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Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

Item # ETBC7
Our Price: $117.78
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If your vehicle already has a 4-way flat, this kit includes everything you need to install an electric trailer brake controller and 7-way connector. If there's not an existing 4-way flat on your vehicle, you can purchase one separately. 1-800-496-5010 to order etrailer accessories and parts part number ETBC7 or order online at Free expert support on all etrailer products. Guaranteed Lowest Price and Fastest Shipping for Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires. Accessories and Parts reviews from real customers.
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etrailer Accessories and Parts - ETBC7

  • Trailer Brake Controller
  • Installation Kit
  • etrailer

If your vehicle already has a 4-way flat, this kit includes everything you need to install an electric trailer brake controller and 7-way connector. If there's not an existing 4-way flat on your vehicle, you can purchase one separately.


  • Kit includes wiring and accessories required for installation of a trailer brake controller (sold separately) in your vehicle
    • Designed for use on a vehicle with an existing 4-way flat trailer connector
  • 25' Long, 10-gauge duplex wire is wrapped in an abrasion-resistant cover
    • Connect one wire to the blue wire on the brake controller
    • Connect one wire to the positive post on the vehicle's battery via the included 40-amp circuit breaker
  • Pre-wired 7- and 4-way trailer connector mounts easily at rear of vehicle with included bracket
    • Plugs into existing 4-way trailer connector on vehicle
  • Heavy-duty circuit breakers - (1) 20 amp, (1) 30 amp, and (1) 40 amp
  • Circuit tester helps you find the stoplight switch wire above the brake pedal
  • Also includes hardware for installation:
    • Ring terminals for battery and breaker hookup
    • Quick-splice wiring connectors
    • Self-tapping screws
    • Zip-ties
    • Wire loom for a professionally installed appearance


  • No existing 4-pole connector: If your vehicle does not already have a 4-pole flat trailer connector installed, the etrailer application guide can be used to find the easy-to-install connector made specifically for your vehicle.
  • Extra-long vehicles: If you drive a crew cab, extended cab with long bed, cargo van, minivan, or extended-length SUV, 10' of extra wire (10-2-1, sold separately) will make installation much easier.

7-Way and 4-Way Trailer Connector

57672 Connector Diagram

Wiring Diagram for Trailer Brake Controller Installation

Wiring diagram of brake controller installation

ETBC7 Universal Installation Kit for Electric Trailer Brake Control - 7-Way Blade and 4-Pole Flat - 10 Gauge Wires

Installation Details ETBC7 Installation instructions

Customer Satisfaction Score:

Customer Reviews

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires - ETBC7

Average Customer Rating:  4.8 out of 5 stars   (2599 Customer Reviews)

If your vehicle already has a 4-way flat, this kit includes everything you need to install an electric trailer brake controller and 7-way connector. If there's not an existing 4-way flat on your vehicle, you can purchase one separately.


Used this Kit on my 2017 JKU with aftermarket steel bumpers. Wired up to the Redarc Tow-Pro Elite Nreak Controller. Worked Great!


I've had this trailer hitch on my 2013 Outback for a year now and love it! I tow a popup tent trailer and this hitch works excellently. It was a solid half day installation but my Dad and I were able to knock it out no problem! I love the discreet look of this since I'm not often towing the trailer. I couldn't recommend enough! Way better than the bulkier, less tasteful versions available.


I installed the kit on my 2007 Toyota FJ Cruiser, which was already equipped with the factory 4 wire connector, and it was pretty straight forward. Of course, it's universal kit so there are lots of variables between vehicles, bur that being said, it fit mine just fine. The only thing I did differently is tapped the brake light circuit at the master cylinder with the included Scotch Lock rather than at the brake pedal since my vehicle has a manual transmission and the clutch pedal made it all but impossible to access the circuit there. Overall, the hardware seems to be of good quality and the instructions were fairly easy to follow. I must say the included 4-wire connector extension isn't very secure in the connector bracket, but a little RTV should fix that. I will be towing a lightweight A-frame trailer and I'm sure this is just what I need.


Our tow vehicle came with only 4 pin harness plug in and no brake controller. E-trailer staff was very helpful getting me on the right track to install a 7pin connector and brake controller. After thousands of miles, everything is working perfect.

Our vehicle had a tow package but was only wired for a 4 pin connector. Our trailer needed battery charging and brake power. Options are pay or do it my self. With this universal wire harness seven pin kit and the coaching from eTrailer I had all I needed. The hidden benefit when you do it yourself is that it is done right. No wiring problems in over 7000 miles. Thank you Etrailer for the parts and the coaching.
Tom D - 11/15/2022


I have a 2018 BMW X2 that did not come with a factory tow package. I had an etrailer hitch and 4 way plug installed last year and has been perfect since. I just recently purchased a camper and needed to have a Brake controller & Brake controller 7 way deluxe kit installed. My mechanic installed them with the detailed instructions that the units came with without any issues. The Tekonsha P3 is extremely user friendly and is working flawlessly. A bit overkill for my car being I can only tow max 3500 pounds, and my camper is 1 axel. this unit is rated up to 3 axles. I look at it like this way, when I trade in my BMW I will take my P3 with me. etrailer is amazing with the support & products they provide and I highly recommend them to anyone who asks me.

My Meghan said this was very easy to install, works great no complaints whatsoever.
Teresa - 12/24/2021


Converting the 4 way to seven way was straight forward, but the 4 way would not lock in place., either the rubber was to small or the metal bracket to big. It would just fallout a car wash would just rip it off. I had to make bracket to lock it in place. Quality problem


Very straightforward install on our Jeep JKU. Plenty of wire and everything you need for the job. Only dropped it down to 4 stars for 2 reasons: First the provided screws to attach the bracket to the chassis are garbage. Both snapped off in the holes and had to be drilled out adding quite a lot of time and swearing to an otherwise easy job. Secondly the bracket attachment for the 4 pin plug is laughably bad. It is so loose that I am sure it will spend most of its life dangling after it falls off.

Be careful how close the wiring is to the muffler in the rear. Don ask how I discovered this...
Scott - 03/02/2022


1 year review. I installed this product on my 2017 Toyota Highlander. As a person inexperienced with vehicle electrical systems, I found the installation challenging but achievable. I appreciated the advice and videos from I liked the final fit and finish on my vehicle when using manufacturer hitch and bumper kit.

After 1 year of usage, I have found 4 specific opportunities for improvement.

1. Water accumulation in the plug cover flap. After rain, I flip the flap up and water spills out of the crevice in the flap. There is also a small amount of water in the plug itself, but unclear if there is rain entering the socket or if this is from spillage when the flap is opened. This needs to be sealed to protect the plug!

2. Poor quality top mounting nuts and bolts. I overtightened one of the top bolts and it sheered off. I replaced it with zinc plated hardware. In my picture you can see after 1 year of use the included bolt on the left is corroded and the hardware store bolt looks new.

3. Poor quality front mounting screws. You can see the 4 rusting screws in the picture. These are designed to be exposed to weather, so I was surprised to find rust forming after the first few weeks.

4. Poor quality attachment point for the flat connector. The 4 way slips onto the side of the 7 way mount and is held on by rubber friction. It never stays in place and is always dangling.

One other suggestion is to offer a kit made for the newer wireless brake controllers. It could have less wire, fewer connectors, and cost less.

Because of the above problems I will have to replace the 7 way plug soon. Therefore I gave the product only 2 stars and would not recommend purchasing it.


Easy to install and works well. My only complaint: Why does the kit come with cheap screws that begin rusting with the first month? Why not charge 50 cents more and provide stainless screws?


People complain about the four pin plug mount and doesn’t hold the plug it just dangles. There’s pictures in the description that show a much better 7pin 4 pin combo mount. Very misleading you still get the crappy four pin holder.

I double checked and the photos on the page are an accurate representation of what should come with this kit. You should be able to snap he 4-way flat into the side of the bracket that comes with the kit.
-- Etrailer Expert Heather A - 09/27/2022


We purchased a new Hyundai Palisade that had an OEM hitch and “prewiring” for trailering. Unfortunately this prewiring was only a 4-pin connector so it did not include wiring for controlling electric trailer brakes. We finally convinced the dealer to install a 7-pin connector - if we obtained the appropriate parts from George J. at recommended this kit (#ETBC7) as the parts we needed for conversion to a 7-pin connector. The car dealer’s service department installed the 7-pin connector while we waited for 5 hours. With a wireless brake controller, everything now works properly for towing our Casita.

This photo shows the installation after I modified it so that the connector was above the hitch instead of below it (too close to the ground). I had to fashion a bracket for appropriate spacing and I left several bolts that attach it to the bracket (oops).


The kit had everything I needed to complete the installation. It has worked great over the first year. I mount this near the jack on the camper and i have not had any water issues.


Overall a great product that included more than what I needed to fully wire in a 7-way trailer plug on my 2001 Chevy Silverado. The only reason for not giving it a full 5 stars is the 4-way flat connector does not stay in position well. It's simply a rubber grommet that slides into the rectangular space in the metal bracket. It doesn't seem to stay secure and tight in that bracket for me, and I'd prefer it be a little more rugged and somehow fasten to stay absolutely motionless when plugging/unplugging a trailer.


I installed the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires on my 2008 F150. Installation was easy following the instructions provided they were easy to understand with a great diagram it took me 2-3 hours by my self and it worked great is was good to see all my lights were still working on the 20 ft Haulmark and the brakes worked perfect.


product was excellent and COMPLETE. everything you need with very DETAILED directions. i also ordered the prodigy P2 to complete my install. both were excellent and very recommended. only modification was on the actual plastic cover on bumper, i cut away minimal pieces with razor knife for perfect fit. you can look at all the pics to check out install. I took advantage of the reverse light wire and put LED light bar on back of trailer.

i made one email to e trailer for exact numbers for my make and model. the response was pretty impressive. Full detail with pictures and product numbers all set up so all i had to do was press order and pay for it. This is how american companies are supposed to be ran......I LOVE IT!!!!

Your products are awesome. Ive had zero issues with it and 5 of my friends purchased and installed the same set up in there trucks. Thanks again for the great products and excellent support.
matt - 03/05/2015


I received all the items and they appeared to be I good working order. I installed my brake controller and connected my camper. The only brake lights and turn signals worked. My friend and I investigated the 7 pin plug and two of the wires in the back were switched! I had to buy a new plug.


Returned when I realized there was already 7-pin cable and connector on my truck. Just needed the brake controller and "factory" cable to "plug-and-play." Thanks eTrailer.


The brake controller seems to work well on the jeep needed due to the weight of the trailer with only a 2 door the towing is very little mainly due to the stopping capabilities this makes me feel more confident towing the Camper and the wiring harness worked really well with very good installation instructions


I bought this to install on my Toyota Highlander for towing a camper with electric brakes. after spending considerable time with the installation, I attempted to hook up my camper. Unfortunately the 7-pin plug on the camper would not fully engage with the socket on the etrailer kit. The plug fits fine on several other vehicles I have used, with various brands of plugs. The problem seems to be that the pins are wider than normal and will not engage the slots in the plug. I called etrailer to ask for advice and the lady I spoke to said the kit was not designed to work on a Toyota Highlander. Obviously this is not the case, since the only interface with the vehicle is a 12v wire from the battery. I could not get the lady to understand this. She apparently knew nothing about the products she sells. I asked to speak to someone knowledgeable about the product and this person was more knowledgeable but just told me that they had never had a similar complaint about the kit. She offered to refund me the price of the plug (about $XX) but not the complete kit. Since I had already installed it, I couldn't return it in its original condition. I ripped out the kit and replaced it with one from U-Haul which works fine. So if you buy this, check to assure it mates properly with your camper or trailer before you install it.


Thanks to the video from Etrailer, I was able to install the kit. Very difficult to route the wires due to the Ford Escape, ( No fault of the kit). One word of caution. A colored photo of the wiring comes with the kit which appears to be the receptacle wiring and the 4 way plug. I was almost convinced the receptacle was incorrectly wired but learned the image was the trailer plugs view which is a mirror image of the receptacle. Be sure to ignore that page!


The controller is great. The round connector is disappointing. The mounting screws immediately and the 4 pin connector falls out of it’s retainer every time.

by: 07/26/2021

Very satisfied with the product.Tara G rushed my order and I had my ground delivery in 2 days. Thank you.”

Good Not Great! The fact that the unit cones with all the hardware is great! The plg is Made in China like everything else we buy. You can see picture I used bolts from my garage to secoure it to the frame instead of the plastic. The 4 way plug dangling is annoying.I have seen a puddle of water inside the 7 pin plug. I may need to install an o-ring on the spring door. It may be easier to drill a smaill 18 weep hole in the bottom of the receptacle
John M - 07/27/2022


Very not happy was not wired right from factory. I had ordered long before my camper trip but life got busy and it wasn't until months after I ordered I installed and realized it was wrong from factory... Life is still busy so I never got a chance to follow up... I have been a customer for multiple vehicles and in most am happy, to be fair I never got a chance to warranty this or try to since months had gone buy from purchase to installation. See picture you can see it was off by one. I couldn't figure out the problem until I opened it up, the screw type picture is the cheap one I had to get for my trip but is wired correctly the sealed one is the one this company sold me (higher quality but for me unfortunately worthless)... Ps the cheap one that I had to buy from box store is now corroded and broke, but it's wired are from 4jul21 when I wired a day before my trip.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 05/31/2022


I purchased this 7-pin connector for my 2007 FJ Cruiser. I was excited to get this installed, and found that the wiring was solid. I chose to cut the 4-pin connectors off of my FJ and this adapter. The fewer plugs the better! I like to solder and shrink wrap me connections. While the plug and wiring are really nice, the mounting bracket is junk. It’s very thin metal which appears to be simply painted, not powder coated. It also has a notch on the side for the 4-pin connector. This is the worst part. The rubber around the 4-pin is grooved, presumably to fit into the notch in the mounting plate. But it is not secure at all. The 4-pin simply falls out and dangles even with nothing connected. And there is no way to secure it. This is a significant design flaw.

Thank you for your review! It actually looks like you have that bracket on the wrong side of the 7-Way. The right side is a little wider so if you flip it to the left side youll have enough room for the 4-Way to fit properly.
-- Etrailer Expert Jon G - 05/08/2021


Works great! Take extra care to route cabling far away from exhaust system. The wire loom I ran up to the battery I found to be deformed after using for awhile, apparently due to heat from the exhaust - not make sure you route it carefully!

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