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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118571
Retail:$127.17
Our Price: $79.80
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Custom Fit Vehicle Wiring

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Tekonsha Trailer Hitch Wiring - 118571
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118571 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (38)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118571

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

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily
    • Locate connection points behind tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to the battery to avoid overloading vehicle's electrical system
  • Constructed of 16-gauge bonded wire
  • 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 wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.


Tail Light T Connector Diagram

Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.


Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area. It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole 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 two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-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.



118571 Tow Ready T-One Vehicle Wiring Harness

Installation Details 118571 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118571

Average Customer Rating:  4.4 out of 5 stars   (38 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.

by:
Hyundai Santa Fe

I didn't know if my Santa Fe Sport had a trailer package (it was an Enterprise rental that I purchased). During installation of the wire package I found two capped wire connections. A hint on the order may have clued me what to look for. I suspect that if I would have called you you would have been able to advise me. So, IF there was an error I didn't do my part to help!




by:

Everything went together as stated . The videos are terrific. I would recommend to anyone needing a trailer hookup..... Very easy




by:

My trailer hitch arrive within 3 days. It was easy to install. Customer service personnel were courteous and helpful.


Comments
Trailer Hitch is doing well. I have not had any problems. I pull a 5x8 trailer.
Thomas j - 04/25/2014


by:

Straight forward installation




by:

Instillation as advertised. Best with two people. Have towed a few times with no problems.




by:

Great product. excellent customer service. Very good videos to help install. I strongly recommend etrailer.com




by:
2017 Hyundai Santa Fe

Trailer Hitch was no problem went in without a hitch. Punny.
The wiring harness is another story. Need a little bit more wire for the connectors to mount easily, had to pull slightly to get connected to the light assembly.
Tested the lights ( running, right and left turn signal) all worked , but the brake lights never come on when depressing the brake pedal. All of this was tested with the tester.
in the Curt harness the completion is the Tech testing the lights. In the one you substituted (Tec....) kit there is no test performed. Has anyone checked to see if the harness is compatable to the tester or vice versa. I have disconnect the lights cover connecters twice now and everything is the same ,no brake lights.
on the curt kit install the running lights are a single light indication. like the turn signal. the brake indication is all lights lite , and the turn signal glow stronger and blink.
My indication is no running lights on turn signal work OK. running lites on all led's lite. Press brake pedal and no change in lights on tester. turn signal work the same as above. I am completely lost ? Is it the wire harness, the tester, there is a reason that the curt Tech tested in the video but, the one in the other brand did not!!!! ?
also is the end of the trailer hitch supposed to extend out from my bumper by 3.X inches . if so it doesn't . it is back under the bumper by about that much. See beginning of Curt hitch installation , where Tech is discussing the hitch. Maybe the 2017 Hyundai Santa Fe Sport changed in 2017 and you need to check your products. Not pleased with the installation or wire harness.


Comments
Joseph, Thank you for your review on 118571. When testing a 4 way with the circuit tester curt I26 your brake light is combined with the left and right turn signals because it is a combined wiring system. As long as these two signals light up your brake light should be working. If all the LEDS are lighting up then you may need to make sure your 4 way is properly grounded. The white wire needs to be grounded on a clean bare metal surface. I have attached a link for troubleshooting a 4 and 5-way wiring setup. Also, the curt hitch for the Santa Fe extends 5-1/2 inches from center of hitch pin hole to the outer most edge of your bumper. I have attached a link for troubleshooting a 4 and 5-way wiring setup.
-- Etrailer Expert Heather A - 12/08/2017


by:

I ordered the wrong wiring harness! Found out after pulling driver side rear panel and seeing it’s pre-wired from factory. Got to exchange for correct wiring harness! My bad!




by:

Works great. Had to zip tie the end to the hitch, nowhere else to hang it.




by:
2015 Hyundai Santa Fe

With the help of a mechanic, a lift and all the right tools the hitch went on easily. The wiring harness was a little challenging as connections had to be made directly to each tail light. It required finding existing holes to run the wiring harness which required pulling the back panels loose and removing the storage area compartments. This is where the mechanic came in handy as he knew what to pull to pop things loose. I am very pleased with the communication with the eTrailer staff in making sure I had the correct parts needed to install my hitch.




by:
2015 Hyundai Santa Fe

The wire connecting the two rear taillight connectors is not long enough. Needs to be at least another 12 inches. It was very difficult to get the taillights back into their assemblies due to the huge plastic pieces that due to the small amount of wire, I could not get into the proper place.




by:
2013 Hyundai Santa Fe

The hitch and wiring harness arrived quickly and in excellent condition.
The hitch installed easily and quickly. The wiring harness took longer to install on my new Santa Fe Sport than expected but was not difficult. The online videos were a great help as the instructions that came in the package are hard to follow. Excellent service and a great product. Great pricing also.




by:
2018 Hyundai Santa Fe

Instructions for installation were crap. Inside rear panels had to come off to install the wiring into the rear of the tail light. Instructions made no mention of inside panel removal. 2018 Santa Fe. Instructions were from outer space no good. Plug and play wiring worked fine once installed




by:
2013 Hyundai Santa Fe

I have 2 issues with this wiring harness:
1)
the ground cable was 6" too short, Therefore, I had to splice a 6" lead to the ground cable.
2) the cable leading from the left taillight to the right taillight needs to be 2" longer to allow for for a more relaxed run.




by:
2013 Hyundai Santa Fe

Instructions were great, but the cables give you 0 slack! The driver side wireing in particular had zero slack and was very difficult to install, in fact it was so tight that the white ground cable broke and had to get extended. If there were several more inches of wireing, the installation whould have gone a lot more smoothly. Fortunatley i know how to do simple wireing and was able to finish the install.

I have a 2013 Hyundai Santa Fe Sport




by:

I haven't installed my trailer hitch yet, but the service from Seth was excellent.
I received my order in only two days, and it is right before Christmas.
I ordered a curt trailer hitch and wiring harness. Very quick service.




by:

I would probably give a four star I ended up not using it cause I found the out i actually had trailer package and brought a different one from you guy so I don't know how well it would of turn out but I didn't like the complicate installation. But overall you guy do sell good and great product that are usually hard to find in mine town, I do plan to keep buying mine outdoor equipment from you guy since you guy usually have sale all the time which that is great deal and make me want to keep coming back.
Keep up the good work!




by:
2017 Hyundai Santa Fe

Purchases were delivered on time without damage. Pricing was no contest. etrailer's pricing was Significantly lower than all competitors. I will order from etrailer again.
Customer service was super!




by:
2013 Hyundai Santa Fe

I bought the Curt custom hitch receiver Class III and T-one wiring harness for my 2013 Hyundai Santa Fe. Great customer service, they had my order delivered in 2-3 days. Easy instillation and looks great.
Thanks etrailer!




by:

Great kit - fits properly and works.




by:
2013 Hyundai Santa Fe

Installed Curt C13134 Class III hitch & C56151 wiring harness on
2013 Santa Fe Sport. Super easy install! Very happy with product & service.




by:
2014 Hyundai Santa Fe

Worked fine. I had originally installed another brand that kept blowing the fuse and shorting out other lights. This one has worked well for about a year.




by:
2013 Hyundai Santa Fe

Wiring from taillights a little short, had to lengthen them. Connectors all fit like factory.




by:

Not real happy, the proiduct did not fit properly. The wiring over to the passenger tail light was about a foot too short. We had to splice in our own wiring to make it reach tail light.




by:
2016 Hyundai Santa Fe


Comments
Great product and easy install.
Emmitt - 07/17/2022

25
38
Show More Reviews

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

  • Installing T-One Harness # 118501 on 2013 Hyundai Tucson
    The instructions included with the # 118501 wiring harness for your 2013 Tucson are a bit on the vague side. The procedure is different from the Santa Fe harness you mentioned. The first step in the install involves removing the tail light assemblies (as if you were changing a burned out taillight bulb). Disconnect the manufacturers wiring harness from the rear of the assemblies. You will then need to remove the spare tire cover (cargo area floor) and threshold. Then, locate and remove...
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  • What is the Fuse Rating and Power Wire Gauge Used for Trailer Wiring Harness # 118571
    The Tow Ready wiring harness # 118571 is rated for 7.5 amps for brake lights and turn signals and 7.5 amps total for running lights. The fuse that goes on the power wire connection to the battery is a 10 amp fuse. The wire gauge of the long 12 volt power wire included with the kit is 12 gauge. I have included a link to the installation instructions and a link to a video showing a typical installation for you.
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  • Trailer Wiring Harness Recommendation for 2013 Hyundai Santa Fe Sport
    For your 2013 Hyundai Santa Fe Sport the correct trailer wiring harness is the Tekonsh # 118571 which is a confirmed fit. I attached a link down below to a video that shows this harness installed in a similar 2013 Santa Fe Sport as your as well.
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  • Recommended Trailer Wiring Harness for 2017 Hyundai Santa Fe Sport 2.0T Without Factory Tow Package
    For your 2017 Hyundai Santa Fe Sport, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118571 is my recommendation for your trailer wiring. This is designed to work with vehicles without the tow package and will install to your factory wiring harness behind each of your tail lights. It will then draw power directly from the vehicle battery. We do have an installation video to assist and I've also attached an article for help routing that power wire to your battery.
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  • Trailer Wiring Recommendation for 2017 Hyundai Santa Fe Sport
    For a 4-way trailer wiring harness that is a confirmed fit for your 2017 Hyundai Santa Fe Sport the T-One kit part # 118571 is a confirmed fit and would work well.
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  • Where Does Trailer Wiring Harness # 118571 Install on a 2013 Hyundai Santa Fe
    Provided that your 2013 Hyundai Santa Fe is a Sport model then you can use harness # 118571. This harness plugs in line with the vehicle tail light wiring so the connection points are located behind each tail light. I have included a link to the installation instructions for you to view.
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  • Install Video for Tekonsha Trailer Wiring Harness on Hyundai Santa Fe Sport
    I attached an install video link to this page that shows the Tekonsha trailer wiring harness part # 118571 installed on a 2017 Hyundai Santa Fe Sport for you to check out.
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  • Trailer Wiring for a 2013 Hyundai Santa Fe with Factory Tow Package
    If your 2013 Hyundai Santa Fe has the factory tow package then all you will need is a harness that plugs into the vehicle trailer wiring ports, # 118269. The factory connection points are under the vehicle along the frame rail in the back. I have included a link to the installation instructions for you.
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  • Trailer Wiring Harness Recommendation for 2017 Hyundai Santa Fe without Trailer Hitch
    It's almost guaranteed that if you don't have the trailer hitch installed on your 2017 Hyundai Santa Fe that you don't have the factory towing package. That would mean for trailer wiring you'd need the part # 118571. If you had the towing package the kit you'd need instead is the part # 118269. You'd have to remove the panel you see pointed out in the attached picture under the car to determine if the correct wiring is present. You wouldn't be able to see that without removing the panel.
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  • Will the T-One Harness 118269 Fit a 2017 Hyundai Santa Fe Without Tow Package
    If your 2017 Hyundai Santa Fe Unlimited Sport did not come with the factory tow package then it would either not have the tow package port or the circuits would not be active. Therefore, you will need to use the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118571 which plugs in behind the tail lights instead of the T-One Vehicle Wiring Harness for Factory Tow Package part # 118269 which plugs into a tow port on a model with the factory tow package. I have attached...
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  • 4-Pole Wiring Harness for 2018 Hyundai Santa Fe Sport 2.0 Turbo AWD
    If you can confirm with your dealership that your 2018 Hyundai Santa Fe Sport 2.0 Turbo AWD DOES have the factory tow package then you will use Tekonsha 4-pole harness kit # 118269. But if you don't have it, or if you just don't even want to bother to find out, you can still always use the kit for the version without the tow package since it will still fit and work fine. Tekonsha 4-pole Kit # 118571 will work on either version but its installation will be a little more involved than...
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  • Replacement Trailer Wiring Harness Recommendation for a 2014 Hyundai Santa Fe
    Yes, having all the pins of a trailer wiring harness having voltage when a vehicle is off would indicate that the box of the harness has shorted out and needs to be replaced. We don't have the best luck with the Curt harnesses so I would recommend the Tow Ready harness part # 118571 as a replacement and then to go over your trailer's wiring looking for any shorts and fix as necessary.
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  • Troubleshooting Hyper Flash After Trailer Wiring Install on a 2013 Hyundai Santa Fe
    I checked your order notes and it looks like you have the Curt trailer wiring harness part # C56184 on your 2013 Hyundai Santa Fe. Sometimes if the Curt wiring harnesses converter boxes don't get secured well enough to where they are mounted they can end up shorting out from banging around in the vehicle. This isn't a super common problem with Curt harnesses, but we have found that the double-sided tape of the box comes loose pretty easily and can cause movement which can damage the internals. We...
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  • Recommended Tow Hitch and Trailer Wiring for a 2018 Hyundai Santa Fe Sport Without Tow Package
    For your 2018 Hyundai Santa Fe Sport, I recommend using the Curt Trailer Hitch Receiver part # C13152 because it has the highest weight capacity and is the most durable option we have for you due to the superior powder coating process. It is also made in the USA. This trailer hitch is a direct bolt-on fit for your Santa Fe Sport. I have attached an install photo for you as well. For a tallier wiring harness, I recommend the T-One Vehicle Wiring Harness part # 118571 because we have found...
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  • Does the Spare Tire have to be Removed On a 2013 Hyundai Santa Fe Sport to Install a Trailer Hitch
    The spare tire will need to be lowered temporarily to install the Curt trailer hitch # C13153 but it will fit with the hitch installed provided that the spare is the factory size. You may have to angle the tire in/out to get it to fit or lower properly after the hitch is installed. I have linked the video in question as well as the instructions. To complete your towing set up I recommend etrailer ball mount kit # 989900. It comes with 2 balls, to ball mounts, a hitch pin with clip, and...
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  • Can Curt Trailer Hitch 13152 Be Installed on 2013 Hyundai Santa Fe with 18 or 19 Inch Spare Tire
    I spoke with my contact at Curt about trailer hitch # C13152 for the 2013 Hyundai Santa Fe Sport. He stated that they have not heard of any fit issues with an 18 or 19 inch spare tire. The spare tire will need to be lowered temporarily to install the Curt trailer hitch # C13152. You may have to angle the tire in/out to get it to fit or lower properly after the hitch is installed. I have linked a video showing a typical installation as well as the instructions. To complete your towing set...
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  • Trailer WIring Harness for a 2014 Hyundai Santa Fe
    Yes, we do have trailer wiring options for your 2014 Hyundai Santa Fe. If you have a GLS, Limited, or Sport model with the factory tow package use wiring harness # 118269. For a Sport without factory tow package use # 118571. For a GLS or Limited without factory tow package use # C56184.
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  • Parts Needed to Tow Boat Trailer with 2016 Hyundai Santa Fe Sport
    First thing you need to tow a trailer with your 2016 Hyundai Santa Fe Sport is a trailer hitch. Which for that I recommend the etrailer.com hitch part # e98841 which is a 2 inch hitch with plenty of capacity and installs very easily. See install video attached. For trailer wiring you'd then want the Teksonsha kit part # 118571 which also installs easily and comes with a very reliable converter box. Since you wanted to do some towing you might be interested in etrailer ball mount kit...
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  • Trailer Hitch and Wiring for a 2016 Hyundai Santa Fe Sport
    For your 2016 Hyundai Santa Fe Sport the most popular hitch option is # C13152. This is a Class III hitch with a 2 inch receiver rated for 6,000 pounds gross trailer weight. I have included a link to a video that shows an example installation for you. For a trailer wiring harness you can use # 118571 to add a 4-Way flat connector at the back of your Santa Fe. I also recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one...
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  • Trailer Wiring Harness Options for a 2013 Hyundai Santa Fe
    On a 2013 Hyundai Santa Fe that came with the factory tow package the connectors for a wiring harness get power via the vehicle electrical system powered through the fuse box. But models that did not come with the factory tow package might have the factory connectors at the back but they may not be active. If your Santa Fe came with the factory tow package then you can use # 118269. For a Sport model without factory tow package use # 118571 and for a GLS or Limited model without factory...
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  • Draw Tite Trailer Hitch for 2016 Hyundai Santa Fe Sport
    For your 2016 Hyundai Santa Fe you will need to upgrade your trailer hitch to the part # 75776 as the 75772 is not a confirmed fit for the 2016 models. I attached an install video for you to check out as well. For trailer wiring you would want the part # 118571 which is a confirmed fit. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch...
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  • Trailer Hitch Recommendation for 2017 Hyundai Santa Fe Sport
    If the plan is to do any towing and there is a 2 inch hitch available that's the way to go. So for your 2017 Hyundai Santa Fe Sport the Curt hitch part # C13152 would be a great option and the best recommendation we can make. For trailer wiring you'd then want the part # 118571. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop....
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  • Parts Needed to Install Trailer Brake Controller on a 2013 Hyundai Santa Fe Turbo AWD w/Tow Package
    You will start by installing the trailer wiring harness # 118571 (fits Sport models) that you have referenced. I have linked the instructions for you. To add a brake controller you will need to use 4 and 7-Way installation kit # ETBC7. This will provide the 7-Way and the wiring needed to install the P2, # 90885. I have included some links to instructions and a video that will help you with this installation.
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  • Trailer Hitch Recommendation for a 2013 Hyundai Santa Fe Limited Long Wheelbase
    For the long wheelbase 2013 Hyundai Santa Fe you can use trailer hitch # C13153 that you have referenced. I have included a link to the installation instructions for you. If you plan on doing some towing I recommend the etrailer ball mount kit # 989900. It includes 2 ball mounts, 2 balls, a hitch pin with clip, and a storage bag. For trailer wiring for a non-Sport without the factory tow package use # 118571. Or for a non-Sport model with the factory tow package use # 118269.
    view full answer...


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