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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Tekonsha

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

Part Number: TK47FR
In Stock
$98.26
Retail:$135.61
You Save: 28%
Custom Fit Vehicle Wiring

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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. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number TK47FR or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (26)
  • Q & A (0)
  • Videos (1)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - TK47FR

  • 4 Flat
  • No Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Tekonsha
  • Plug and Lead
  • Converter
  • Hidden

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 in rear cargo area
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes ModuLite power module that connects directly to 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 lights: 5 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 in the rear cargo area. You will have to remove the plastic threshold cover, side panels, cargo trays, and interior trim panels to access this harness.


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 your rear 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 Power Module

A ModuLite power module is built into this T-One connector. 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.



118743 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details TK47FR Installation instructions

This Product Fits The Following Vehicles



California residents: click here


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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - TK47FR

Ellen: Hey everyone. I'm Ellen here at etrailer.com and we're going to be taking a quick look at the Tekonsha T1 vehicle wiring harness. This allows you to have the stop turn and tail light functions transferred from your vehicle into your trailer wiring or into your trailer lighting or any other kind of accessory that might use that four-pole connection.The nice thing about this kit is that we don't have to worry about cutting or splicing into our vehicle's wiring. You're not making any modifications there. You're just going to be using the plugs that come off of your taillights to plug right in line with those to get those signals. So no worries about making any changes to the electrical system of your vehicle.

It doesn't change the function of your vehicle normally. Just gives you that four pole at the back where you need it.So let's talk about what comes in the kit and roughly how it's going to be installed on your vehicle because there's a custom fit for the 2015 through the 2019 BMW X5. That's for all the models. The thing that's really nice about the Tekonsha wiring is that is a very reliable system. I've very rarely, if ever, see these comeback for any kind of issues.

They just have a really nice well-made box. So shouldn't have any issues at all with it.I think the reason for that is probably because of this potting material in the connection here or in the ModuLite box. This is where all the circuitry is or kind of the brains of the operation is and that potting material keeps out any kind of water or debris. It also helps it to be vibration and impact resistant. So as it's going down the road, shouldn't have any issues.

If it does happen to come free, where it's been mounted up to, which can happen, it shouldn't have any issues with affecting how it works. It just might be making some sounds. So just from banging around in the back of your vehicle.So you want to make sure that you mount that in a nice spot using the included double-sided foam tape. To adhere that, clean off a nice area with some alcohol and a clean cloth. Should give you a good stick to that, once you hold it in place for a few seconds.Coming off of that box, we'll have our connections to go in line with our vehicles wiring.

So you need to get access to the back of your taillights and plug those guys in line. This is where it gets the name the T1 harness. So this will be for the passenger side, the green wire, and on the driver's side, you'll get the yellow and brown. Coming off of there as well is our little black wire. That's going to go to our bulk wire and then go on to the positive side of our battery.Put the fuse holder in between that connection to the positive terminal on the battery. Comes with a 15 amp fuse so it is fuse protected. You don't have to worry about any issues arising there. The box also protects your vehicle from any kind of transfer of any electrical issues from the trailer to the vehicle and vice versa.You'll get two butt connectors, a ring terminal, and a self-tapping screw. That's going to be most likely for our ground connection, which will be the last wire to worry about here.You usually want to just find a good chassis ground for this, or if you can, find a factory ground. You can always attach it to that as well. That's always kind of nice when you can do that. And if you don't end up needing to use that screw, you can always use that to attach the box.Get a handful of zip ties to make sure that all the wiring is cinched up out of the way. If you have to run this outside the vehicle, you want to make sure that you use a lot of these to keep that wire tucked up and out of the way, secure it to several anchor points along its path and keep it away from anything hot, like the exhaust and anything moving, like the suspension.Last thing that we're going to worry about is our four-pole. This is what we're really after. So it has an occluded cap that's molded onto the base there to keep that protected. Normally, you can just run this outside the vehicle through the hatch. There should be some weather stripping, that kind of foam material or a kind of soft material to give that watertight seal. You can run it through there. It's flat enough that it can go through that without having any issues, but it's still going to seal up nice and tight so you don't have to worry about anything getting into your vehicle like water.Some people don't like the look of that. It looks a little messy. So they would prefer to have a permanent mountain next to the hitch. Definitely a possibility or definitely something you can do. Usually it just takes a little bit more work to do that. So you'll need to find a ground to go outside the vehicle, pick up a couple of brackets, including a four-pole bracket to attach it to your hitch so that you can have that sitting there next to it and then the wiring is kind of tucked up out of the way. You don't have to go through all that though. It works just fine coming out of the hatch, but that's just an option. And if you want to pick up those brackets, you can find those right here at etrailer.com.But that's pretty much all there is to it for our look at the Tekonsha T1 vehicle wiring harness. I hope this video has been helpful in deciding if this is the right fit for you. Again, I'm Ellen here at etrailer.com. Thanks for watching.

Customer Satisfaction Score:

Ratings & Reviews

4.9

26 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:

Easy to install, plug and play connectors at tail lights, no cutting/splicing of ANY factory wiring is a huge plus. Would be better if it was designed to install on the right (passenger) side rear, as there is a grommet to allow the trailer connector to pass through to the outside (passenger side behind the bumper). I wound up extending the left side tail light connector to allow right side module installation.

Ryan profile picture

Ryan

8/11/2022

A year later and still satisfied. No issues to report.



by:

I installed this on a 2017 BMWx5d. The video provided be etrailer was excellent for preparation. The wiring kit installed easily with no wire splicin and has worked flawlessly since installing a year ago

Jt profile picture

Jt

10/7/2022

This harness has been great for my 2017 BMW x5 Diesel. I trailer my boat twice a month to the boat ramp and the rest of the time my wife drives the SUV. The harness conveniently hides in the left storage compartment when not in use.



by:
2014 BMW X5

The harness worked great, I had it installed in about 20 min. Just an FYI the harness fits the 2014 BMW X5 35D as well as the other years listed on the Etrailer website.



by:
2017 BMW X5

Installed and mounted easily in 2017 BMW X5 35D. Using it for lights on a cargo carrier for occasional use.



by:
2017 BMW X5

I can't believe how easy this was to connect. With the benefit of BMW placing their batteries in the rear, direct wiring to the battery for power a breeze.



by:

Neat and easy installation. Working pe rfectly!



by:
2016 BMW X5

Fits my 2016 X5 nicely. Not having to splice into the factory wiring is a huge plus.



by:

The installation doesn'f get much easier, quick and clean professional look.



by:
2017 BMW X5

LOOKS LIKE PLUG AND PLAY AND GOOD QUALI TY!



by:
2017 BMW X5

The directions for this install were very thorough and easy to follow. It made installation very easy.



by:
2017 BMW X5

Great product. Just plug in and connect to battery. Didn’t have to even read instructions, but did so just in case. Very easy and total worth it. Thanks!



by:

Zero problems with install and works like a champ



by:
2015 BMW X5

The service is excellent. But it need to do a better packaging.



by:
2015 BMW X5

Easy to install, no issues.



by:

Very easy install.



by:

Works great, and not bad to install.



by:
2017 BMW X5



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2018 BMW X5



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2017 BMW X5



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Show More Reviews

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

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    Thank you for all of the details! I recommend going with the etrailer Trailer Hitch Receiver # e84AR for your 2015 BMW X5 with the M Sport Package. This has been confirmed to fit that specific package and I like the matte black finish because it's hidden better and better protected against the elements than the glossy black finish that we find on the other hitch receivers. The max tow weight rating for this hitch is 6,000 lbs but you'll need to double check in your owner's manual how much...
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  • Can T-One Wiring for 2016 BMW X5 Be Used with Stealth Hitches Wiring Kit
    Thanks for reaching out! The T-One Vehicle Wiring Harness # TK47FR is a little more plug and play compared to the wiring that comes with the Towing Kit w/ Ball Mount and Trailer Wiring for Stealth Hitches Hidden Rack Receiver # SH98VR, the wiring kits can't really be swapped out and unfortunately the Stealth Hitches kit has enough parts in it to warrant the need of the whole kit (like the ball mount and safety chain loops). What you can do to mitigate the amount of splicing is get the...
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Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C
Employee John A
Test Fit:
John A

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