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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. 4 Flat
  5. Trailer Hitch Wiring
  6. Powered Converter
T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # 118558
Our Price: $86.29
Custom Fit Vehicle Wiring

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118558 - 4 Flat Tekonsha Trailer Hitch Wiring
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Quickly and easily install a 4-way, RV-style trailer connector on your vehicle with this custom harness. T-One connector plugs into OEM tow package wiring harness - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118558 or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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Tekonsha Custom Fit Vehicle Wiring - 118558

  • Custom Fit
  • 4 Flat
  • Trailer Hitch Wiring
  • Tekonsha
  • Powered Converter

Quickly and easily install a 4-way, RV-style trailer connector on your vehicle with this custom harness. T-One connector plugs into OEM tow package wiring harness - no cutting, splicing or tapping required.


Features:

  • Provides a 4-way flat trailer connector at the back of your Honda Pilot to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole, and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Tow harness with 4-way connector plugs into connection point behind rear bumper
    • Converter connects in rear cargo area
  • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn light: 4.2 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness. The connection point for the 4-way harness is located behind the rear bumper. The converter plugs into the factory wiring harness in your cargo area, on the driver's side. The included relays then plug into the converter harness. Once you've plugged in the connector, insert the included fuse into your fuse panel as indicated in the instructions.


Product detail

Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-way connector itself - to help prevent corrosion.


ModuLite Powered Tail Light Converter

A ModuLite power module is built into this T-One connector. Because most trailers run on a 2-wire system - wherein the brake and turn signals are carried on 1 wire - the separate brake and turn signals from your vehicle's 3-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



118558 Tow Ready T-One Vehicle Wiring Harness

Installation Details 118558 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118558

Average Customer Rating:  4.8 out of 5 stars   (299 Customer Reviews)

Quickly and easily install a 4-way, RV-style trailer connector on your vehicle with this custom harness. T-One connector plugs into OEM tow package wiring harness - no cutting, splicing or tapping required.

by:

Correct fit easy install instructions working like a champ .

James

4/22/2024

Followed the directions and it is doing great



by:
2013 Honda Pilot

Quality parts , Good instruction video for help in the installation
Installation went smoothly
Only difficult part was the dummy cap on the wiring plug at the rear bumper, kinda difficult to remove
As for the parts and instructions, flawless
Thank you for providing the parts that I needed



by:

This product worked perfectly for my 2013 Honda Pilot. The directions were crystal clear and the installation was straightforward (easy). The process may have taken 30 minutest to complete, but I was not rushing.

J

7/12/2023

After a year, this product has been solid and held up to multiple trips. Thank you!!



by:
2013 Honda Pilot

excellent product and everything fit as intended.



by:

I am extremely satisfied with product. Took me less than 30 minutes to install. I will admit I watched some [online] videos about installing this product before, therefore I already knew what I was doing. Hardest part was to remove safety cap underneath the rear bumper to connect wiring together, however it’s a Honda difficulty, not etrailer one.
Thank you very much. Tested, it’s working excellent.



by:

Super easy installation! Just watch the video. Can’t wait to tow our boat!



by:
2014 Honda Pilot

This wiring harness was the perfect fit for my 2014 Honda Pilot. The tail lights on my trailers work perfectly. Best price and best service! Thanks!



by:

Amazing. Everything fits perfect. No cutting no hassle. This was a missing piece to my 2014 pliot ex-l. I thought the pilot came ready to just hook up a trailer and go. But come to find this is what was missing. I got on the phone with etrailer on a Sunday afternoon. Lady was really nice and answered my questions. The only thing I would like for there tp be free shipping with no price minimum.



by:

Worked perfectly. Your installation videos are a game changer!



by:
2014 Honda Pilot

Easy install, great video to walk you through the steps!



by:

This wiring harness was very easy to install. Took me approx 20 minutes. The price was a bit higher that some of the other wiring harnesses but ease of installation is well worth the extra money spent.



by:

The install was delayed, stalled, waylayed and stopped because of the EVIL connector cap ( see picture ) that would not come off.



by:

Works like it's supposed to, which is the best part. No surprises. Instructions were easy to follow and installation encountered no major hiccups.



by:

My wiring harness works exactly as is should. A very nice product, indeed.



by:

Fantastic product. It is litterally plug and play. I don't know the technical names for the pieces included, but I will try to explain a couple of important parts to the install. *1. For the the install of the single colored pinkish fuse. There are TWO fuse boxes located under the hood. You are looking for the one located right behind the radiator at around the mid point. It is smaller than the obvious looking fuse box located to legt, above the wheel well. That had me stumped for about 5 minutes. **2. Large black cable with the white plug end on one side and black plug end on the other is next. The kit comes with two loose black fuses. those plug into the the BLACK end to the cable mentioned above. There is a image of the auxilary panel you need to remove that comes with the package. Located behind the rear passenger, driver side. Once you removethe panel you will see the matching white end plug. about a good 8" straight back. I used a flash light, the inside of the panel is pretty dark. I didn't tie it down my hands were to big to get in there and do all of that. FYI,Does not rattle or make any noise. ***3. Now the tricky part. There is a gray cap (matches the the gray pug located on the final cable) that needs to be removed from underneath the rear bumper, driver side. Remember, you are laying down and looking up. There is a small lever located on the gray plug. I belive it is located on the back side of the gray plug. You need to hold the small lever down and slide forward at the same time. After you plug in the last cable. You can try to zip tie the cable on the bumper. But I was not able to locate any secure spots. I just snaked it around, and tucked it in behind the hitch. Hope this helps, oh and I am no english major. So sorry if my grammar offends anybody hahaha.

Dave W.

4/26/2015

I too love this aftermarket plugplay system. Installation took all of 30 minutes only because I am old and it takes time to get up and down from the ground! You will need a flashlight, straight bladed screwdriver and nothing more! The only other items needed are WD40 or PB Blaster to used to lubricate the cover on the grey plug behind the rear bumper. This will make it much easier to remove and a couple of small dabs of dielectric grease for the plugs!

Eric F.

8/4/2015

Thanks Arnold for posting this...i didn`t see the second fuse box either ...your posting saved me a bunch of time



by:
2013 Honda Pilot

Package included everything required for installation. Instructions were clear.



by:
2012 Honda Pilot

The wiring harness number 118558 for my 2012 Honda Pilot went together pretty much as advertised with two exceptions. When the access panel is removed, there is a bracket that the black box should slide onto. I had to file the bracket so the black box would fit. Not a big problem. The real big problem came when trying to remove the dummy plug under the car. After much wasted time and energy, I finally pried the clip loose from the frame and took it apart. I then removed the dummy pug quite easily, inserted the 4 plug harness fitting and reinserted the clip back into the frame. This step should be included in the instructions as the dummy plug CANNOT be removed without that clip being taken apart. Also, the mounting brackets # 18144 and # 18140 are not needed. There is a molded 4 plug bracket as part of my plastic bumper.

David M.

5/11/2014

Hi Oscar C - can you upload a pic of this mounting location? Would love to see your installation. Thanks



by:
2013 Honda Pilot

The wiring harness (Item: 118558) was very easy to install in my 2013 Honda Pilot. I also purchased the 4-pole flat mounting bracket to make my installation simple and neat. Instructions included in the kit clearly identifies each item in the kit, and which connectors to connect to the factory pre-wired connectors.

David M.

5/11/2014

Hi Bill - Where did you mount the bracket? Can you share pix? Thanks.



by:
2012 Honda Pilot

Product is excellent, directions are very weak! The web site picture of kit shows the black box plugged into the grey plug on harness but it is not delivered that way. Directions state to plug black box into access opening in rear driver side access. if I had not gone to the web site and saw the picture there, I would have been lost, you have to plug black box into grey plug on harness and plug the white end of harness into access plug. There are no directions on where to plug in relays I had to find that myself. I did post a video on YouTube under etrailer 2012 honda pilot wire harness.

Jay

7/3/2014

Great video Victor, Thanks! Etrailer should comp you!



by:
2015 Honda Pilot

I was certainly pleased with the staff and their expertise on answering questions on the product and the efficiency of the delivery shipment. The product was easy to install and managed to eliminate the problem I had with my new vehicle with LED lights and connecting to my trailer which had the old lights. The result is the product is working great and I have confidence in etrailer products and staff. Thank you.

Paul C.

10/17/2018

One year after installation and all is well.



by:
Honda Pilot

The most time consuming issue was removing the cap from the HONDA PILOT harness connector. The e-trailer wiring harness installed just as advertised. Highly recommend.

Adrian

3/13/2015

Works great, use it all the time.



by:
2012 Honda Pilot

Ordered the harness on Friday night, got it on Thursday, and had it installed and functional within 30 minutes after I opened the box. All the parts fit correctly and the control box even had the right tabs to mount where the factory unit mounts behind the panel. VERY pleased in all regards,

John

10/7/2014

It has continued to work correctly - I could not be happier with my purchase.



by:
2014 Honda Pilot

Got this for my 2014 Honda Pilot. Worked great. Entire install probably took 20 minutes.

The longest part was getting the factory cap off of the grey connector under the bumper. Took a while to realize there were two clips that needed to be pressed. One on the bottom and one on the top.

Other than that this was a great product at a good price, and worked like a charm!

Toby D.

7/9/2015

Thank you for the follow up Rachael. Everything is working fine with the harness. No complaints.



by:
2015 Honda Pilot

It took me a couple of hours to get the wiring harness installed. It would have been faster but I am 68 years old and don't have a lot of strength in my hands. Getting the cap off of the existing connection in order to connect the new plug was the most difficult part. The new plugs snapped into place easy enough.

David H.

4/10/2022

Although I dont pull a trailer that often the trailer wiring is still working and Im glad its available when I want to use it.



by:
2013 Honda Pilot

The installation of the wire harness could have only been easier if I had little boy hands! The space Honda leaves for harness is kind of tight. It took me longer to collect a few tools and something to lay on than it did to actually install the harness.

Stan W.

2/20/2015

Still working perfectly. Thanks


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Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • 4-Way and Mounting Bracket Recommendation for a 2012 Honda Pilot
    The most popular 4-way mounting bracket we offer that other 2012 Honda Pilot owners use is the Mounting Bracket part # 18144. To see how it installs check out the install video I attached. The 4-way wiring kit you would want would be the part # 118558.
    view full answer...
  • 4-Way and Mounting Bracket Recommendation for a 2012 Honda Pilot
    The most popular 4-way mounting bracket we offer that other 2012 Honda Pilot owners use is the Mounting Bracket part # 18144. To see how it installs check out the install video I attached. The 4-way wiring kit you would want would be the part # 118558.
    view full answer...
  • Trailer Wiring Recommendation for a 2014 Honda Pilot
    In terms of trailer wiring for your 2014 Honda Pilot it doesn't really matter whether or not you have the tow package. For a 4-way for your vehicle you would want the # 118558 or for a 7-way part # 118265. Either wiring harness will work for you regardless of your tow package status.
    view full answer...
  • Parts Needed To Install A 7 Way On A 2015 Honda Pilot
    We definitely have what you need to get a 7 Way installed on the 2015 Honda Pilot you are working on. However, the correct pieces will depend on if the Pilot has the factory towing package or not so I did include both options, just in case. I included some install and review videos for you to check out on each product as well. If it does have the towing package that originally included a 7 Way plug, the Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector...
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  • 4-Way Flat Trailer Wiring Harness for a 2012 Honda Pilot to Tow a Small Trailer
    We do have a trailer wiring kit for the 2012 Honda Pilot that includes a 4-Way flat wiring harness. However, to make it fully functional you do need all of those parts you see. The 4-Way version is # 118558. The reason all of the parts are needed is because there is no converter or relays connected at the forward installation point, see instructions, on the vehicle. Without that installed, there will be no power going back to the 4-Way.
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  • Availability of Rear Mount Trailer Hitch for 2012 Honda Pilot
    The 2012 Honda Pilot should have been equipped with a factory trailer hitch, which is why you're unable to find an aftermarket model. Check the rear bumper fascia for a removable panel or door that is hiding the hitch receiver. Once removed, the receiver tube should be visible. If you crawl under the vehicle and look up at the underside right behind the rear bumper, you should be able to see the hitch. If your friend is planning on using the hitch for towing, a trailer wiring harness...
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  • Trailer Wiring Recommendation for 2014 Honda Pilot
    We have two trailer wiring options for your 2014 Honda Pilot. If your trailer has a round plug on it with 7 pins what you need is the part # 118265 as it is a confirmed fit. If instead your trailer has a flat 4-way connector you would need the # 118558 instead.
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  • Recommended Brake Controller And Wiring For 2012 Honda Pilot
    For you to safely tow the RV with brakes, you will need a brake controller and the trailer wiring for your 2012 Honda Pilot. I can help you out with everything you need. First, if you do not have a 4-way connector at the back of your Pilot I recommend part # 118558. This harness plugs into the vehicle wiring located behind the rear bumper. You then need part # ETBC7. This plugs into the 4-way connector and you will then need to finish the wiring as shown in the attached drawing. The...
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  • Trailer Wiring Harness Options for a 2012 Honda Pilot with or without a Factory Tow Package
    The wiring harness fora 2012 Honda Pilot that did not come with a factory tow package (that would have included a trailer connector) is # 118558. I have included a link to the installation instructions for you. this will provide you with the basic light functions used on a trailer: left and right turn signals, brake lights, and running lights. Wiring harness # 118265 is designed to replace a broken or lost OEM trailer connector if the vehicle came with one from the factory.
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  • Trailer Wiring Harness Options for 2013 Honda Pilot EX-L
    We offer trailer wiring harnesses for your 2013 Honda Pilot whether or not it came equipped with the factory tow package. The simplest way to find out how your vehicle is equipped is to provide your VIN to your local Honda dealer; he can look up the VIN to see how the vehicle was equipped from the factory. However, the two parts noted below will work in either case. If you need a 4-pole flat trailer connector on your Pilot you can use Tow Ready harness # 118558. If your trailer needs a...
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  • 4-Way Recommendation for a 2014 Honda Pilot with Factory 7-Way
    Sounds like you have the factory 7-way on your 2014 Honda Pilot and you are looking for just the square connector and 4-way harness to replace what you have on your vehicle. I wish just that piece was available but our manufacturers don't offer that as a replacement part unfortunately. Best solution is just to use an adapter like part # PK12716. This plugs into the 7-way and converts it down to a flat 4 like you need.
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  • How Do I Know If My 2013 Honda Pilot Has Factory Tow Package
    If your 2013 Honda Pilot has the factory tow package you will find a connection point for the 4-way harness, like the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # C56170, which you referenced, located behind the interior access panel in your rear cargo area. To install the harness will need to make two connections: The tow harness with 4-way connector plugs into the connection point behind rear bumper, driver's side (see S5). The converter...
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    Image 1 for
  • Trailer Wiring Harness Recommendation for a 2005 Honda Pilot
    For your 2005 Honda Pilot the trailer wiring harness part # 118336 has been confirmed as a fit and would work well. I looked up the part number you referenced and it looks like the part # 118558 which is for newer Honda Pilots. I attached an install video for you to check out as well.
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  • Wiring Harness for 2012 Honda Pilot with Factory Hitch
    We have great wiring harness options for your 2012 Honda Pilot. If your trailer has a 4-Way flat trailer connector, you will want the Tow Ready T-One Vehicle Wiring Harness # 118558. This wiring harness for your Pilot will not require any cutting or splicing of wires to install. The converter and converter harness will instill inside the cargo area behind a panel and the 4-Way harness will install into a gray plug under the vehicle bumper on the driver's side. If your trailer has a...
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  • Availability of 7-Way Trailer Wiring Harness for 2015 Honda Pilot
    The Tow Ready # 118265 is indeed compatible with all models of the 2015 Honda Pilot. Once the plug and play installation is complete, you'll have a fully functional 7-way trailer connector that will operate all the lighting on your trailer. At some time in the future, should you want to tow a trailer that's equipped with electric or electric over hydraulic brakes, you can install a brake controller like the Tekonsha Prodigy P2 # 90885 using the # 3070-P brake controller wiring adapter....
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  • What Plug-In Wiring Harness do I Need to Use the Tekonsha Primus IQ # TK90160 on My 2015 Honda Pilot
    Since you input your vehicle into our fit guide, I believe you are referring to your 2015 Honda Pilot's factory plug. When looking at the available instructions for the compatible wiring harness # 118558, the plug location on your vehicle is in a compartment that is accessed by opening the rear door on the driver's side. It is inside the panel that is labeled "AUX FUSE." I went ahead and included photos and instructions about how to gain access to your plug.
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    Image 1 for
  • Tekonsha Primus IQ vs. Prodigy P2 or P3 Brake Controller and Parts to Install on 2012 Honda Pilot
    Both brake controllers will work with your 2012 Honda Pilot, but let's start with what you need to install them, which is just a couple of components: - 4-Way: T-One Vehicle Wiring Harness # 118558 - Universal Installation Kit for Trailer Brake Controller # ETBC7 These parts will give you the wiring needed to use the Tekonsha Primus IQ # TK90160, Prodigy P2 # 90885, or its most recent iteration, the Prodigy P3 Trailer Brake Controller # 90195. The differences are essentially the superior...
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  • Can Tekonsha T-One 118265 be Used on 2014 Honda Pilot with Adapter for 5-Way on Boat Trailer
    Yes, you can replace the T-One # 118558 with the T-One # 118265 on your 2014 Honda Pilot and then use an adapter like the Tow Ready # C35FR or the Hopkins # HM47570 so that you can still activate the reverse light circuit while towing your boat trailer. I have attached the installation instructions to this answer page for you to check out as well.
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  • Will TowReady Trailer Wiring Harness # 118558 Fit 2015 Honda Pilot Without Tow Package
    The trailer wiring harness you referenced, part # 118558, is a confirmed fit for your 2015 Honda Pilot without the tow package. We also offer a harness from Curt, part # C56170. The Tow Ready harness # 118558 offers a substantially higher current output rating of 7.5 amps per circuit, so if your trailer has a lot of lights I suggest this harness to avoid any potential overload issues.
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  • Would the Pollak 7 Pole to 4 Pole Connector Adapter # PK12716 work on a 2014 Honda Pilot
    As long as your 2014 Honda Pilot has a 7-way on it yes, the Pollak 7 Pole to 4 Pole Connector Adapter # PK12716 would work well for you. Check out the review video I attached for this product as well. If you have no trailer wiring you would want the Tow Ready Custom Fit Vehicle Wiring # 118558.
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  • Troubleshooting A Non-Working Trailer Wire Harness On A 2012 Honda Pilot EX-L
    Hey Matt, If you're referring to the T-One Vehicle Wiring Harness for Factory Tow Package # 118558 then you shouldn't have any leftover fuses or relays. The relays need to be installed on the wire harness and the 30 amp FMX/JCASE fuse needs to be installed in the secondary engine compartment fuse box in fuse port 3 (trailer main). Without the fuses and relays installed the trailer connector will have no power. What wire harness did you purchase?
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  • Troubleshooting Tow Ready Trailer Wiring Harness # 118558 on 2012 Honda Pilot
    As a first step, you will want to use a circuit tester like part # PTW2993 to test the pins on the 4-pole connector as each function is activated. The 4 pole has 3 sockets and one pin. The socket fed by the green wire is right turn/brake, the yellow wire feeds the socket for left turn/brake and the socket fed by the brown wire is the running lights. If you are not getting the correct signal on the correct sockets, you will want to carefully review the install procedure as outlined in the...
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  • Parts Needed to Install Brake Controller In a 2015 Honda Pilot EXL 4WD
    For installation of the P2 in a tow-package-equipped Pilot you will use a quick-connect wiring adapter, part # 3070-P, to connect the P2 to the under-dash port on the Pilot. If you do not have the tow package which would include a 7-way at the rear of your vehicle you would need to go a different route. You will need to start with a 4-way (if you do not have one). For that you would want the # 118558. From there you would need to convert the 4-way to a 7-way so that you can install...
    view full answer...
  • Recommended Trailer Connector for 2014 Honda Pilot
    To install a 7-way trailer connector on your 2014 Pilot, you'll need part # 118265. You won't need a bracket, as there's an area along side the hitch that can be opened up with a 2 inch hole saw. If you'd rather not do that, you can use a mounting bracket like # PK12711U can be used. The 7-way would plug into the connector you found under the vehicle, you'll need to remove the protective cap before you can plug the 7-way into the connector. The rest of the procedure is explained in the...
    view full answer...
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