Lowest Prices for the best Wiring from Hopkins. Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter part number 47515 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter

Hopkins Wiring

(78 reviews)

Code:   47515


Shipping Special

Shipping Weight: 0.17 pounds


Hopkins Wiring - 47515

Trailer wiring adapter that changes the 4-pole flat on your vehicle into a 5-pole flat.

The blue wire gets spliced into the reverse light wire on the vehicle which is easily done with the included quick splice wire connector.

Hopkins # 47515, TAP # 37515

47515 Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter

Video of Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter

Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.

Video Transcript for Hopkins Wiring 47515 Review

Today, we'll be reviewing part number 47515. This is the Hopkins Adapter 4-Pole to 5-Pole Trailer Wiring Adapter. The trailer wiring adapter is going to change the 4-pole flat on your vehicle into a 5-pole flat. You can see here that you have the 4-pole connections you plug into the 4-way flat on your vehicle. On this side, it's going to convert it over to a 5-way connection. Now, the blue wire is the wire that's going to get spliced into the reverse light wire on the vehicle, which is easily done with the included quick splice wire connectors. That is included with this part number.

This is going to be great for use with marine trailers equipped with surge breaks to eliminate rewiring your vehicle or trailer. When installing this, you want to make sure to use a tester to locate the backup wire at the rear of your tow vehicle. You're then going to splice the blue wire onto the backup wire of the tow vehicle using the supplied splice connector. Once you have that done and secure, then you can simply just plug in the vehicle end and the trailer end and then you would be all set to go. The blue wire, you can see here that it has a little inaudible 00:01:06 connector on it that connects the two pieces together. When fully connected, that's going to give us a total length of around 56 inches. That's going to do it for today's review of part number 47515. This is the Hopkins Adapter 4-Pole to 5-Pole Trailer Wiring Adapter.


Customer Reviews

Adapter 4-Pole to 5-Pole Trailer Wiring Adapter - Shorter - 47515

Average Customer Rating:  4.8 out of 5 stars   (78 Customer Reviews)

- 47515

by: BSM09/26/2014

This product is very well made. Instructions are a bit brief, but plenty of info online to get it installed. The reverse wire on my car was too small to work with the splice, but I connected them directly w/ a "T". Worked flawlessly with my trailer. The length of the wire on the adapter allows you to make the connection INSIDE the car which will surely extend the life of the connection. Overall great and simple design. 153312


Still works but seems sporadic at times. Will investigate my hydraulic servo for the brakes to ensure they are locking out as required to reverse.

BSM - 09/27/2015


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by: Robert R07/10/2014

Great product and quick delivery. Video was very helpful and made installation easy. 140684


Its still working perfectly!

Robert R - 07/10/2015


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by: Al S10/06/2014

Great product! I have a Jeep Wrangler Unlimited that only has a four pole flat connector. I have a boat thats needs a five pole because it has surge brakes. This was the perfect solution. I just had the fifth wire connected to the back up light and plugged this five to four pole adapter that was already on the vehicle. Problem solved. It came quickly. I accidently ordered two and I got a call from Etrailer questioning my order. I thanked them and said I only needed one. They saved me the cost of the second adapter when most companys would have just sent them both- and charged me for two. 154766

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by: Jim T07/03/2013

Watch the video! This product connects so easy I was up and running in 20 minutes. 87430


still in use

Jim T - 07/09/2014


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by: David01/21/2014

Perfect 114426


Still working perfect no prob.....

David - 01/21/2015


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by: Dean A.05/11/2015

I put this on my 2016 Kia Sorento. Do yourself a favor and watch this instructional video "Hopkins Trailer Wiring Adapter Installation - 2014 GMC Acadia". Another great tip for my application is to buy an extra 20 feet of 16 guage wire. I ran the wire from the tailgate on the inside of the weather stripping and snaked the wire into the utility tray in under the back flip up compartment. When I need to hook up the adapter - I just run it out of the tailgate and hook it up. This keeps the adapter out of the elements when not in use. 191722

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by: cliff07/31/2014

exact !!!! 143896



cliff - 07/31/2015


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by: Mark L06/20/2012

Put this on an '05 Ford F150. Simple install and took only 5 minutes. Drivers side reverse tail light has two screws on the tailgte side. The hot wire for backup light was brown w/ a red stripe. Unfotunately, my package didn't have the wire splice connector inside as it was suppose to so I used stuff I had at home. Works like a charm. Very clean looking with no extra wires dangling. Should get 5 stars but the lack of connector bummed me out and I didn't have time to return it. Cheers 44918

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by: Jason B.09/29/2014

This product was everything that is says that it is. Suggestion for hatchback owners, though. See if your reverse lights are in the hatchback or on the fender panels before purchasing this product. If they are in the hatchback, as in the 2014 Escape, then you will need to purchase a longer adapter or additional wiring as the routing of the wires to the closest reverse wire is substantial. 153594

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by: Arthur L.07/22/2014

Excellent product. Connected it in about 10 minutes. Had to remove the taillight and splice to back-up light (splicer included). Easy install (pug and play) and works great. Thanks for having this online at your store. Could not find one locally in Houston area (can you imagine). Excellent pricing and free shipping! Doesn't get any better. 142512

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by: Ben R.06/11/2015

Terrific online company! Their website is easy to use and contained tons of information, including multi-angle pics and videos, so I was sure I was getting the exact part I needed. It shipped very quickly and I had the wiring installed and complete in just a few days after I placed my order. I highly recommend etrailer.com! Thank you!!! 202471

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by: Tom F06/07/2011

I Have been looking for this product for a long time. I did not know the part number or even that it existed, I just had a need. At etrailer.com I not only forund this product. I found a couple versions of the same solution. Plus etrailer showed me a video on how to install it. Great site 16301

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by: Chris03/11/2009

Great Product! It was a very easy install. The blue wire is only long enough to go to a reverse light that is on the rear corner. I had to buy additional wire from the auto parts store to continue the connection up the side of my vehicle and through the back hatch. But it works great. 1639

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by: Mike E.03/02/2014

This is an excellent adapter; however, I didn't give it the highest rating possible because the wire is not as long as I needed. While it was easy for me to add a section of wire, I don't understand why it's not about a foot longer so that it would work easier on any vehicle. 118185

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by: Dave S10/19/2014

Product is exactly what I want, but should include a dust cover. Also, wire that leads from plug is too long, and the tail light wire is too short. Where they connect should be closer to the plug, because the way it is you can't really unplug it from underneath the vehicle. 156751

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by: Todd01/22/2014

Part arrived in time and everything's cool. The #1 thing I like about etrailer.com is that I can simply email them my questions and they reply back with all my options. Will be doing that again in a month for the next trailer item I'll be needing soon. Thanks. Todd 114450

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by: Tom O06/19/2015

Very useful and easy to install along side the 4-flat that I installed at the same time. The toughest part was locating the reverse light wire. This was of better than expected quality and the wire was just the right length for my 2006 Jeep Commander. 204511

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by: Albert Anable04/03/2011

The adapter works great. The installation on a 2005 Subaru Outback is a bit more difficult because the backup lights are located on the liftgate. Still only took about 1/2 hour. Now I just need to find a cover for the 5-Pole! Al 11001

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by: Steve02/18/2013

Ordering was easy; shipment was quick; the part arrived as expected and worked great. It was very easy to install. Took all of 10 minutes at most! Thanks! 66804


Thanks! It has worked great. I have been very pleased with the product.

comment by: Steve - 02/18/2014


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by: Duane B12/05/2014

The 4 to 5 pole adapter was exactly what I needed to pull my new boat with hydraulic brakes. I installed it myself in less than 10 minutes saving me the time and cost of going to an RV or trailer store. 163414

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by: Keith V.04/29/2014

I purchase the 4 to 5 pin trailer plug adapter for my boat trailer. The product was just as described and installation was super easy. Fast shipping and packaged well. Keith 128114

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by: Bill C10/01/2015

Recently bought new trailer having 5 pin connector. Purchased 4 pin to 5 pin adapter that worked out great. Product was easy to install and an inexpensive fix to my issue. 228721

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by: Bob08/26/2015

The 4 pole to 5 pole adapter arrived in a timely manner and was extremely easy to install. I thought I was going to have to re-wire everything before I found this product. 221785

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by: H. David F.03/18/2015

I got this adapter for pulling my boat, the extra wire hooks to reverse wire that releases surge brakes when backing your boat up. Great product, and simple installation. 179395

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by: John G11/03/2014

I got the adapter fast and it was exactly what i wanted. I installed it quickly and it works perfectly. I will use Etrailer anytime i need trailer parts. Thanks John G 158943

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by: Bob Wrobel10/02/2014

Product is perfect. It works as advertised. I am able to hook up my motorcycle cargo trailer and motorcycle camper, if I need to pull them behind my 2013 Ford Edge. 154146

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by: Kevin06/07/2011

I received this part in a timely manner and it matches my needs perfectly. I've purchased several parts from etrailer.com and will definitely be a returning customer. 16274

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by: Monty S02/28/2013

Received the adapter very quickly. The on-line tutorial was great and was able to install the adapter on my Ford 150 in less than 5 minutes. Works like a champ. 68147

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by: Tim P.04/27/2013

Exactly what I ordered and timely shipped. I love the tutorial videos really made trailer wiring easy to understand......I will definetly use etrailer again. 78144

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by: DAVE H07/21/2015

Easy quick fix for 4 to 5 pole on car wiring. Had to come thru hatch back on 2014 Highlander could have used a little longer wire but had some available 213391

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by: Lyle S05/14/2015

Very simple connection to a late model CUV. It works great and solved my surge brake issue with minimal expense and no aggravation. I highly recommend. 192993

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by: John Kirschenheiter03/17/2015

George J The 4pin flat connector to a 5 pin flat connector worked perfect. The quality was excellent. Thank you for a great product and great service. 179145

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by: John S.11/03/2014

Product was exactly what was advertised and just what I needed to to adapt to a five pin harness on my sons boat trailer. Great, FAST delivery. 159022

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by: Mr Larson05/05/2014

The adapter fits perfectly. Thanks for the follow up. We need to test to make sure it works, but if it is a standard setup, it should work 128889

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by: Patrick01/20/2013

Works fine. I'm not concerned with the reverse light so I didn't even hook up the blue wire, working great as a plug and play adapter. 63582

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by: Lisa E07/02/2015

I have ordered from ETrailer several times. I ALWAYS receive my order very fast and it is ALWAYS accurate! I highly recommend them!' 208896

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by: Wayne B05/07/2013

The trailer hitch bolted in place easily. Instructions were ideal. Firing kit and additional five flat adapter Were easy as well. 79238

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by: Andrew07/01/2014

I am extremely happy with this product. Easy to install and etrailer was the only location that I could find this item at 138480

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by: Dan E.04/18/2012

Needed a reverse light. Simple installation. Works great. Wish it came with a rubber cover to keep the muck out... 37638

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by: Greg L04/04/2012

Awesome service. The order, delivery, and confirmation process is outstanding...and priced very well. 36140

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by: John L.07/27/2014

Well made and simple to install with good instructions and all the parts necessary to do the install. 143093

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by: Bill H09/15/2015

Works perfect no problems with hooking up the wire to to the back up light...perfect adapter . 225686

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by: Sensei07/28/2014

Works as advertised. Wiring is too short - had to extend 18" to reach closest reverse wiring. 143165

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by: Jim R05/21/2014

Product arrived in a short time. Easy to install. Worked great. Great customer service. 131610

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by: PapaG08/15/2014

Great tech support. Product arrived ahead of schedule. Worked as expected. You guys rock! 146836

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by: Tony S.06/12/2013

This was very easy to add to the existing trailer wiring. Very good quality product. 84276

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by: Tim B.09/02/2014

Exactly what I needed and the installation video was extremely helpful. 149658

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by: Rob Bantly04/12/2014

Very easy instalation. Good Quality. The vidio also made it very easy. 124785

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by: Matt B05/25/2015

Part not installed yet. Service and delivery were outstanding THANKS 196708

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by: Jeffrey02/22/2013

Great price, quick service and delivery. Exceeded my expectations. 67360

Show More Reviews

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

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  • Normally, the 5 wire flat connector will accept a 4 wire flat connector and work properly. The extra circuit on the 5 wire connector is normally wired to power a reverse lockout or electric trailer brakes not the brake lights. If your motorcycle has the brake light circuit connected to the extra circuit you will need to do some re wiring or install a converter, item # 119178KIT, on the motorcycle. Your trailer should be wired as follows. White wire = ground, brown = tail light, yellow...
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  • Parts Needed to Backup Without Putting on the Surge Brakes When Parking or Launching a Boat Trailer
  • Yes, there is a way to back up your boat trailer and keep the surge brake actuator, # T4332900, from applying pressure to the trailer brakes. You will need an electric lockout solenoid, # T4748800, which will close when you shift the vehicle into reverse, allowing the trailer to be backed. Along with the solenoid, you will need a solenoid cover, # T4835800183, if your actuator is the model 60 actuator that you referenced. The cover will keep the solenoid from getting stepped on and damaged...
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  • The wire gauge of the blue wire on the Hopkins Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, part # 47515, will be too small to be able to use as a 12 volt power source. You will need to use a 10 gauge wire on your truck to run a 12 volt power wire to your trailer connector, along with a 40-amp circuit breaker. I would recommend to install the Hopkins Adapter 4 Pole to 7 Pole and 4 Pole, part # 37185, on your truck. This Hopkins adapter will plug into your 4-flat connector on your...
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  • Replacing 4-pin Plug with a 5-Way Plug So I Can Back My Trailer
  • If you have a working 4 pin trailer connector and a boat trailer with surge brakes then you will not need a 4 pin wiring harness. If your trailers 5-pin connector is the flat style you can use the 4 Pole to 5 Pole Trailer Wiring Adapter, part number 47515, and splice it into the reverse light circuit behind one of the taillights with the quick splice that is included with the adapter. If you need an extension for your trailer connection to mount the five pole connector to a bracket, part...
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  • Trailer Hitch, Drawbar, Hitch Ball, and Trailer Wiring Recommendations for a 2008 Jeep Commander
  • I can certainly point out everything you will need to tow the boat with your 2008 Jeep Commander. First, you will need a hitch. There are several available but I recommend going with a Class III hitch rated for weight distribution because you never know what you might be towing in the future. I would go with Hidden Hitch Trailer Hitch, # 87752. This is a Class III, 2 inch trailer hitch, capable of 500 pounds tongue weight capacity and 5,000 pounds gross trailer weight. When used with...
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  • For the Titan Leverlock Brake Actuator, # T4715420, to fit your 2008 Shorelander Trailer it needs to have disc brakes and a 3 inch wide channel tongue. The trailer needs to be 6,000 lbs. weight capacity and 600 lbs. tongue weight or less. This actuator has a solenoid for the electric lockout which needs to be wired to the reverse light circuit on the truck through the trailer connector on the vehicle and trailer. If you have a factory 7-Way connector on your vehicle the center connection...
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  • Can a 4-Way Flat on a Truck Be Used with a Trailer 5-Way Flat without Connecting Extra Wires
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  • 4-Way to 5-Way adapters # 47515 and # 20036 are essentially the same. The difference is that # 20036 has longer wiring with it than # 47515. For that reason we normally recommend # 20036. The 4-Way to 5-Way portion is 18 inches long. The blue wire though is 60 inches long from end to end. Additional light gauge wire, such as # 16-1-1, sold in 1 foot increments could be spliced in if a longer connection is needed.
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  • The easiest place to locate a reverse light wire on any vehicle is directly behind the reverse light itself. If that is not easily accessible then there will be a wiring harness that leads to the tail lights that may also contain the reverse light wire. You will need a circuit tester like # 3808 if you do not have one. Test the wires in the harness leading to the tail lights to determine if any of them are the reverse light and tap in there. Another option is to find the reverse light...
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  • Can a 4-Way to 5-Way Trailer Connector Adapter be Safely Used on a 2013 Ford Edge
  • The 4-Way to 5-Way adapter, # 47515, will work well on a 2013 Ford Edge and will not short out the vehicle electrical system if installed correctly. Installation is straight forward. The 4-Way on the vehicle plugs into the adapter. The blue wire then will connect to a reverse light wire on the vehicle using the included quick splice connector. This adapter is not circuit protected so if there are shorts on the trailer they could back feed to the vehicle. Make sure the trailer wiring...
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  • 4 to 5-Way Adapter Recommendation for a 2014 Jeep Wrangler towing a Boat Trailer With Surge Brakes
  • What you need is the Adapter 4 Pole to 5 Pole Trailer Wiring Adapter # 47515. This will plug into your existing 4-way on your 2014 Jeep, and then the blue wire will get ran to the reverse light circuit of your vehicle taillights and then tap into that circuit with the included quick-splice connector. I attached a video that shows a typical installation for this product for you to check out to the right.
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  • How to Find the Reverse Light Wire on a 2004 Lexus RX330
  • First, located the tail light wiring behind one of the tail lights on the 2004 Lexus RX330. Then, use a circuit tester, like # 3808, to probe each of the wires until you find the one that carries a signal when the vehicle is placed in reverse. You will need to have someone sit in the vehicle cab and put it in reverse. It is a good idea to apply the emergency brake, regular brakes, and even chock the wheels to prevent the vehicle from moving while in reverse. Once you have found the...
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  • Wiring Options for a 2009 Chrysler Aspen Towing a Boat Trailer with a 5-Way Flat Trailer Connection
  • Yes, the Tow Ready Custom Fit Vehicle Wiring for the 2009 Aspen by Chrysler, item # 118390, is the correct wiring harness for your Aspen and you will need one other item to complete the wiring to lockout the brakes on your boat trailer surge coupler. You can go one of three ways for this wiring. The easiest way in my mind is to install the # 118390 T-One and then splice the 5-Flat Vehicle End 72 inch Wiring Harness, item # 20016, to the 4 like wires left by removing the 4-way vehicle...
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  • Installation Instructions for Custom Trailer Wiring for a 2009 and 2010 Volkswagen Routan
  • In order to use the reverse lights on your trailer, you will need to add a 4-Way to 5-Way adapter like # 47515. Using a circuit tester, like the Quickee # 3808, find the wire behind your taillight assembly that carries the reverse light signal. It will have a signal when the vehicle is in reverse. Make sure you have someone in the vehicle to help you and put the emergency brake on for added safety. After you have found the reverse light wire, you can connect it to the Adapter 4 Pole to...
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  • How to Wire in an Adapter 4 Pole to 5 Pole Adapter # 47515 For a Reverse Lockout
  • The wire you are going to be looking for to activate the reverse lockout feature for your surge brakes will be the wire that powers the reverse light bulbs. I would recommend you use a circuit tester # 3808 to determine which wire has power when the reverse lights are illuminated and no voltage when the lights are not activated and then use a quick splice Connector # 804C to tap into this circuit and run wire from the quick splice to the 5-way. I attached a review video for a Adapter...
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  • Can the 5th Wire of the Adapter 4 Pole to 5 Pole Trailer Wiring Adapter Be Cut Off if Not Needed
  • Usually, on a boat trailer with a 5-Way trailer connector, the 5th wire goes to an electric reverse lock out on a surge coupler. This is so when you put the vehicle in reverse to back up, it will not allow the trailer brakes to engage so the trailer can move. If you do not need the blue wire on the Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, # 47515, you can just tape it up and and stow it out of the way. I would not cut it off because you may need it in the future. If you do...
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  • How to Install Adapter 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 on a 2007 Toyota FJ Cruiser
  • What you will need to go from the 4-Way flat on your Toyota FJ Cruiser to the 5-Way flat on the boat trailer is a 4-Way to 5- Way adapter. You can either use # 20036, or # 47515 (shorter). The 5-Way end of the adapter would plug into the 5-Way on the boat trailer. The other end would plug into the 4-Way on the vehicle. The extra blue wire would need to be connected to the reverse light circuit behind one of the tail lights. This circuit is used by the trailer side to engage the electric...
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  • Can a USA 4-Way Trailer Connector be Used with an Australian Trailer Configuration
  • The Australian 7-pole is like the European 7-pole in that it has separate turn signals and brake lights (and a few other functions not used in the states). A US 4-Way and trailer will have the turn signals combined with the brake lights on each side of the trailer. So you would have a ground (earth), running lights, left turn and brake lights, right turn and brake lights. In order to separate out the turn signals from the brake lights you would need a converter, # 118158. You would wire...
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  • Using a # A75TB 7-way to 5-pole Adapter to Tow Boat Trailer With 2013 Ford F150 w/ OEM 7-way
  • Rather than using a 4-pole to 5-pole adapter such as # 47515 or # 20036, with the extra wire that needs to be tapped into the reverse light circuit, a 7-way to 5-pole adapter like the # A75TB would work much better. If the 7-way/4-pole connector on your truck is factory installed, the center pin of the 7-way should already be wired to the reverse lamp circuit of the vehicle. You can test this by having a helper place the transmission of the truck in reverse (while stepping on the brake,...
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  • Converting a 4-Pole Wiring Harness to 5-Pole on a 2004 VW Touareg for Towing a Boat Trailer
  • Since you have the # 118509, custom wiring installed on your Touareg, you have two options. You can use the 4 Pole to 5 Pole Trailer Wiring Adapter, item # 47515, or you can cut the 4-Pole connector off of the harness and splice in a 5-Way connector, item # 20016. In either case the blue wire will be routed to the vehicle reverse light circuit, behind one of the vehicle tail lights, and spliced in there. Then, when the vehicle is in reverse, the electric lockout on your surge coupler...
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Info for this part was:

Expert Research:
Michael L

Expert Research:
Robert G

Expert Research:
Patrick B

Expert Research:
Michael H

Expert Research:
Jameson C

Video Edited:
Joshua S

Video Edited:
Jacob T

Expert Research:
John H

Expert Research:
Jeffrey L

Test Fit:
Alan C

Photos by:
Sam P

Video by:
Chris R

Updated by:
Sarah W

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