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

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

Item # 118683
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Custom Fit Vehicle Wiring

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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector 4 Flat 118683
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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. 1-800-496-5010 to order Tekonsha custom fit vehicle wiring part number 118683 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.
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  • Reviews (53)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118683

  • 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
    • Connect hot lead to power cable stud
  • Includes ModuLite power converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects 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: 4.2 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 inside your rear cargo area, behind the tail lights on both the driver's side and passenger's side. You will have to remove some interior paneling to access this harness. Once you've plugged in the T-connector, run the hot lead to the power cable stud on the driver's side and connect the wire using the ring terminal. Then insert the included 15-amp fuse into the fuse holder.


Once installation is complete, the 4-way connector will be stowed in your trunk.


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.



118683 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details 118683 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 - 118683

Average Customer Rating:  4.9 out of 5 stars   (53 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.

by:
2019 Volvo XC90

I have a 2019 Volvo XC 90. It took about 2 hours to install The Drawtite hitch and taillight kit. Taillights worked perfectly. No programming the cars computer. Total price etrailer: less than $300. Volvo wanted $1,600.
etrailers sales person: home run. Very nice.




by:
Volvo

The directions are OK except you have to remove the "threshold" before you can remove the side panels. Also there is a little cap over the anchors that has to be removed to gain access to the hold down bolt. The battery on a Volvo 2019 is not in the engine compartment, but under the spare tire. Much easier to tie into.




by:

Installed myself. Good video instruction! Perfect fit!




by:

I went to use it after a winter of not using it and all the lights on my trailer worked perfectly. I had a garage install it for me.




by:

Great product. Easy install.




by:

Very easy to install!!




by:

Product delivered as promised and installed without any problems!




by:

Easy to put on my car. Accurate instructions with all parts as required. Thanks




by:

Be careful loosening the bolt to the negative battery terminal. The little box connected to the negative cable is only soldered or brazed together and while loosening the nut mine broke in half, rendering my car undrivable. Of course in the video, the nut is very easy to get off and there is no mention of the fact this piece can break.

I'm also not sure why the loop connector doesn't fit the battery terminal when this harness is supposedly made for the vehicle.




by:

Great product and fairly easy installat ion.




by:
2018 Volvo XC90

great instructins and understanding on what to do.




by:
2017 Volvo XC90

Frankly working with etrailer is as easy as working with [online retailer], the one big difference is the personal interaction and the review/installation videos. I installed the wiring on my wife's Volvo just by watching the video and I am NOT mechanical in any way.

etrailer runs the way, I run my business. Customer-centric, communicative and attention to detail.

Well done!!




by:
2016 Volvo XC90

Works great with the 2016 Volvo XC-90




by:

They do a great job of making this easy. I was really surprised at how well this went.




by:

This is an excellent product and the customer service for install is great. I will only use etrailer in the future.




by:

The installation video was spot on! Super straightforward.




by:

Simple way to have lights




by:
2016 Volvo XC90

The wiring fits perfectly and is easy to install. I would have given 5 stars if the instructions were easier to read/see. I couldn't even tell what the pictures were because the quality was so bad. I had to take interior panels off and feel around to find where the plugs were.




by:

Fast delivery and works perfect easy as sembly.




by:

Easy installation! Worked excellent




by:

Shipped before anticipated date. Arrived when projected after shipment. etrailer delivered to what they said.




by:
2019 Volvo XC90

everything worked perfectly, i was very happy with how easy this was to install and how well it worked. it did not mess with any of my car sensors or anything so i am very please. i would totally buy again if needed. directions could be a bit better in the box but youtube had some quick and easy help to make it work well.


Comments
works perfectly on our 2019 Volvo xc90, i am very happy with it.
David M - 10/20/2020


by:
2016 Volvo XC90

This was incredibly easy to install with the online video. The wires were all plenty long enough which is where a lot of companies cut corners since copper is very expensive. Thanks for selling a great product, it is appreciated.


Comments
Thanks for asking. I’ve only towed a small garden trailer a few times so far but I wouldn’t hesitate to haul a max load across the country and back. The Volvo suv the hitch is on stays garaged so I can’t give good feedback on how it would hold up in a salty slushy winter. Luckily we are in Georgia. : This was the third hitch I have installed on my vehicles and each one was perfect. If I end up needing another hitch I will be back. Thanks, have a nice day.
Nicholas - 03/14/2019


by:

Good price and high quality product. Install was very straightforward with the detailed videos at etrailer. Saved over $1000 versus dealer install!




by:

Fairly price, clear instructions for the type of vehicle, easy to install. I used it with a to light up several different trailers with no issues



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53
Show More Reviews

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



  • Best Trailer Wiring Kit for 2019 Volvo XC90 and is Trip to Dealer Required for Reprogramming
    The best 4-way trailer wiring option we have for your 2019 Volvo XC90 is the Tekonsha kit part # 118683 as it installs very easily and has a very reliable converter box which will do a great job being resistant to trailer wiring shorts. I attached an install video for this for you to check out on a similar 2018 XC90 as well. There would be no need to take the truck to a dealer either.
    view full answer...
  • Does 2019 Volvo XC90 Need to be Reprogrammed After Installing Tekonsha Trailer Wiring Harness
    The Tekonsha T-One Vehicle Wiring Harness # 118683 that you referenced, which is confirmed to fit your 2019 Volvo XC90, will not require any kind of reprogramming or flashing on the vehicle for proper operation. The harness will simply be plugged into factory ports behind the tail light assemblies to tap into their circuits for powering a trailer's lights while towing. Once installed the provided 4-Way connector will be ready to use with no further modifications needed. I have attached...
    view full answer...
  • Trailer Wiring Fit Recommendation for 2017 Volvo XC90
    The Tekonsha trailer wiring part # 118683 is a confirmed fit for your 2017 Volvo XC90. Since it installs by plugging in line with the taillight harness of the vehicle it would not require any computer programming. Does your trailer happen to have LED taillights? Sometimes that causes issues with factory trailer wiring harnesses.
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  • Trailer Lights Not Working when Connected to a 2017 Volvo XC90
    If the dealer installed the Volvo wiring harness on your 2017 Volvo XC90 then they may need to do something to make it active. I would inquire with them but they should have done that when the harness was installed. If you are using wiring harness # 118683 then make sure the fuse is inserted in its power wire and that the power wire is connected to the battery as indicated in the instructions. Also make sure the white ground wire is attached to a bare metal surface. Also make sure the...
    view full answer...
  • Where Is 4-Way Trailer Wiring Connector Stored on 2016 Volvo XC90
    The 4-way trailer connector at the rear of your 2016 Volvo XC90 that is installed using the wiring harness # 118683 stores in the trunk of your vehicle when not in use. When you are going to be using it, the harness will out of your trunk. The padding between the trunk lid and the vehicle will protect the wiring from being damaged with the trunk lid closed on it. Storing the connector inside the vehicle helps protect it and keep it clean. I'm glad the install video fo the Draw-Tite...
    view full answer...
  • Where Does Power Wire of Tekonsha Trailer Harness Run on 2022 Volvo XC90 Recharge
    The power wire of the Tekonsha trailer wiring harness part # 118683 actually doesn't need to run to a battery. It runs to power cable stud that is in the access panel where the rest of the harness installs in your 2022 Volvo XC90 Recharge so there wouldn't be a need to access a traditional battery.
    view full answer...
  • Is Reprogramming Required To Install A 2019 Volvo XC90s Wiring Harness
    When installing the T-One Wiring Harness # 118683 on your 2019 Volvo XC90 there will be no need to reprogram. To help in your process, I've included an installation video for a on a '18 XC90. The video will show that the 4-way connector works without reprogramming. Should you decide to do some towing a great Ball Mount Kit is part # 989900. It comes with two ball mounts - one with a 3/4” rise or 2” drop and the other with a 2-3/4” rise or 4” drop - a 1-7/8” hitch ball, a 2” hitch ball,...
    view full answer...
  • Does Installing Trailer Wiring on 2019 Volvo XC90 Require Reprogramming Computer
    The trailer wiring harness from Tekonsha part # 118683 that fits your 2019 Volvo XC90 does not require a trip to the dealer for any computer programming. Your vehicle's computer would not know it's installed at all so it's not something that would cause any issue like that. To see the entire install process on a similar 2018 XC90 check out the install video link I attached to this page. If you need a trailer hitch too we have the Draw Tite part # 76194 which is a 2 inch hitch and mostly...
    view full answer...
  • Recommended Trailer Hitch and Wiring For a 2019 Volvo XC90
    I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit part # 76194 for the 2019 Volvo XC90 because of it's concealed cross tube design for a nice clean looking install. The only portion of the hitch that is visible once installed is the square receiver tube. I have attached a photo and installation video for your reference. The video is on a 2018 Volvo but the installation will be the same for your 2019. For the wiring, I recommend Tekonsha T-One Vehicle Wiring Harness...
    view full answer...
    Image 1 for
  • Is Fascia Trimming Needed for Draw-Tite Trailer Hitch Install on 2017 Volvo XC90
    Yes, a small amount of otherwise unnoticeable fascia does need to be trimmed to install the Draw-Tite Trailer Hitch # 76194 on your 2017 Volvo XC90. I have added a cut out of the linked installation instructions which show you the small section under your Volvo that needs to be trimmed. This is required because it allows room for the receiver to get close to the bumper, giving your Volvo XC90 a hitch that has a hidden crosstube and optimal ground clearance. I have added a link to a video...
    view full answer...
    Image 1 for
  • Trailer Hitch and Wiring Harness for 2021 Volvo XC90
    Let's start with the trailer hitch receiver for your 2021 Volvo XC90, and for towing what you will need is the Curt Trailer Hitch Receiver # C13233. This hitch has a 6,000 lb towing capacity and 900 lb tongue weight capacity though I do recommend checking your owner's manual to see what the capacity of your Volvo is and abide by that figure. Then for a wiring harness I highly recommend the T-One Vehicle Wiring Harness # 118683. This harness is the best for your XC90 because it has the...
    view full answer...
  • Hitch and Wiring Recommendation For 2019 Volvo XC90
    I recommend Draw-Tite Class III Max Frame Receiver Hitch part # 76194 for the 2019 Volvo XC90. The Draw-Tite Class III is a concealed cross tube design so the only portion of the hitch that is visible once installed is the receiver. I have attached a photo and an installation video for your reference. I recommend the wiring to illuminate the trailer lights with Tekonsha T-One wiring harness part # 118683. The Tekonsha brand converter boxes attached to the wiring harnesses are known to...
    view full answer...
    Image 1 for
  • Trailer Hitch and Wiring Recommendation for a 2017 Volvo XC90
    Yes, we have the Draw Tite hitc part # 76194 which is a confirmed fit for your 2017 Volvo XC90. This is a Class III hitch with a 2 inch opening that would work well for towing or carrying hitch accessories. 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 also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and...
    view full answer...
  • Trailer Hitch Recommendation for 2018 Volvo XC90
    The correct Draw Tite hitch for your 2018 Volvo XC90 is the Draw Tite part # 76194 which is a custom fit and would work well. For trailer wiring you'd then want the part # 118683 which is also a custom fit. 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 also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and...
    view full answer...
  • Is Reprogramming Necessary to Install Wiring Harness on 2016 Volvo XC90?
    Though I cannot speak for the parts that Volvo uses, there is not going to be any reprogramming necessary to install T-One Wiring Harness # 118683 on your 2016 Volvo XC90. In fact, you can take a look at the complete installation of this harness in the video I linked of it being installed on a '16 XC90 and you can see that the 4-way connector works without reprogramming. And though no round tube hitches are available for your Volvo XC90 I do recommend the Draw-Tite # 76194; you can see...
    view full answer...
    Image 1 for
  • Hitch Confirmed to Fit the 2022 Volvo XC90
    We do! The Draw-Tite Max-Frame Trailer Hitch Receiver # 76194 is confirmed to fit your 2022 Volvo XC90. This hitch has a bolt-on, no-drill installation and will provide you with a 2" receiver opening which is the most common size used for hitch mounted accessories such as bike racks, cargo carriers and ball mounts. If you plan to do any towing with your XC90, you can pick up the T-One Vehicle Wiring Harness # 118683 and the etrailer Ball Mount Kit # 989900 to round out a tow package.
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  • Ground Clearance of Curt 13233 Installed on 2020 Volvo XC90
    Once installed, the ground clearance under the Curt # C13233 receiver hitch will be right about 10 inches. If you'll be towing with the hitch, you'll need a drawbar, a trailer ball and a wiring harness to complete your towing system. For a wiring harness, use # 118683. I'd also recommend our etrailer.com ball mount kit, part # 989900. The kit contains two different ball mounts, a 1-7/8 inch and a 2 inch ball and two hitch pins. I've linked you to installation videos for the hitch and...
    view full answer...
  • Will Curt Trailer Hitch Interfere with Liftgate Sensors on a 2016 Volvo XC90
    No, the Curt trailer hitch # C13233 is not known to interfere with the sensors on your 2016 Volvo XC90. However, the position/angles of the sensors can vary from vehicle to vehicle so some people may have to trigger the sensors by kicking their foot off to the side instead of the normal place they are triggered. If you plan on doing some towing I recommend 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...
    view full answer...
  • Will Installing Curt Hitch on a 2016 Volvo XC90 Interfere with Hands Free Liftgate Operation
    No, the Curt trailer hitch # C13233 is not known to interfere with the sensors on your 2016 Volvo XC90. However, the position/angles of the sensors can vary from vehicle to vehicle so some people may have to trigger the sensors by kicking their foot off to the side instead of the normal place they are triggered. If you plan on doing some towing I recommend 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...
    view full answer...
  • Do Bumper Sensors of 2019 Volvo XC90 Require Recalibration After Installing Trailer Hitch Receiver?
    The Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" # 76194 is a straight forward install as you stated. It does not require any recalibration of the sensors when you reinstall the bumper unless they are damaged when removing and reinstalling the bumper which would only be an issue if you physically damaged the bumper or sensors. If you will be using this hitch for towing, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118683...
    view full answer...
  • Recommended Trailer Hitch and Towing Accessories for 2019 Volvo XC90
    There sure is! You'll want to go with the Draw-Tite # 76194 that you'd looked it, which is the correct fit. Once installed, the hitch will be almost completely concealed behind the bumper cover, the only things visible will be the receiver tube and the safety chain loops. If you'll be towing with the hitch, you'll need a wiring harness, a ball mount and the properly sized trailer ball to complete your towing setup. For wiring, go with part # 118683 For ball mount, part # C45070 For a...
    view full answer...
  • How Much Does Adding Curt Trailer Hitch Reduce Ground Clearance on a 2016 Volvo XC90
    Take a look of the picture I have included showing Curt trailer hitch # C13233 installed on a 2016 Volvo XC90. If you measure from the bottom of the piece pointed out in the picture down about 4-1/2 inches that is approximately where the bottom of the hitch will be after it is installed. That will give you a good idea of the approximate hitch location and thus the amount of ground clearance. I have driven extensively through New Orleans and there are some rough roads due to the flooding...
    view full answer...
    Image 1 for
  • Are Trailer Hitches For 2021 or 2020 Volvo XC90 Rated For Weight Distribution
    So there are actually no trailer hitch receivers at all for your 2021 Volvo XC90 that are compatible with a weight distribution hitch. That said, there is still an option to add a sway control unit, so long as your trailer has electric brakes (and not surge brakes); what you would need is a friction sway control unit, which is compatible with a 2" hitch. So let's start with the hitch that will fit both a 2020 and 2021 Volvo XC90: - Draw-Tite Max-Frame Trailer Hitch Receiver # 76194 The...
    view full answer...
    Image 1 for
  • 2019 Volvo XC90 Hitch Recommendation
    My recommendation is the Draw-Tite Class III Max Frame # 76194 for your 2019 Volvo XC90. This is a custom fit Class III hitch with a maximum tongue weight of 900 lbs. if you require wiring a suggest the T-One Vehicle Wiring Harness # 118683. And the etrailer Ball Mount Kit for 2" Hitches # 989900. There is second option of the Stealth Hitches Hidden Rack Receiver # SH27FR. This is a completely hidden hitch with receiver removed, providing complete concealment keeping your Volvo XC90...
    view full answer...


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