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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # TK47FR
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Our Price: $105.12
Custom Fit Vehicle Wiring

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Tekonsha Trailer Hitch Wiring - TK47FR
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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 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.
  • All Info
  • Reviews (17)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - TK47FR

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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.


  • 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


  • Maximum amperage:
    • Stop/turn lights: 5 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


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

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - TK47FR

Average Customer Rating:  4.9 out of 5 stars   (17 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.


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.

A year later and still satisfied. No issues to report.
Ryan - 08/11/2022

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!


Zero problems with install and works like a champ


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

2016 BMW X5

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

2015 BMW X5

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

2017 BMW X5



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


Works great, and not bad to install.




2017 BMW X5

2018 BMW X5

2017 BMW X5

by: 03/25/2021



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

  • Trailer Wiring Harness for 2017 BMW X5
    For your 2017 BMW X5 we do have trailer lighting harnesses like the Tekonsha part # TK47FR which plugs into the vehicle taillight harnesses for an easy install.
    view full answer...
  • Is Rear Fascia Trimming Needed to Install EcoHitch Trailer Hitch EH44FR on 2017 BMW X5
    I took a look for you and can confirm that there is no trimming of any fascia required to install the EcoHitch you asked about that fits your 2017 BMW X5: - EcoHitch Stealth Trailer Hitch Receiver # EH44FR This is a really cool choice for a hitch on your X5 because the hitch tube is completely concealed, and you can remove the receiver portion of the hitch if you aren't using it so your BMW will maintain its aesthetic. The only other thing I wanted to mention, in case you were going...
    view full answer...
  • What Hitch Allows You to Keep the Use of the Factory Impact Structure on a 2018 BMW X5
    The Draw-Tite Max-Frame Trailer Hitch Receiver # 75600 does retain use of the factory impact structure bar, you would remove the impact bar during installation but then the impact bar would be put back in place. The Curt Trailer Hitch Receiver # 13077 does take the place of the impact structure, the hitch would then provide the support and safety the impact bar once did. They both have 2" receiver openings, 600 pound tongue weight and 6000 pounds for trailer weight. Either hitch will work...
    view full answer...
  • Are the Replacement Rivets Included With the Draw-Tite Hitch Compatible with 2015 BMW X5
    According to my contact at Draw-Tite, the plastic rivets included with the Draw-Tite Max-Frame Trailer Hitch Receiver # 75600 will fit your 2015 BMW X5. I am also attaching an installation video for this hitch on a 2015 X5 where they use the rivets to reattach the wheel well molding. If you plan on doing some towing, I recommend the Tekonsha T-One Vehicle Wiring Harness # TK47FR for wiring. This custom wiring harness plugs directly into existing wiring for quick and easy installation....
    view full answer...
  • Does The Aux Port Need To Get Connected For Reverse Lights When Upgrading From A 4 Flat
    The black box, or converter, on the Tekonsha T-One Vehicle Wiring Harness # TK47FR will actually combine/delete certain functions for a 4 Flat harness as most smaller trailers will not have reverse lights. With that being said, if you wanted to get the reverse lights working, you will need to attach the auxiliary port of the # C57674 to the reverse lights.
    view full answer...
  • Curt VS Draw-Tite Trailer Hitch Receiver Fitment For a 2015 BMW X5 xDrive 35d M Sports Model
    The Draw-Tite Max-Frame Trailer Hitch Receiver # 75600 will not fit the M model of your 2015 BMW X5 due to the exhaust differences between the models. The M model moves the exhaust inward and also adds an additional exhaust tip on each side. Due to the lower cross tube on the Draw-Tite it will not fit properly with the exhaust. Since the Curt Trailer Hitch Receiver # 13077 positions the cross tube higher it will fit without the exhaust issue. I recommend installing the T-One Vehicle...
    view full answer...
  • Will Powered Taillight Converter Harness Draw Power When Vehicle is Shut Off
    Although the Tekonsha 118743 trailer wiring harness which we sell as # TK47FR is connected directly to the battery to provide a reliable secure power connection for the trailer taillights, it won't pull any power from the battery unless the taillights are actually on. If it would make you feel better, you could install a battery isolation solenoid like part # TR118665 inline on the circuit ran to the battery so the feed shuts down when the ignition is off, but it's honestly not necessary. The...
    view full answer...
  • Trailer Hitch Receiver Recommendation For 2017 BMW X5
    The most popular trailer hitch receiver for your 2017 BMW X5, and the one I recommend for you, is from Draw-Tite, and is definitely more cost-effective than other brands: - Draw-Tite Max-Frame Trailer Hitch Receiver # 75600 The hitch is mostly concealed, with only the receiver showing, so it is more economical than the Stealth Hitches Hidden Rack Receiver # SH79VR, for example, which allows you to remove the receiver so nothing is showing when you aren't using it. The Draw-Tite # 75600...
    view full answer...
  • Does the etrailer Trailer Hitch Receiver Fit 2017 BMW X5 With M Performance Package
    The etrailer Trailer Hitch Receiver # e84AR is confirmed to fit your 2017 BMW X5 M. The designation can be confusing sometimes since it is listed as fitting the M and also everything else that is not the M. This Class III hitch has a 2" receiver with a 6,000 lb gross trailer weight and 600 lb max tongue weight. If you plan on doing some towing, I recommend the T-One Vehicle Wiring Harness # TK47FR for your wiring needs. This will provide you with a 4-way to power your trailer's signal...
    view full answer...
  • Trailer Hitch Recommendation for 2015 BMW X5 with M Sport Package
    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...
    view full answer...
  • Correct EcoHitch Trailer Hitch Receiver For 2018 BMW X5
    It does matter which EcoHitch trailer hitch receiver you get for your 2018 BMW X5, as there are fit differences, like you mentioned, as the hitches are designed slightly differently. The # EH44FR is a fit for X5's that have back-up sensors, so the correct fit for your 2018 BMW X5 that does not have back-up sensors is the following: - EcoHitch Stealth Trailer Hitch Receiver # 306-X7265 They otherwise do have the same 5,000 lb towing and 750 lb tongue weight capacities, and the 2 inch receiver...
    view full answer...
  • Trailer Hitch for the 2018 BMW X5 with Back Up Sensors
    The EcoHitch Stealth Trailer Hitch Receiver that is designed to fit the 2018 BMW X5 is # EH44FR. This hitch very similar to # 306-X7265 accept it is designed to fit the model with the rear parking sensors. If you need trailer wiring for your vehicle, I recommend # TK47FR.
    view full answer...
  • Hidden Trailer Hitch Receiver Fit For 2016 BMW X5 40e Hybrid
    We do have a trailer hitch receiver fit for your 2016 BMW X5 40e hybrid, but I checked with Stealth Hitches directly, and they do not have a fit for your specific year, make and model. What you can use instead is a hitch from EcoHitch, that does fit your '15 X5 40e, and also has a removable receiver just like the Stealth Hitches option. There are two different EcoHitch options, with the right one depending on if you have backup sensors or not on your '16 X5: - WITH Back-Up Sensors: EcoHitch...
    view full answer...
  • Trailer Hitch Recommendation for 2018 BMW X5 M Sport
    For your 2018 BMW X5 M-Sport we have the Curt Class III part # 13077 as a confirmed fit. This is a standard 2 inch trailer hitch is mostly hidden but does not have a removable portion like the Stealth # SH56VR. For trailer wiring you'd want the part # TK47FR for the easiest install and most reliable converter. 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...
    view full answer...
  • Recommended Hitch and Wiring Harnesses for a 2015 BMW X5
    I would be happy to help you set up your 2015 BMW X5 for towing. You're going to need a hitch, a couple wiring harnesses, brake controller, and a ball mount with a ball. For your hitch I recommend the EcoHitch Stealth Trailer Hitch Receiver item # EH44FR. This hitch is custom fit and bolts directly to your BMW with included hardware. The best feature about this hitch is that the receiver portion is completely removable. When you're not towing your trailer you can unbolt the receiver and...
    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...
    view full answer...
  • Recommended Parts to Add Brake Controller to 2017 BMW X5 with Aftermarket 4-Way Connector
    The Tekonsha Plug-In Wiring Adapter # TK29FR is what you'd use if your 2017 BMW X5 has the factory 7-Way connector at the back. Since you're using the T-One Vehicle Wiring Harness # TK47FR that tees in behind the tail lights on your vehicle you need to use the Universal Wiring Kit # ETBC7 instead. This kit comes with all of the wiring and connections you need for a fully-functioning 7-way as well as what you need to get a brake controller up and running. Please note that it might be difficult...
    view full answer...
  • Recommended Hitch and Towing Kit for 2017 BMW X5
    If you're trying to decide between the hitches available for your 2017 BMW X5, I attached a link of our selection with a "Best" video at the top of the page. It has a great overview and comparison of the top 3 hitches: Curt, Draw-Tite, and Ecohitch. The Draw-Tite Hitch # 75600 is great in terms of weight capacity with 600 lbs tongue weight and 6,000 lbs towing weight capacity. It does involve some fascia trimming with a utility knife. I attached a picture from the instructions showing...
    view full answer...
    Image 1 for
  • Trailer Hitch, Roof Rack, Cargo Box, & Ski Rack For 2017 BMW X5
    We can get you a list of all the parts for your 2017 BMW X5 so you can hit the road; here is the list of the exact parts you will need to tow your trailer while hauling gear on a roof rack: - Draw-Tite Max-Frame Trailer Hitch Receiver # 75600 - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # TK47FR - etrailer Ball Mount Kit for 2" Hitches # 989900 - Rhino-Rack Vortex Aero Crossbars # RRVA137B-2 - Rhino-Rack SRB Legs for Vortex Aero Crossbars - Flush Factory Side Rails...
    view full answer...
  • Recommended Concealed Trailer Hitch for 2018 BMW M Sport
    Assuming that your vehicle has the M Sport trim package but isn't the M or the M performance model, both the EcoHitch # EH44FR for vehicles with a back up sensor or # 306-X7265 for vehicles without the back up sensor and the Stealth # SH85VR would work great for your X5. If the 5000 lb capacity of the EcoHitch would accomplish your needs, there's really no reason not to go with the EcoHitch. Both EcoHitch and Stealth have great reputations for their excellent quality, and as you said,...
    view full answer...
  • Hitch, Trailer Connector and Brake Controller Recommended for 2017 BMW X5
    For a hitch, I'd recommend the Curt Class III, part # 13077 as the etrailer brand # e98840 you'd looked at isn't a fit. For a ball mount, use # 2753 and # 19260 for a 1-7/8 inch or # 63845 for a 2 inch trailer ball. For the trailer connector and brake controller, I'd recommend using a wireless option like the Curt Echo, part # C51180. The Echo will communicate wirelessly with your smart phone, allowing you to control trailer braking from the vehicle cab without needing to drill into your...
    view full answer...
  • Mounting Options For 7-Way Trailer Connector On a 2015 BMW X5 35D M Sport
    I recommend the Curt Easy Mount Bracket # C58000 on the end of the Curt Trailer Hitch Receiver # 13077. This is going to be a solid mount and will handle the weight of the connector and the 7-way harness when they are connected. Using a Mighty Cord Universal 7-Way Mounting Bracket # A10-9394VP attached to the bodywork you are now relying on plastic to hold all that weight. This bracket would be great if it was attaching to steel but I would not feel comfortable with it attaching to only...
    view full answer...
  • Recommended Trailer Hitch and Wiring Harness for 2017 BMW X5
    We do have wiring harnesses for the 2017 BMW X5 diesel to go with a hitch like the Curt # 13077. If you wanted everything in a complete package that includes the hitch, wiring, ball mount for towing and a receiver that can be used to carry hitch mounted accessories, the Stealth Hitches # SH85VR is a great choice and one of our most popular options for luxury vehicles like your 2017 BMW X5. This kit also comes with 7 way wiring. If you want to piece a system together, in order add a functioning...
    view full answer...
  • Which Concealed Trailer Hitch for 2018 BMW X5
    Both hitches fit certain models of the 2018 BMW X5. The EcoHitch # EH44FR will fit 2018 BMW X5 models, with the exception of M performance models (will fit M sport model) that have a rear back up sensor. The EcoHitch # 306-X7265 fits 2018 X5 models without the backup sensors, except M performance models. The Stealth Hitch # SH79VR hitch you'd looked at fits all models except the M performance. For the M performance, you'd use # SH56VR. Both hitch include the receiver that's meant to...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C

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