your 2017 Mercedes-Benz Sprinter 2500 you will need to use the T-One Vehicle Wiring Harness part # 118649 with the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185. Unfortunately, they do not make a wiring harness that splices into the taillights and give you a 7-way trailer connector therefore this will be your only option. If you will be towing a trailer with brakes then you will still need to use part # 118649 but instead...
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  • Parts Needed to Install 7-Way on 2011 Nissan Pathfinder
  • If your trailer does not have brakes your best and easiest route would be to use the adapter part # 37185. Your 4-way plugs into it's 4-way and you have both a 4-way and 7-way with just taillight functions. If you need trailer brakes you'll need quite a few more things. To star you'd need the part # 118281 for a 7-way. But you'd need to swap out the socket to the part # HM40975 as it will install and give you both the 4 and 7-way. For a brake controller I would recommend the Prodigy...
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  • 7-Way Trailer Connector for 2019 Toyota Tacoma
  • If you want a fully functioning 7-way on your 2019 Toyota Tacoma you can use part # 22117. This includes everything you need including the wiring to install a brake controller which you don't need since your trailer doesn't have brakes. If you would prefer to just have a 7-way that powers the trailer's lights and nothing more then instead I recommend installing a 4-way connector, part # 118685, and then converting it to a 7-way using an adapter, part # 37185. The adapter has the additional...
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  • Recommended Trailer Hitch and Wiring for 2019 Kia Sorento to Utilize Wireless Brake Controller
  • For your 2019 Kia Sorento, I recommend you start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118583 and then add the 7-way adapter # 37185. You will then attach the white wire with the ring terminal to a bare metal ground on your vehicle frame and then use wiring # 10-1-1 to run the 12V wire (black on the adapter) to circuit breaker # 9510 and then to the positive terminal on your vehicle battery. You will not need to connect the blue or purple wire on the...
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  • Least Obvious Trailer Hitch Receiver and 7-Way Trailer Connector on 2016 and 2017 Mazda CX-9
  • The 2016 and 2017 Mazda CX-9 models both use the same trailer hitch receivers and wiring harnesses. Both the Draw-Tite # 76020 and the Curt # C13284 Class III trailer hitch receivers are pretty hidden. But the Draw-Tite seems a little less obvious because there's a little less of the hitch hanging below the bumper. I've linked install videos of both of them for you. There isn't a 7-way trailer connector that plugs into the CX-9's wiring. However, we do have the parts for you to...
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  • Trailer Wiring Recommendation for 2018 Jeep Wrangler JL Unlimited
  • For your 2018 Jeep Wrangler JL Unlimited the T-One trailer wiring kit part # 118786 is a confirmed fit and would be what we recommend. This is our most reliable brand of trailer wiring so it's the way to go. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire...
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  • Difference Between 4-Pole to 7-way Wiring Adapters 47180 and 37185
  • Hopkins part # HM47180 is a 4-pole-to-7-way wiring adapter that is equivalent to the similar # 37185. The only real functional difference between them is that on part # 37185 the 4-pole trailer connector is located to the side of the 7-way, rather than under it as with # HM47180. Both adapters plug in at an existing 4-pole vehicle connector and re-format those lighting signals to the 7-way configuration. The 7-way can be wired, if desired, to add new functions by using the included pigtail...
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  • Replacing Factory 4-Way on 2006 Ford F-150 with 4-Way/7-Way Connector
  • Yes! The Hopkins Plug-N-Tow # 40185 is a plug and play solution for replacing the factory 4-Way on your 2006 Ford F-150. To add a 7-Way/4-Way connector you would then need the Hopkins # 37185. This connects directly to the 4-Way and then has additional wires that you can connect to wiring run to the rear of your pickup for it to be fully functional. You can mount the Hopkins connector with part # C57202 to avoid drilling into your trailer hitch. If you want to permanently install...
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  • Parts Needed to Install a 7-Way on a 2017 Ford Transit T250
  • Your 2017 Ford Transit T250 will have a round connector at the rear of it that the part # HM40975 would connect directly to since your vehicle has the tow package. If it didn't have the tow package you'd need to start with a 4-way like part # 118643. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller....
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  • Parts Needed to Install Brake Controller in 2017 Ford F-150 with 4-Way
  • To install a brake controller on your 2017 Ford F-150 w/ factory tow package and 4-way connector, you will need to install Adapter 4 Pole to 7 Pole, part # 37185. You will need to run 2 wires, to the front of the truck, the Black wire for 12 volt power, and the Blue wire, which supplies power to the brakes. The Blue and Black wire will connect to the Ford wires that terminate along the frame of the F-150 near the spare tire (see FAQ). Then, you will need to use the vehicle specific adapter...
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  • Brake Controller Installation in 2019 Ford Ranger
  • We have not yet (as of April 2019) had a chance to install any wired trailer brake controllers on a 2019 Ford Ranger so for guidance I checked with my most trusted brake controller expert at Tekonsha. Based on what I could learn about the truck if the Ranger has a factory-installed 7-way it should have a standard brake controller connection port above and to the left of your left knee when seated; this will be near the kick panel. You will want to look for a connector that matches the...
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  • Installing a Brake Controller on a 2018 Jeep JL Wrangler Unlimited with Factory Tow Package
  • While I cannot confirm a brake controller wiring harness for the 2018 Jeep JL Wrangler Unlimited there is still a way to install a brake controller. First you would need a 4-Way wiring harness. We do have trailer wiring harnesses for the 2018 Jeep JL Wrangler Unlimited. For models without the factory tow package Curt has # C56407 and Tekonsha has # 118786. There is a note on the Tekonsha harness though that states it does not currently work with Rubicon or Sahara models. Adding a...
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  • Adding a 7-Way and Keeping a 4-Way Trailer Connector on a 2015 Chrysler Town and Country
  • To add a 7-Way trailer connector and retain the 4-Way you already have on your 2015 Chrysler Town and Country I recommend using # 37185 if you just want the lights to function on your Rpod. If the trailer requires 12 volt power for accessories and/or has electric brakes then I recommend using # ETBC7 instead and brake controller # 90885. I have included some links that show and explain the ETBC7 installation for you.
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  • Recommendation for Adding 7-Way Trailer Connector to Hyundai Santa Fe Sport with 4-Way Connection
  • For your adapter from the 4-way to a 7-way, I recommend the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole # 37185. This will give you the option of adding the 12V power, the brake controller output, and the reverse lights. Even if you don't add those functions, you still need to install the white ground wire for proper function. If you want to add those features, I recommend the wiring kit # 5506. The trailer side 7-way will work well with this adapter on your Hyundai Santa Fe Sport....
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  • How to Convert a 4-Way to a 7-Way on a 2017 Ford F-150
  • If you are just needing a 7-Way to activate the lights on your trailer then you will simply need to use the Hopkins # 37185 that you referenced along with a No-Drill Mount Bracket # 18140 as depicted at the start of the attached installation video on a 2011 Ford F-150. For a fully functioning 7-Way that has power to the Brake Controller and 12V Power you will simply need some Deka Jacketed 2 Wire # 10-2-1 and Butt Connectors # DW05745-5. You will want to splice the Blue wire from the...
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  • Installing a 7-Way Traielr Harness on a 2018 Dodge Grand Caravan
  • I found your order and see that you arleady purchased: Draw-Tite trailer hitch receiver # 75579 Trailer Wiring Harness # 118534 Adapter # 37185 Brackets # 18138 and # 18140 All of which will work on your 2018 Grand Caravan and sounds like exactly what you need. The only exception is maybe substituting the long bracket # 18136 for the short # 18140 because there isn't always enough space using the short one with a 7-way. The adapter, # 37185, includes both a 4-way and 7-way...
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  • Parts Needed to Install 7-Way on 2017 Jeep Wrangler
  • The tow package for your 2017 Jeep Wrangler would have included a 7-way at the rear of it and not a 4-way which is why the # HM40975-11933 is not able to plug into your vehicle wiring. So while we have a solution for you it won't be with the part # HM40975-11933. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller....
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  • Recommended Hitch and Wiring for 2016 BMW X5 with M-Sport Package
  • I spoke with a representative of Curt who confirmed hitch # 13077 would fit your 2016 BMW X5 with the M-Sport package. I've added a link to a video of this hitch being installed on a '16 X5 for you to take a look at. The recommended ball mount for your vehicle is # C45030; for a hitch ball you would need # 63845 for a 2" ball or # 63847 for a 2-5/16" ball. You would also need pin and clip # C21500. For a brake controller with your 2016 BMW X5, you would need to use the Prodigy RF # 90250....
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  • Adding a 7-Way and Brake Controller to a 2007 Volvo XC90 with 4-Way Connector
  • I will be happy to help. There are a couple of ways you can add a 7-Way trailer connector to your 2007 Volvo XC90. If you just want the lights to function on the trailer then you can use # 37185. Your 4-Way will plug into this adapter and then you just have to mount it and ground the white wire to a bare metal surface. The other wires can be taped up and stowed out of the way. If you want to have a fully functional 7-Way and a brake controller then instead of 37185 you will need # ETBC7....
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  • Adding a 7-Way Trailer Connector to a 212 Subaru Outback and How to Charge Trailer Battery
  • I do have a video that will be very helpful when installing a 7-Way connector on your 2012 Subaru Outback. I have linked that video for you. But not all parts of the video will apply to your situation simply because of the type of brake controller you are using. So you can just ignore those parts. You will need # ETBC7 which comes with the 7-Way and the wiring and other accessories you will need. The installation is not difficult and if you have even a little experience with automotive...
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  • Finding Reverse Light Circuit When Installing 4-Way to 5-Way Adapter on Vehicle
  • When connecting to the reverse light circuit of a vehicle for a 5-way adapter like the part # 20036 you want to use a circuit tester like part # PTW2993 to test the wires that run to the reverse light circuit till you find the one that has voltage when the reverse light is on. That's the power circuit to use for the 5th pin of the adapter. I don't have a way to look up what color the wire would be on your truck but using the tester will lead you to the correct circuit.
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  • Parts Needed to Install 7-Way Trailer Wiring on 2017 Ford Edge
  • You will need to start with a 4-way (if you do not have one). For that you would want the # 118669. I attached an install video that shows this installed in a very similar 2016 Ford Edge as yours. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way...
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  • Parts Needed to Install 7-Way Trailer Wiring Harness in 2017 Honda CR-V
  • For your 2017 Honda CR-V there are only 4-way harnesses we offer as custom fit options. For that you would want the Tekonsha harness part # 118741 which is a custom fit option. I like to recommend the Tekonsha brand as it tends to be the most reliable. I attached an install video for you to check out as well. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the...
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