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

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

Item # 118811
lowest price pledge
Retail:$102.04
Our Price: $55.93
You Save: 45%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping
Shipping Weight: 1.58 lbs
Quantity: 
In Stock
Custom Fit Vehicle Wiring 118811 - 4 Flat - Tekonsha
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
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. Call 800-298-1624 to order Tekonsha custom fit vehicle wiring part number 118811 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.
  • All Info
  • Reviews (35)
  • Q & A (22)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118811

  • 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 in rear cargo area
    • 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 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, and cargo trays 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.



118811 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118811 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 - 118811

Average Customer Rating:  4.8 out of 5 stars   (35 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.

- 118811
by:
2018 Volkswagen Tiguan

I bought this for our 2018 Tiguan and it works great. The instructions were well thought out and easy to follow. Included everything I needed in materials to complete the job. I would however recommend running the main power wire through the cabin instead of using zip-ties to the bottom of the car. It provides a cleaner install and there are plenty of vides to follow for this. total time it took was a few hours taking my time with routing it inside.



- 118811
by:
2021 Volkswagen Tiguan

Easy to use website. etrailer customer service answered my questions and responded quickly and accurated with shipping information. Happy customer...



- 118811
by:
Volkswagen

The Tekonsha part works great. I own a VW and "trailer" turn signals hyperflash when car headlights are on. Yet all other light modes work fine. Turn headlights off 100% perfect. It's a VW computer thing. The Curt was worse.



- 118811
by:

Excellent from ordering made simple to shipment and arrival at my home. Packaging was outstanding!



- 118811
by:

Self-installed with help from the videos on the etrailer website. Still working great!



- 118811
by:

plug and play! very simple installation. took no more than 45 min



- 118811
by:

The overall fit was excellent and instructions well detailed. The only issue I had was the vehicle well nuts shifted slightly making it somewhat difficult to initially get the bolts back in. There were access holes in the frame to help realign the nuts.



- 118811
by:

Great! Works as advertised. I installed it myself, fairly easy. Great product.



- 118811
by:

Excellent product, almost all plug n play. Clearly gaining access to the connections and running the primary to the battery are the biggest obstacles. Watch the videos and read the reviews before you buy. If it sounds beyond your skillset it probably is. For me, popping the panels proved easy. I managed to not break anything. All the provided wiring reached where it was supposed to. I followed the advice of another review suggesting that the primary be run thru the vehicle cabin along and under the trim. Then I found an access hole in the engines firewall where other wires passed thru a rubber grommet. I actually uncurled a metal hanger, guided it thru from cabin to engine compartment, connected the provided primary wire and pulled it back thru. My vehicle’s underbody has a full length cover/shield, which without a lift would have been awful to deal with. Again, excellent product.



- 118811
by:
2021 Volkswagen Tiguan

Your company did good. Instructions leave some to be desired.



- 118811
by:

Very easy to install, plug and play. I ran the wire to the battery through the interior of the car and through the firewall. A lot cleaner and pretty simple. There’s a plug in the firewall where the clutch pedal would be, made it easy



- 118811
by: 05/25/2021

Everything worked as suggested on our new vw tuguan.



- 118811
by:

Seems to work as advertised. Seems to be a quality product Install was a bit of a hassle but not too bad. I recommend watching the video for the CURT wiring. Easier to follow than the fuzzy pictures and less than perfect printed instructions that came with the Tekonsha harness.



- 118811
by:

Product shipped quickly, arrived on time and in great shape. Hitch was super easy to install and the etrailer.com instruction videos were clear and helpful. Very satisfied with the purchase and service from etrailer.com



- 118811
by:
2020 Volkswagen Tiguan

Best source for rv accessories, I recommend them to everyone



- 118811
by:
2020 Volkswagen Tiguan

Everything came perfectly packaged and installed relatively easy. I don’t have the equipment at home that they have in the videos on the website.



- 118811
by:

Wiring took about 40 minutes to complete



- 118811
by:
2019 Volkswagen Tiguan

Easy install and great product!



- 118811
by:



- 118811
by:
2018 Volkswagen Tiguan



- 118811
by:



- 118811
by:
2020 Volkswagen Tiguan



- 118811
by:



- 118811
by:
2021 Volkswagen Tiguan



- 118811
by:
2020 Volkswagen Tiguan


25
35
Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • Help Accessing Taillight Housing Connectors for Installing Trailer Wiring 2018 Volkswagen Tiguan
    I attached a picture that shows how the very similar Curt trailer wiring harness part # C56403 installs which has a better set of instructions for accessing the taillight housings than the Tekonsha kit part # 118811.
    view full answer...
    Image 1 for
  • Is Installation of T-Connector Wiring the Same as T-One Wiring for a 2019 Volkswagen Tiguan
    The installation video and instructions for the Curt T-Connector # C56403 and Tekonsha T-One # 118811 are essentially identical. There might be slight differences but you could easily install one brand with instructions from the other brand no problem. You can definitely use the install video from the Curt (linked to this answer page) to install the Tekonsha on your 2019 Volkswagen Tiguan. If you don't already have a trailer hitch then I recommend using the Curt Trailer Hitch Receiver...
    view full answer...
  • Help Locating Connection Points For Trailer Wiring Harness For 2020 Volkswagen Tiguan
    I am happy to assist you in finding the correct tail light connection points for your 2020 Volkswagen Tiguan Tekonsha wiring harness part # 118811. I have attached a snip from the installation instructions of the Curt wiring harness (which installs the same) that explains more thoroughly how to find the connection points. They are located in the rear cargo area of the Tiguan underneath the panel pointed out in the attached photo. There is some trim panels that need to be removed first....
    view full answer...
    Image 1 for Image 2 for
  • Where to Run Trailer Wiring Harness Power Wire on a 2018 Volkswagen Tiguan
    There is no one specific way to route a power wire from a trailer wiring harness such as # 118811 to the battery on a 2018 Volkswagen Tiguan. It all depends on how you want to route the wire. I have written a help article on this subject with tips on routing the power wire which I have linked for you.
    view full answer...
  • Factory WIring Compatible Trailer Wiring Harness for 2020 VW Tiguan
    The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118811 is an aftermarket wiring harness confirmed to fit your vehicle by the manufacturer. This means it has been tested physically on that model and confirmed to work as designed. It has been confirmed to fit 2018-2020 VW Tiguan as well as 2019-2020 Tiguan Limited models. It draws power directly from your vehicle battery so it doesn't compromise the factory wiring but rather just captures signal. This is...
    view full answer...
  • Is There an Alternative to Connecting a T-One Trailer Wiring Harness to 2020 VW Tiguan Battery?
    The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118811 should be connected directly to the vehicle battery. This protects your vehicle wiring and it make sure you don't end up with a blown fuse or short circuit. The module draws 7.5 amps per circuit for the tail lights and 5 amps per circuit for stop/turn lights. The battery powers the module which in turn powers the trailer lights. It keeps the module and trailer from drawing power from the vehicle turn/stop...
    view full answer...
  • Can the Rear 12 Volt Cig Outlet Be Used To Install T-One Vehicle Wiring Harness On 2019 VW Tiguan
    The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118811 is an excellent option for a 2019 Volkswagen Tiguan. In regards to installation, the power wire must be run to the battery as specified in the installations. The rear cigarette lighter outlet cannot be used for this purpose as it does not have the proper rating.
    view full answer...
  • Trailer Wiring Harness Recommendations for 2018 and 2012 Volkswagen Tiguan
    For the 2018 Volkswagen Tiguan we have the Tow Ready 4-way wiring harness part # 118811 which is a confirmed fit and would work well. For the 2012 you'd need to go with the # 118675 which fits the older version. The part numbers are very similar with the only difference being that the 6 and 7 are switched. I only mention that so you don't accidentally order the same harness twice.
    view full answer...
  • 7-Way Trailer Wiring for 2018 Volkswagen Tiguan
    To add a 7-way to your 2018 Volkswagen Tiguan you need to add a 4-way connector # 118811 and after adding a 4-way you can convert it to a 7-way with # ETBC7 which is a universal 7-way wiring kit. The 7-way has to have the 4-way to work. I have attached an install video to help you through the installation process. I also recommend picking up a brake controller since you're already going to be doing a lot of wiring it is going to make life a lot easier down the road. Tekonsha # 39510...
    view full answer...
  • Will Curt Trailer Hitch Receiver C13381 Fit A 2021 Volkswagen Tiguan
    I would be happy to help! First the Curt Trailer Hitch Receiver # C13381 is indeed confirmed to fit your 2021 Volkswagen Tiguan. The reason it was pulled down as a confirmed fit for a bit was due to the 2021 Tiguan requiring mounting hardware where the 2020 and older used factory hardware. Curt realized this issue and is not including the hardware with the # C13381 so it can be installed on your Tiguan. Between the # C13381 and # C12177 you were looking at I recommend the # C13381...
    view full answer...
  • Recommended Trailer Hitch Receiver For 2021 Volkswagen Tiguan SE
    It is possible that the EcoHitch Hidden Trailer Hitch Receiver # 306-X7395 you were looking at could fit your 2021 Volkswagen Tiguan, but EcoHitch has not had a chance to test it as of 6/1/2021 which is why we do not list it as a confirmed fit. Instead of getting the hitch and hoping it fits, I recommend install the Curt # C13381 instead which is confirmed to fit your vehicle. The # C13381 has a 525lb tongue weight rating, 3500lb trailer weight rating, and when we installed this on...
    view full answer...
  • Best Trailer Hitch Receiver For 2021 Volkswagen Tiguan SEL Premium R-Line
    I would be happy to help! For your 2021 Volkswagen Tiguan SEL Premium R-Line I recommend the etrailer Trailer Hitch Receiver # e43ZR as it is confirmed to fit all models of your Tiguan. This hitch has a hidden crosstube meaning that once installed only the receiver itself will be visible, and the 2" receiver gives you the most options when it comes to accessories like a bike rack, cargo carrier, or ball mount. If you are planning on towing a trailer with your Tiguan you will need...
    view full answer...
  • Best Hitch Recommendation for a 2019 Toyota Highlander
    For your Highlander I recommend the etrailer.com Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2" part # e98844. This hitch has a really nice matte black finish on it that holds up against the element really well when compared to the others available. It offers a 900 lb. tongue weight rating and a 6000 lb. gross trailer weight rating. You can use weight distribution if you have that need which brings the rating up to 8000 lb of gross trailer weight. This exceeds...
    view full answer...
  • Trailer Hitch and Wiring that Fits 2021 Volkswagen Tiguan
    We have a Draw Tite hitch that fits your 2021 Volkswagen Tiguan with the part # 76192 which is also mostly hidden. Then for trailer wiring you'd want the Tekonsha kit part # 118811 and you'd be set. This is the easiest to install and most reliable option for your vehicle. 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 drop. It...
    view full answer...
  • Will Draw-Tite Trailer Hitch Receiver Interfere With Auto Lift Gate Sensor On 2021 Volkswagen Tiguan
    You are correct that Draw-Tite Max-Frame Trailer Hitch Receiver # 76192 is a confirmed fit for your 2021 Volkswagen Tiguan. I reached out to Draw-Tite directly and my contact mentioned that they have not heard of any issues from customers who installed the Draw-Tite # 76192. With the hitch installed you may have to move your foot to either side of the receiver to find the sweet spot, and just remember where that location is, but after doing it a few times it will become second nature. If...
    view full answer...
  • 2020 Tiguan 4Motion Towing Capacity
    With the vehicle towing capacity of 1,500 pounds, you should not exceed that weight. This could cause a failure and would most likely void the warranties on both the vehicle and trailer. So yes, the 100 pounds definitely makes a difference. If you are indeed going with this model trailer, then you would want to travel with the tanks empty and as much weight removed as possible. The electric brakes will not help with towing capacities, but definitely helps with stopping. To get those...
    view full answer...
  • Do I Need To Modify My 2018 VW Tiguan To Fit The Curt Trailer Hitch Receiver # C13381?
    The Curt Trailer Hitch Receiver # C13381 will fit your 2018 Volkswagen Tiguan with no modification unless your Tiguan has excess sealant in the areas where the hitch will mount. The receiver will bolt on to existing weld nuts that are in the frame of most Tiguan's. If your model does not have the factory hardware for the receiver the kit includes the necessary hardware to install on your Tiguan. I recommend the Tekonsha T-One Vehicle Wiring Harness # 118811 to allow for you to haul...
    view full answer...
  • Trailer Hitch Receiver For 2021 Volkswagen Tiguan
    For your 2021 I recommend using the Curt Trailer Hitch Receiver # C13381 as it is a confirmed fit for your 2021 Volkswagen Tiguan S. It features a 2" receiver allowing you to use a wider range of ball mounts and hitch mounted accessories. The receiver is rated for 525lbs of tongue weight and 3,500lbs trailer weight. Be sure to consult your VW dealer for your maximum tow ratings. The EcoHitch Hidden Trailer Hitch Receiver # 306-X7395 has not been confirmed to fit your Tiguan and based...
    view full answer...
  • Recommended Vehicle Wiring Harness For 2021 Volkswagen Tiguan
    The etrailer Trailer Hitch Receiver # e43ZR you were looking at for your 2021 Volkswagen Tiguan does NOT include a vehicle wiring harness. For a compatible vehicle wiring harness I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118811 as in our experience the Tekonsha harnesses hold up better over time, and have an overall more durable construction. Lastly to complete your towing setup you will need a ball mount so I have included a link to a helpful...
    view full answer...
  • Does Curt Class III C13381 Hitch Include Hardware for 2021 VW Tiguan With No Weld Nuts In Frame
    This issue came up just the other day. It turns out that not all the 2021 VW Tiguans have the weld nuts installed in the frame, I'm told that whether the nuts are in the frame depends on the factory where the vehicle was assembled. In any event, Curt realized that this was a problem with the 2021 Tiguan models and recently began including hardware for vehicles that don't have the weld nuts in place. We checked our current stock and found that all the # C13381 Curt Class III hitches we...
    view full answer...
  • Is Rear Bumper Reinstalled or Discarded During EcoHitch Installation on 2018 Volkswagen Tiguan
    In order to install the # 306-X7395 EcoHitch Hidden Trailer Hitch Receiver on your 2018 Volkswagen Tiguan you will need to remove the bumper fascia as well as the bumper cross member. The # 306-X7395 will replace the cross member and the bumper fascia will be reinstalled over the hitch. You will not reattach the bumper cross member. I recommend saving it should you need it for some reason at a later time. This Class III hitch has a maximum gross trailer weight of 5,000 lbs and tongue...
    view full answer...
  • Will The etrailer Trailer Hitch Receiver Fit A 2021 Volkswagen Tiguan SE?
    It sure will! The etrailer Trailer Hitch Receiver # e43ZR you were looking at is confirmed to fit all models of the 2018-2021 Volkswagen Tiguan so it will fit perfectly on your 2021 Volkswagen Tiguan SE 7 Passenger. This hitch has a 525lb tongue weight rating and 3500lb trailer weight rating making it a very versatile hitch good for carrying a bike rack or cargo carrier, or for using a ball mount to tow a trailer. If you are planning on towing with your Tiguan you will also need...
    view full answer...

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




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C
Employee Shane H
Test Fit:
Shane H

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.