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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
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etrailer Trailer Brake Controller - ETBC7
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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. Call 800-298-1624 to order etrailer accessories and parts part number ETBC7 or order online at etrailer.com. 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.


Features:

  • 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


Note:

  • 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 (ETBCXW - 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 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   (2266 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.

- ETBC7
by:

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.


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


- ETBC7
by:

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 etrailer.com. George J. at etrailer.com 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 etrailer.com bracket (oops).



- ETBC7
by:

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 etrailer.com. 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.



- ETBC7
by:

About a year ago, I purchased a brake controller and parts to install a 7-pin trailer connector on my Ford Edge. The installation all went well and I used the Dielectric Grease to seal the wire connections at the connector. My four-star rating was given simply because I don't know if the grease is working as I hope it is. Time will tell more years down the road. As a side note, I made an additional bracket to enclose both connectors (4-pin & 7-Ping, see photo) to keep the 4-Pin connector from sliding out of place because it was only retained on three sides without my bracket.



- ETBC7
by:

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.


Comments
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


- ETBC7
by:

The installation videos and instructions provided by etrailer are exceptional and are one of the main reasons why I purchased this kit. My second reason for purchasing this kit rather than buying everything local was for the duplex wire which I could not find local unless I was willing to use outlet wiring or two single wires. There are two things I don't like about this kit and two things that just bothers me. First the duplex wire I wanted so bad is too short. I had to mount my controller on the left side of steering wheel just to have enough wiring. Second the wiring on the 7/4 way connector isn't even a foot long so I had to remove the large ring terminal carefully and install it on a piece of white white I cut from running the duplex from the back to the front and use a buck connector to join it to the white wire on the 7/4 way connector. Once I did that I was finally able to ground the connector to my frame. As well I don't like how the 4 pole connector can easily fall off the bracket. It makes the connector look cheap. Lastly, they should really include the No-Drill Mount 18140 with the kit. Thankfully I was able to use my old mount for my existing 4 pole. So if the duplex wire had been two feet longer and the kit included a better 7/4 way connector I would give this a 5 Star rating.



- ETBC7
by:

Let me start off by saying that the service at etrailer was great; however, the initial product delivered was not. The harness was wired incorrectly, the 40A circuit breaker wasn't included and the jacketed wire in the kit won't work on a Jeep wrangler without an addition length of cable. I would have known this if I watched the whole install video but the inconvenience of getting everything from etrailer in the mail was out the window, as I had to go buy the breaker and wire from [auto parts store] for some towing I needed to get done. All that said, they did end up replacing the faulty harness and sent me a replacement 40A Circuit breaker, though it's not exactly the easiest item to uninstall and swap out. The only item that is just bad and wasn't able to be corrected is the 4-pole connector fit in the bracket. The cutout in the bracket for the 4-pole is too large for the connector, it falls right now. I wrapped the connector in electrical tape so it would stay wedged in but still comes out about once a week. The cutout in the video is tapered like the stock jeep 4-pole bracket but the one pictured and included in the kit is not. Big shout out to Vicki for working with me to get the replacement items sent out.



- ETBC7
by:

The Curt Spectrum Brake Controller works great for my 2008 Toyota Highlander. I mounted it on the front of the console armrest compartment behind the cup holders (facing forward). I was easily able to route the wiring out the bottom of the console and access the module under the drivers seat (be very careful installing the pins into the clip, they are very fragile). Then I ran the wires under the bottom edge of the console and out through the fire wall (Be very careful drilling your hole through the firewall. I caused some damage I had to have repaired}. Also, the help I had from Yolanda, making sure the kits I needed were compatible, was extremely important because I was leaving for a cross country trip later that week. She was wonderful and everything worked great for my trip. Thank you etrailer. I'm a regular customer and will remain so.



- ETBC7
by:

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!!!!


Comments
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



- ETBC7
by:

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.



- ETBC7
by:

The components are very good for the most part. The ground wire needs to be a lot longer as I had to splice in about 16" from the left over cable and supply another crimp terminal. The strain relief and wire cover that came assembled on back of the plug did not allow mounting in line with the hitch so had to mount below so the wire bundle would clear the hitch. The video showing installation on a 2011 Ford escape was a great help.



- ETBC7
by:

Great kit, made things very simple and it is very well made, wires from receptacle could have been 3 inches longer, but did the job



- ETBC7
by:

Installation for a brake controller. Length of wire was fine with some spare for 2009 Tacoma with access cab. Exactly what was expected and working with no issues.



- ETBC7
by:

This is a nice kit, however,I'm returning it for a different kit. This one requires splicing into the brake light switch, and the other more expensive is plug and play. My mistake, I was in a hurry to order, and ordered the wrong one


Comments
Thank you for the review! Here is a plug and play that works with a 2019 Kia Sorento with a factory tow package. It is part # TK24FR
Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector
$198.51
.
-- Etrailer Expert Brooke M - 10/18/2021


- ETBC7
by:

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.



- ETBC7
by:

Purchased a Teckonsha Voyager brake controller and the ETBC7 install kit. The instruction an video were very clear and easy to follow. Installed on a 2007 Ford Ranger Sport. Tech support was also very helpful on the one question I did have.


Comments
Products have functioned as advertised. No problems and still operating as they should.
David - 11/08/2020


- ETBC7
by:

This set up will work for those who want a dual plug bumper mount plug setup. I give three stars for two reasons: 1) There are 4 screws surrounding the 7 way plug. They are not plated and rusted within days. Because they are visible, it makes it look cheap. 2) The 4 pin is not integral to the unit. Basically, it is pig tailed in at the wires and the flat plug itself is intended to pinch between two metal ears on the side of the 7 way plug. You can not plug in and unplug the 4 flat with one hand because it will not stay in place. Outside of these issues, it does the job.



- ETBC7
by:

Included everything needed to wire the control unit for the electric brakes on my sailboat trailer. Installation of the 4-wire flat plug & the 7-pole plug was a snap. The hardest part of the whole installation was running the wire from the plug at the back of my 2015 Subaru Outback to the engine compartment, because I chose not to just run it outside underneath the car, but rather inside along the floor/ door jambs driver side; but it was very do-able and made for a very 'clean' install. Subarus have a factory installed plug to connect a 4-wire flat trailer plug (easy), but nothing for a 7-pole plug as they are not normally used to tow a trailer large enough to use electric brakes. However, the brakes on my trailer had been converted from hydraulic to electric by the previous owner. The Subaru brake switch has 5 wires coming out of it, so I had to go to the dealer and ask them to identify the specific wire I needed for the brake control to be correctly wired. Done, done, & done. :-{D


Comments
A year later & still totally satisfied. Even recommended the same setup from etrailer to a friend he bought it too, & his experience has benn like mine.
Mario - 06/17/2021


- ETBC7
by:

This is a great product. I think etrailer made it easy for our novice DIY. I basically read the instructions and watched video a few times before I start. The installation is not difficult; it is just a dirty and tiring work. One thing I should mention, is that grounding is very important. I wasted most of my time for not properly grounding. The first place you encounter the issue of grounding will be when you test the break wire in the box under the dash to the left side of the steering column. Using the tester, you must find a bare metal part for grounding, otherwise the other end of the tester would lit up properly. This is not mentioned or emphasized in the video or written instructions. Painted surface won't do since it insulates the metal. I spent a lot of time trying to figure out why the break wire won't lit up, calling etrailer customer service representatives, nobody really told me this. I basically figured out by myself. Hopefully you won't need to waste time on this. The second place you will encounter grounding is in the front engine box near the battery where you must drill into the frame to attach the ground wire, like instructed by etrailer. But I didn't like to drill "unnecessary" holes into my frame, I just used a ziptie to attach the ground wire to the frame, so grounding wasn't good. I eventually figure out I must drill into the frame to get to the bare metal for grounding. The 3rd place is in the back, there is another ground wire you must drill into the frame to reach bare metal. I choose to drill into the tire tub, since it won't affect the structure integrity of the frame rails. Either way it will work as long as you drill into the bare metal. The wires supplied by etrailer is long enough for this installation.



- ETBC7
by:

Overall, this is a good kit, and is much better than having to do it from scratch. I mounted this on a 2016 Chevy Express 2500 with a DrawTite class V hitch. This kit did not come with an L-bracket to mount the receptacle to a hitch like they show in the video. But, you can get one from etrailer. I fabricated my own L-bracket and mounted it upside down so it would be protected from road debris by the hitch itself. It made the receptacle fit perfectly against the bottom of the bumper. (see pic) You will also need a couple extra blue butt connectors for this particular vehicle that are not included in the kit. It would also be nice if the kit came with a few more feet of wire covering to use under the hood. I would recommend following the video carefully when installing the Tekonsha Prodigy 2 controller. It's a great video.


Comments
Product still works great.
Steve C - 05/21/2020


- ETBC7
by:

Just upgraded to a 2016 Odyssey and need to tow my camper. Purchased the OEM hitch and OEM custom harness (from car to 4 pin on hitch. OEM Hitch comes with nice beefy flange where the 4 pin connector mounts. But I needed a 7 pin for electric brakes and bought this ETBC7 kit to do the job. I ended up cutting a custom hole in the bumper cover and figuring a way to mount the bracket in this kit directly to the OEM hitch. Wanted to share photos of the install for anyone else in the same boat. Advantage of my install is that the 7 pin is mounted above the bracket, protecting it from injury from low clearance obstacles on the road. One Con, is I had to mount it upside down so it didn't interfere with the metal bumper under the bumper cover. One issue I remember is that the Ground wire on the 7 pin harness didn't come close to reaching an available frame member, at the side of the car. I had to cut off the ring lug and extend it out to the edge of the car to complete the install. But it is done now!



- ETBC7
by:

This seemed to work pretty much as expected. Installation takes much longer than indicated on the sales info videos etc. I expected that, it just takes more time for a DIYer to verify all the wiring connections are correct, before actually cutting and connecting things (measure twice, cut once). I am not sure about the use of auto reseting circuit breakers here. In a serious fault, they will just continue to reset, automatically, until the circuit breaker fails; OPEN - no problem, OR ... CLOSED - something burns up. I chose to add #14 fusible links on the battery side of these circuit breakers to assure a safe fault should one occur. Will see over time if this was a good choice.



- ETBC7
by:

I just got it and I am super excited to install it. I reviewed the installation instructions and they’ve also done a really good job with providing videos on their site of different installations. Also a really quick from order to delivery.



- ETBC7
by:

The installation is pretty straightforward and didn't take too long. The biggest issue with the kit is that the screws used to mount the 7-way/4-way bracket to the car are already rusting through pretty heavily after less than one year. I don't live near the ocean or up north where salt is a factor. I would have liked to have used a different set of wires instead of stretching out the left-over cable and running it back through the firewall in my vehicle, too. For a budget kit, I would have paid a bit more for it to all be done correctly. The 3-way clips used to attach to the factory brake wire are also not the best and I found myself troubleshooting my controller multiple times to ensure that these were making a solid connection. I recommend soldering for a more stable connection there, but that type of thing should be left to professionals. Just make sure you have a good bind on that connector and the kit will do just fine.



- ETBC7
by:

Make sure you crimp everything well! After working great for a year, ended up paying (last second problem before a trip) to have a dealer diagnose why none of the lights worked at all when they had been fine up to that point. The left rear passenger-side area (jack storage etc, so occasionally things get moved around) wiring had the black power wire pulled out of the crimp, which had not been tight enough, causing all lights to not function.


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  • What Trailer Wiring Do I Need on My 2021 Jeep Grand Cherokee (Without Factory Tow Package)?
    For setting up your 2021 Jeep Grand Cherokee (without factory tow package) for wiring, you will first need a 4-way harness. For a 4-way that is compatible with your vehicle, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C62VR. The Curt connector will allow you to install a 7-way into your vehicle for the functions you need for towing if you need those functions. For a 7-way, once you have the 4-way installed, you need the Universal Installation...
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  • 7-Way and Brake Controller Kit for 2017 Chevy Express 3500
    The kit you mentioned is essentially a t-one style 4-way kit with a 4-way to 7-way kit like the # ETBC7 so to replicate that you'd just want the # 55540 with the # ETBC7 and a brake controller of your choice like the # 5535 and you'd be set.
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  • Can Hitch Crossbar Be Drilled Into to Install Trailer Connector Mounting Bracket
    It's not recommended to drill holes into the hitch crossbar, as it would weaken the hitch to an unknown degree which would be unsafe. I'd recommend using a no-drill bracket, part # C57202 which would attach to the hitch crossbar using a pipe clamp without needing to drill any holes. The bracket included with the # ETBC7 would bolt directly to the # C57202. I'll link you to a video showing how the bracket works.
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  • Parts Needed to Convert 4-Way of 2007 Ford E-350 to 7-Way and Install Brake Controller
    Since you have a 4-way on your 2007 Ford E-350 you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well. For a brake controller I would recommend the Draw Tite iCommand # 5535. This is one of our best selling brake controller because of how well it works and how easy it is to setup.
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  • Parts Needed to Install 7-Way and Brake Controller in 2017 Jeep Wrangler Unlimited with 4-Way
    We have a kit specifically designed for converting a 4-way like what you have installed on your 2017 Jeep Wrangler Unlimited to a 7-way and comes with everything needed to install the brake controller with the part # ETBC7. This would be the kit I would recommend you use to install the Redarc Tow Pro Elite # RED44FR that you mentioned. The wiring kit you mentioned # 5506 is part of what comes with the ETBC7 too so you would not need that in addition to anything.
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  • Installation Videos & Instructions for ETBC7 Brake Controller Installation Kit
    We have produced many different videos for the # ETBC7 brake controller installation kit. While we do not happen to have one showing your specific 1999 Chevrolet Blazer 2-door rear-wheel-drive version the overall process will be essentially the same on any vehicle. For reference I have linked two videos showing a 2001 Silverado and a 1993 Suburban as examples. I also linked you to an article that covers the complete ETBC7 installation process. Between the two videos and the article...
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  • Brake Controller and 7-Way Connector Installation in 2000 Chevrolet K2500
    In order to install a brake controller and 7-way trailer connector in your 2000 Chevrolet K2500 pickup you will first need to have a working 4-pole flat trailer connector and wiring harness in place, such as the TowReady Custom Fit Harness # 118315, which plugs in along the driver's-side frame rail. This 4-pole provides basic lighting functions (stop, turn and tail lights) for your trailer. Next you will need an electric trailer brake install kit, part # ETBC7, which includes the 7-way...
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  • How to Determine Stop Light Switch for Brake Controller Install on 2018 Toyota Highlander
    When installing a brake controller, the only way to determine the cold side of the stop light switch on any vehicle, including your 2018 Toyota Highlander, is to use a circuit tester such as the very handy Cordless Circuit Tester # PTW2979 and find the wire that only has voltage when you press the brake pedal. If you take a look at the linked video we did installing the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 with the Pigtail Wiring Harness # 7865 on a 2018 Toyota Highlander,...
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  • Installing 7-Way Connector and Brake Controller in 2013 Hyundai Santa Fe with 4-Pole Connector
    Adapting your 2013 Hyundai Santa Fe that has a 4-pole flat connector for towing a trailer with electric brakes is a straightforward process. Many of our customers tackle this task themselves by using our articles and videos for guidance but professional installation of course is an option. First you will need a brake controller. The Curt Echo # C51180 that you referenced is one option. We do recommend a proportional-type unit like this or the popular Prodigy P2 # 90885 as they will help...
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  • Brake Controller Installation Recommendation for a 2011 Toyota Venza
    Since it sounds like you already have a 4-way trailer wiring harness installed on your 2011 Toyota Venza all you would need to install the Prodigy P3 part # 90195 is the part # ETBC7. This kit comes with everything needed to convert the 4-way to a 7-way and install the brake controller. I attached an install video and instructions for you to check out as well. If you didn't have a 4-way you would need the part # 118482 as well.
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  • 7-Way Wiring Kit For 2004 Toyota Tacoma
    You may need a 4-way Modulite Vehicle Wiring Harness Kit with 4 Pole Trailer Connector # 118379 to work with your Tacoma. This connector plugs directly into existing wiring no cutting, splicing or tapping required. If your truck already has a 4-way then this is already taken care of. Once you have a 4-way, the Universal Installation Kit for Trailer Brake Controller 7-Way RV and 4-Way Flat 10 Gauge Wires # ETBC7 is what you need to convert the 4-way to tow a trailer with a 7-way plug....
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  • Parts Needed to Install Brake Control on 2014 Ford E-350 with or without Factory Trailer Connector
    If your 2014 Ford E-350 van came with a factory installed 7-Way or 4-Way trailer connector then it will have a port to plug in a brake controller. The harness you will need is # 3034-P for Tekonsha brake controllers. I recommend the P2 # 90885 because it is easy to set up and use and it is reliable. If you do have the factory 4-Way then you will also need to add a 7-Way using # 37185 to complete your wiring. The brake (blue) wire will need to be manually run from the brake controller...
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  • Recommended 7-Way Wiring For 2012 Toyota Highlander And Multiple Trailers
    Since you already have a 4-way flat connector, I recommend using the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires, # ETBC7. This kit will simply plug into your current 4-way and give you a 4-way and 7-way connection option. The 3 remaining functions of 12V power, electric brakes, and reverse lights can be connected or saved for a later time. I recommend making the connections and being ready for the future towing of a trailer with...
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