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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
THIS ITEM IS NOT A FIT FOR
2017 Ford Escape
Tekonsha

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

Part Number: TK54ZR
In Stock
$102.32
Retail:$152.24
You Save: $49.92
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2017 Ford Escape

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In Use/Installed

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 TK54ZR 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 (9)
  • Q & A (0)
  • Videos (2)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - TK54ZR

  • 4 Flat
  • No Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Tekonsha
  • Plug and Lead
  • Powered 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 privacy screen, side panels, cargo floor covering, 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.



118879 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details TK54ZR Installation instructions

This Product Fits The Following Vehicles

  • 2022 - 2026 BMW X3 excluding X3 M
  • 2022 - 2026 BMW X3 M40i models
  • 2022 - 2026 BMW X3 X3 M
  • 2022 - 2026 BMW X3 xDrive30i and sDrive30i


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 In-Depth Review of the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector-TK54ZR

Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at this T one vehicle wiring harness with the four-way flat trailer connector. Now this is a custom fit part. It is designed to fit the 2022 and newer BMW X3 models. And on a custom fit part like this, I do like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this will work for your application. Now this kit here will provide this four-way flat trailer connector at the back of your vehicle.

The power of your trailer signal lights. This connector is compatible with the five poles, six pole, and seven pole adapters that we do sell separate on our website. And this kit does connect very quickly and easily. All you have to do is locate your connection points which will be in the rear cargo area. Plug in these T connectors, one on each side, and then ground your white wire right here.

And then just run your power wire to the vehicle's battery. Now it does include this black box here which is a circuit protected tail light converter. And this is to ensure that your vehicle's wiring will match that of your trailer. It is a powered module, connects directly to the battery, and that's to avoid overloading your vehicle's electrical system. Also, if you notice on the four-way, comes with this built-in integrated dust cover.

So when you're not plugged into your trailer, you can actually take this cover, put it over the terminals and it protects them from any elements or from any damage. Few specs on this kit, the maximum amperage on the stop and turn light circuit is five amps per circuit. Tail lights, 7.5 amps. Now I do want to go through and just show you how all these parts connect briefly. It does come with a nice set of instructions.

It'll describe how it all goes together and where your connection points are. But as we mentioned, what you'll do is go to the rear cargo area and you'll find your connectors. These are your two connectors. You'll start with the driver's side and use this one with the yellow wire in it. That's for the driver's side. You'll unplug the connectors on your vehicle, plug this in there, and then you'll go to the passenger side and take this side with the green wire, has a length of green wire, that'll run over to the passenger side. And same way, you'll plug that in just like that. Now the white wire right here it has a length of it with an eyelet on it. You do want to connect that to a good clean ground if there's one nearby. If not, they do include this grounding screw that you can make your own ground. And then this converter box does have a little weight to it so you do want to attach that to an nice flat surface so it doesn't bounce around. They do have a bracket on it with a hole that you can put a screw in there, or they do include a piece of double face tape that'll hold it into place. Once that's all attached, you'll run this four-way out back towards your trailer, and then you'll have one last connection to make. And that's this power wire right here. This'll run to your vehicle's battery. And to do that they give you the extra length of wire to do that. And you don't wanna wanna run it directly to the battery. You wanna run it through this inline fuse holder. So they do give you the connectors. You put a butt connector on this. Connect one under this wire, run your length of wire to your battery. Once you get up to the battery on that end take another butt connector and connect that to the one side of the fuse, inline fuse holder. On the other side you'll take the included eyelet connector, connect it and then this will connect to your battery. Once it's all connected, just pop open the inline fuse holder. Take the included 15 amp fuse, insert it into the fuse holder. And once it's inserted, put your cap back on and now your system's all ready to go. If you notice they do give you some extra cable ties to take up any slack in the wiring. But that should do it for the review on the T one vehicle wiring harness with the four-way flat trailer connector.

Customer Satisfaction Score:

Ratings & Reviews

4.9

9 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:
BMW X3

I haven't used the trailer a lot but the wiring kit worked on my 2022 BMW X3 with a Uhaul trailer.



by:
2022 BMW X3

The Tekonsha T-One wiring harness is excellent. The plug connectors for the lights are a huge benefit to ease installation and reliable operation. The etrailer installation video (by Burt) is very good and much appreciated.



by:

The instructions were adequate. Actually finding the wire connects was a bit challenging. The picture on the instructions was the key, but not the ones in the box. The same instructions are available on their website as a pdf and opening it on my phone allowed much better detail in color and got me pointed in the right direction.



by:

Easy to install, works great

Ian profile picture

Ian

2/9/2025

Works fine, no issues

Kate F. profile picture
Etrailer Expert

Kate F.

2/10/2025

@Ian Glad to hear it! What do you mainly use your wiring for?


by:

It was real easy to install and is very clean looking



by:
2024 BMW X3

Great quality product easy to install



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

  • Trailer Hitch and Wiring Recommendation for 2024 BMW X3
    Hey Dennis, I would be glad to help pick out a hitch for your 2024 BMX X3! All three of those hitches are pretty similar but I like the consistent higher quality of the Curt hitches so I would go with the part # C13387 from them which also happens to have the best price. The handsfree liftgate will still function but you may have to kick to either side of the hitch opening. Then for trailer wiring you'd want the Tekonsha part # TK54ZR which is the easiest to install and has most reliable...
    view full answer...
  • Does Install of Brake Controller on 2023 BMW X3 Require Trip to Dealer
    Hey TJ, we can help you install a brake controller in your 2023 BMW X3 and it won't require any trips to the dealer but you will need to start with a 4-way like the part # TK54ZR if you do not have one already. Then you would need to convert that to a 7-way with the part # ETBC7 so that you can wire in a brake controller like the Redarc Tow Pro Liberty # RED52VR which his my favorite option since it only puts a small knob on the dash of the car. What are you planning on towing?
    view full answer...
  • Does Hands-Free Liftgate For 2024 BMW X3 Work With Draw-Tite Trailer Hitch
    Hi Jason, Good question and I can verify for you that yes, the hands-free liftgate on your 2024 BMW X3 (including the x30i models) will absolutely still work when you install the Draw-Tite hitch: - Draw-Tite Max-Frame Trailer Hitch Receiver # 76226 There are no drawbacks regarding using the liftgate, and the range lost is simply that you have to kick your foot to the side of the 2 inch receiver rather than directly under it. If you take a look at the photo you can see exactly where you...
    view full answer...
  • Recommended Trailer Hitch Receiver and Wiring for 2023 BMW X3 xDrive30i
    For a hitch that fits your 2023 BMW X3 xDrive30i I recommend the etrailer Trailer Hitch Receiver # e46KR. This is a Class III hitch with a 2" receiver and a bolt-on installation. This has a concealed cross tube so only the receiver will be visible at the rear of your vehicle. It also comes with a matte black powder coat finish which gives it an OEM look. For the most reliable wiring you want the Tekonsha T-One Vehicle Wiring Harness # TK54ZR. This plugs into the connection points in your...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Wilson B
Updated by:
Wilson B
Employee Sabrina W
Written by:
Sabrina W
Employee Bruce K
Test Fit:
Bruce K
Employee Evan R
Video by:
Evan R

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