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 # 118808
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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118808 - Powered Converter - Tekonsha
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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. Call 800-298-1624 to order Tekonsha custom fit vehicle wiring part number 118808 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 (34114)
  • Q & A (5)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118808

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

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 threshold panel and corner felt trunk liner 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 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.



118808 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118808 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 - 118808

Average Customer Rating:  4.8 out of 5 stars   (34101 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.

- 118808
by:
2019 Mazda 3

This was the only plug and play harness I found at the time for my car, but so far I'm very pleased. Due to amount of technology and sensitive electronics in these new cars, I wouldn't want to try to probe a bunch of wires and connect a standard trailer light kit. The voltage and current with the LED tail lights might not even trigger a standard kit. This kit made it much easier, although it's much more involved as you have to remove a bunch of panels, and run power to it. It's great that absolutely no wires were cut or tapped, and no holes needed to be drilled. Couple of install notes: * The instructions are for a sedan, but I installed it on a hatchback where you have to remove a few more panels. Nothing too complicated, but take your time and look for all the fasteners. The plug for the right rear is a little more involved as it's behind a few more things. * The rear hatch weather stripping has to be pulled away in a few areas. It's got a sealant underneath it that is easy to get everywhere, so remove the stripping slowly and try not to make a mess - it sticks to everything. * Instead of running to the battery, I used an add-a-tap fuse connection at the drivers kick panel fuse block. I used a 15amp fuse just like the package came with. * I taped the module in the left rear area under the taillight where you ground it to a factory ground point near by.



- 118808
by:
2020 Mazda CX-30

Great product, excellent customer service! Would recommend to anyone looking for a trailer hitch and harness.



- 118258
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Product quality very high, delivery very fast, shipping container (cardboard box) was not strong enough to support handling/shipment, box bottom was ruptured with hitch assembly hanging out, box should be supported stronger, no parts missing, hitch was scratched up somebut, nothing that a little black paint didn't fix. I installed the wiring harness connections and fuse box on the external side of the vehicle to eliminate having to take apart the internal sheet metal panels and providing easy access to the fuse in the event of fuse failure, this eliminates the necessity of interior Panel removal to change a fuse. Easy installation, product has great great design features ,great customer service with prompt delivery. Just ordered the bracket (#18140) to secure the 4 prong plug to the hitch neatly and secure to eliminate the loose plug. (not shown in photos (Bracket in transit),


Comments
Great, works like a charm.
Anthony J - 09/27/2020


- 118265
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


I purchased this for my 2013 Honda Pilot EX-L. I have not used the wiring harness yet, but the installation was extremely easy and quick. The instructions were very straightforward, and I was able to install everything within 30 minutes. Everything you need is inside the package except some bolts/nuts to mount the connector. I decided to cut out a hole and drill some holes for bolts. I opted for some black ones to match the colors. I'm extremely happy with this product and etrailer's fast and reliable service.



- 118252
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Just installed Draw Tight hitch, wire assembly along with the brackets for a nice look. Everything went smooth with installation and it has a nice clean look as the hitch is well hidden. This is going to work for our bike rack and the cargo carrier I am now going to by. Now I can also get a small utility trailer to pull and haul stuff. I strongly recommend etrailer for all your needs as they communicated with me the whole way through and readily replaced a lock unit that somehow came without the key. Customer service is top notch.


Comments
Absolutely Fine!
Scott N - 04/26/2020


- 118248
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Wish I bought etralier's tow harness earlier. Easy installation. Toyota dealership sold me the wrong one and of course waited too long to return. But use some of the parts from that harness on the one from etrailer(see pics). Would order again from etrailer. Thank you



- 118264
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


This is a perfectly tailored product for the do-it-yourselfer who with a little help adds a nice hitch to his vehicle. Getting an older vehicle's OEM installed weld nuts clean takes most of the time followed by installing the two washers and nuts in the fascia area. That part needs patience as the work area is limited. The Curt LED 4-Way Flat Connector (Vehicle End) Tester makes it very simple to verify the Tow Package - 4-Pole Flat Trailer Connector that is a snap to install to the vehicles pre-existing harness. One point to pay attention to in the instructional video is when pulling the square washer and bolt through the channel. They must slide in single file as shown. If you try to pull with the bolt through the washer it will get stuck and you will need to fish it out. So bottom line. Great product. Great support. Steve Stewart


Comments
Everything from the hitch to the wiring still works perfectly. Very pleased with the results
Stephen - 05/07/2020


- 118269
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Plug & play for 2020 Kia Sorento. Dinged a star because the trailer connector does not fit the extra bracket well. It does not appear to have been designed for a bracket mount. I had to force fit and secure in place with a zip tie.



- 118265
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Needed a harness for my 2015 Honda Pilot LX and didn’t want to pay a king’s ransom for dealer parts and install. Ordered from etrailer and got a deal. Came with everything I needed and also had excellent, easy to understand instructions. Works perfectly.


Comments
This harness has worked like a charm. No problems at all.
Randy B - 06/01/2020


- 118248
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Instructions provided with adapter are good. My 04 Highlander without tow package had the connector under rear, driver-side cargo tray. Lift the cargo floor, remove the tire-change-tool tray, remove the two plastic nuts on the bottom of the left-side tub, and lift it out. Also under that storage tub is an unused 6mm threaded hole in the body to be used for the ground. Put a fuse in the correct spot of engine compartment fuse block (mine was empty) and good to go. See underside of fuse block lid for tow adapter fuse placement.


Comments
Used 20 times this summer with no issues. I would buy again.
Michael A - 01/09/2021


- 118252
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


FITS the new 2020 HIGHLANDER! There is a new connector with the 2020 Highlander redesign under the driver side rear bumper. This cable plugs directly into the Highlander connector. See photo. There is no need to route or run wires for the trailer wiring. You will also need a converter to provide the correct signals to this cable. I recommend using the Toyota Plug-n-play converter part number: PT725-48200. It’s around $60 online. Be aware it is installed behind a panel located next to the driver’s side second row seat. Toyota completely changed the vehicle wiring for the 2020 model year. I also recommend the CURT C99FR hitch. Fits perfectly, easy to install and hides behind the bumper.



- 118266
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


This kit worked great. It took about an hour to install on my 2005 Xterra. The process was just like the video on etrailer.com. The only difference was that I mounted the bracket directly to my bumper instead of the hitch.


Comments
Working great. Im glad I purchased the 7-pin version for this car
Keith - 07/16/2020


- 118266
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


The hitch is great, but the screws for the electrical connector have rusted.


Comments
It’s still working. The screws are still rusted, though.
Tim M - 07/18/2020


- 118253
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Jesse at eTrailer help me with configuring my 2009 Honda Pilot to be able to pull legal loads. I had previously installed their 4 pin connector but I want to be able to use trailers with brakes to full extent. I added a Redarc brake controller in a convenient location. Easy to replace the current harness with the 7 way connector. A little more work to pull panels to locate the Redarc control head exactly where i wanted it, but no biggie. As always, great customer service and a great product. Thanks Jesse and all at eTrailer.



- 118259
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Plug and play! This trailer power cable plugged directly into my factory Cadillac SRX wire harness. No wire cutting and splicing, absolutely the easiest installation I could imagine. Highly recommended for anyone who can use it. See photos showing the purchased product and where it plugged into the factory wiring harness.



- 118255
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Excellent prompt personal service. Website made it easy to select the correct components for my particular SUV. Was kept informed throughout the delivery process, I knew exactly where my package was and when it would arrive. Would certainly recommend using etrailer - a great and professional service. Fitting the wiring was a breeze, once the appropriate socket for the trailer module was located (hiding behind the rear R/H side fascia panel)



- 118269
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


I was very happy with etrailer.com The items were delivered in 3 days. The wire harness was an easy plug and play. And mounted nicely to the hitch wit items the short mounting bracket and 4-Pole mounting bracket.



- 118251
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Excellent product. Delivered fast and painless. Fits perfectly. Please note the factory will usually leave the required fuses and relays uninstalled even if you have the Tow Package. My 2009 Escape needed 2 mini fuses (1 - 15A and 1 - 20A) and 3 relays to energize the harness. These were available from the auto parts store. Refer to the photos. Photos #1&2- The two pages from the owner's manual that describes the sizes and locations of the fuses and relays. Photo #3- A photo of the fuse box located under the hood (front -left) with the fuses and relays installed. Photo #4- The installed connector.



- 118252
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


I ordered and received a trailer hitch and wiring kit for my 2015 RX350 and also received a very informative video with it. It fit great and is almost invisible and no drilling was necessary. The only issue I had was I was supposed to reuse 2 of the bolts to rehang the exhaust but my bolts were tapered on the end and wouldn't fit so I had to use some generic bolts. But it's still a great product.



- 118269
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Kia dealer installed the original 4 way flat trailer wiring 2 years ago. The tester showed 2 dim lights before I ever used it. Disregarded the dim lights and added the ignition 12V and brakes control wires to a 7 way Bargman connector. I had running lights without anything on which worked only 2 times. Then no right brake or signal flash. Removed the factory Kia 4 way flat and observed no fuse! THEN I ordered the eTrailer equivalent WITH a 15 amp fuse. The tester looked good with no lights initially then the brake, running and turn lights tested fine. Hooked up and tested fine also. Happy customer!


Comments
etrailer Product flawless. KIA recalled their wiring harness and didn’t include my VIN. Unresolved still going on 2 years later...
Archibald S - 01/29/2021


- 118247
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


I recently purchased a pontoon boat that had hydraulic brakes. First time out had to back up the trailer uphill, not a good experience with the brakes locking up. My F150 has only factory 4 pin trailer connections so I looked for a 5 pin option with reverse brake override power. Etrailer is my first stop on trailer parts. The wiring harness and relay in the kit fit perfectly, but needed a large adjustable pliers to snap to the connectors together on one connector. Had to fabricate a bracket as the overall length of the 7 pin receptacle and connector means it had to be set 2” towards the bumper to clear the hitch assembly (also e-trailer). A few tie wraps later everything was done and tested. Instructions were good, but didn’t need to drop the spare to get at everything. Would recommend.



- 118266
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Everything I bought a year ago continues to work well. Towed my trailer with your hitch; stepped on the brakes; all is well! Thanks.


Comments
Still working perfectly
Mgoodst - 12/16/2020


- 118251
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


Simple addition to my 2008 Ford Escape to extend the factory trailer wiring harness from behind the bumper down to my new Drawtite trailer hitch reciever. I was fortunate enough to have the wire harness already installed including the fuses and relays. Might have taken 5 minutes to install and came with 2 zip ties to secure the extra wire. No tools needed.



- 118264
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


I give this product a 10 better than excellent! Until I found by accident, the etrailer video i had started to purchase a trailer harness at the auto parts store and splice the wires to my tail lights like i did years ago. Thanks to YouTube, my iPhone and etrailer i was able to install this trailer wiring within an hour, no fuss, no mess. Thank you so much. Product Review: first picture my 2012 GMC Terrain , Second picture, searching for the plug outlet for the trailer lights. Third picture, thanks to the E-trailer you tube Video I was able to locate the outlet. Forth picture, I cut some of the panel away to make easy excess to the plug outlet, I then , took an air hose and cleaned any debris in the outlet. Fifth picture, I plugged in an tested my new trailer wiring harness, worked perfect. Sixth picture, the finished product, I used a Felcro tie and attached the harness to a ring .


Comments
The trailer harness kit is great! I’ve recommended etrailer to many people
Paul H - 06/07/2019



- 118253
by:

Review from a similar T-One in Custom Fit Vehicle Wiring


E Wiring kit EZ to install with one exception. The 7 way Receiver does not fit the universal adapter that mounts the the vehicle. You have to drill additional holes. It took twice as long to complete this portion of the job. Why don’t they just include the correct part? Hence the three stars...


Comments
Manufacturers typically do not include a mounting bracket for the wire connector because each install looks a little different. My favorite 7-Way Mounting Bracket is part # PK12711U
Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
$12.04
because it is designed with slotted holes, allowing more sizes of 7-way plugs to fit than the brackets that only have a single size configuration.
-- Etrailer Expert Victoria B - 03/23/2020

Comments
Product stopped working. Checked fuses, no power to the trailer light. Extremely disappointed. Would not purchase this again, No stars not an option!
James V - 03/21/2021

Thank you for your review. If everything on your vehicle side looks okay, it may be your trailer wiring. Here is a help article to help you troubleshoot.

-- Etrailer Expert Sierra K - 3/22/2021

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Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • Tips for Routing Power Wire of Trailer Wiring Kit for 2019 Mazda 3
    When routing the power wire of the Tekonsha trailer wiring kit part # 118808 to the vehicle's positive battery post we don't have an exact route you'll need to take for your 2019 Mazda 3 but I can help steer you in the right direction. Basically you want to route it up to the front of the vehicle from underneath it securing it with the included zip ties avoiding anything hot (exhaust) and moving components (suspension). I attached a help article on routing the power wire for you to...
    view full answer...
  • Recommended Vehicle Wiring Harness For 2020 Mazda 3 Sedan
    There sure is! The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118808 is confirmed to fit your 2020 Mazda 3 Sedan, and plugs into the factory connectors. The only thing you will need to do is run the black wire to the the battery with the included fuse to keep the harness from overloading your vehicle's factory wiring. I included the written instructions of the # 118808 for you to take a look at.
    view full answer...
  • Hitch Recommendation and Cargo Carrier For 2020 Mazda 3 Hatchback
    I recommend the Draw-Tite Class I SportFrame hitch part # 24984 which will fit the 2020 Mazda 3 without drilling and will give you a 1-1/4" receiver opening for a cargo carrier or other accessories like a bike rack. The hitch is rated for 200 lbs of tongue weight in the cargo carrier so you do not want to exceed the tongue weight of the hitch. For a cargo carrier I recommend Class I Surco Cargo Carrier part # 52017 which will provide you with 48" long x 20" wide of usable space in the...
    view full answer...
    Image 1 for Image 2 for
  • Hitch Fit for 2020 Mazda 3 Sedan
    The Draw-Tite # 24982 Class I hitch is a fit for 2019 - 2021 Mazda 3 Sedan, so it'll work perfectly for you. If you'll be using the hitch for light duty towing, you'll also need a trailer wiring harness like # 118808, a ball mount like part # 3593 and a trailer ball like # 19256 for a 1-7/8 inch ball or # 19258 for a 2 inch ball.
    view full answer...
  • Which Hitch Fits 2019 Mazda 3 Hatchback All Wheel Drive
    Yes the Draw Tite hitch part # 24984 does fit the all wheel drive models of the 2019 Mazda Hatchback like you have! We had a customer with your exact vehicle leave us a review letting us know if fit perfectly as well which I attached a picture of. If you were in need of trailer wiring as well the correct fit is the part # 118808. This kit installs easily and has a very reliable converter box so it will last a long time!
    view full answer...
    Image 1 for

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Info for this part was:

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