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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # 118259
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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118259 - Custom Fit - 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 OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118259 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 for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (191)
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Tekonsha Custom Fit Vehicle Wiring - 118259

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No 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 OEM tow package port - no cutting, splicing or tapping required.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point behind rear bumper
    • Plug in connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness, which is located just behind the rear bumper.


Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.



118259 Tow Ready T-1 T-Connector - OE Replacement 4-Flat

Installation Details 118259 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118259

Average Customer Rating:  4.9 out of 5 stars   (191 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 OEM tow package port - no cutting, splicing or tapping required.

- 118259
by:

Easy installation. Works great



- 118259
by:

I received the package and within an hour and 15 minutes I install the hitch laying on the ground with no jacks or hoist. I also cut out the back of plastic panel and install it and looks real professional . I was quoted over $400 for the same package. In my opinion the E trailer is definitely the best way to go. Thanks Gary


Comments
Still working great after a year. Its been from the heat of zflorida to the salt in Michigan. Great product, great price. Thank you
Gary R - 08/20/2017



- 118259
by:

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.



- 118259
by:
2015 Cadillac SRX

I was very pleased with the quality and the ease in which the hitch installed. Everything fit nicely on my 2015 Cadillac SRX. Attached are pics after the hitch was installed. I modified the original center panel by making a few cuts on the panel. I think it looks clean. Of course when I use the hitch I will have to take two screws out of the panel to remove. I used tie strips to secure the wiring to the top of the hitch. The panel hides the hitch & wiring while not in use.



- 118259
by:

I ordered the trailer wiring harness for my Vehicle.It arrived on time.And I innstalled it on my vehicle, and it work's properly.tank you!!!!



- 118259
by:
2010 Cadillac SRX

It took a little longer for delivery than I expected but it was exactly what I ordered and needed. It took only 2 minutes to install and the video was spot on. I also ordered the receiver hitch and that was perfect also. I got a few emails from a guy named George asking if everything was ok. Top notch company.



- 118259
by:
Cadillac

perfect fit for 2015 Cadillac SRX



- 118259
by:
2016 Cadillac SRX

A great experience overall!!! Paid extra for 3 day shipping, got the THE Draw Tight hitch in 2 days.....OUTSTANDING. Watched the installation video for my Cadillac SRX. Easy step by step installation, took less than 40 minutes to install ( easy- peasy). My first experience with etrailer.....Outstanding!!!!



- 118259
by:
2015 Cadillac SRX

I found the installation MUCH easier than I expected, the receiver fit perfectly! Also, the folks at eTrailer were VERY helpful, and my order arrived quickly and correctly! I installed it on a 2015 Cadillac SRX.



- 118259
by:

Very easy to install. Just remove protective cap from existing wiring and plug in this harness, use the included zip ties to hold the slack and ready to go.



- 118259
by:
2015 Cadillac SRX

Can't get much easier. Literally plug into the existing wire harness and you're good to go. Highly recommend.



- 118259
by:

I’ve installed about five different trailer hitches on varying brand and style vehicles. This was by far the easiest install I’ve ever done. Everything fit as it should and the directions were the best I’ve used.



- 118259
by:

Arrived as advertised. Fit perfectly.



- 118259
by:
2015 Cadillac SRX

Very pleased with entire transaction with etrailer. I purchased a trailer hitch & wiring kit for my 2015 Cadillac SRX. Products were excellent and as described. Prompt & free shipping, as well as top-notch install instructions & videos. Keep up the Great work & I'll be recommending etrailer to others.


Comments
Awesome, and no issues to report
Dave - 11/18/2017



- 118259
by:

Very easy to install



- 118259
by:

Was easy to install. Everything fit perfectly. Use it all of the time. Very satisfied customer.



- 118259
by:
2013 Cadillac SRX

Very easy. I read other reviews and installing the harness is important. Total time about 25 min for everything. Took longer to modify the cover than install the hitch and harness. Etrailer was great to do deal with. 5 Stars.


Comments
Did you modify the original fascia to cover the exposed area between remaining fascia?
-- comment by: Fred L - 07/10/2014

Comments
I modifed the optional cover, not the original. Cadillacsoptional cover is made to fit their hitch that is 1 14.The 2 requires cutting access for the reciever to stickthrough. The part number for the optional fascia ts19172271. Hope this helps you.
-- comment by: John G - 07/15/2014


- 118259
by:
2016 Cadillac SRX

Was exactly what I ordered, arrived as promised and snapped into my existing wiring harness without any challenges.....10 minute job!


Comments
Great
Vito - 08/28/2019



- 118259
by:
2011 Cadillac SRX

Purchased both the Class III receiver hitch and T-One wiring harness for a 2011 Cadillac SRX. Both were delivered within five days. I watched the installation video and had both the hitch and wiring harness installed in less than 45 minutes. Great product and a true plug and play product.



- 118259
by:

The original part that I ordered was wrong. So, I replied to an email that I had received from George regarding the purchase. I did not have to call!! Much to my surprise, both Nicole and George with etrailer responded to my email and gave very clear easy directions to return the item to them. I really appreciated their emails to be sure my return and second purchase went smoothly! I will definitely order from this company again!


Comments
Excellent product and customer service!
Andrea J - 08/21/2016



- 118259
by:

No issues, prefect fit



- 118259
by:

It fit perfect on my Cadillac SRX.



- 118259
by:
2010 Cadillac SRX

The wiring connection was perfect for my 2010 Caddy SRX. They described the location of the harness and I simply put them together and everything worked perfectly. What a relief because I thought I was going to wire the connections and doing that may have caused other electrical problems. Many thnaks for your help....Bob G



- 118259
by:
2012 Cadillac SRX

Easy plug and play. Some forums indicate Cadillac only provides the harness on all SRX models up to 2012. Newer models must have the tow package. Mine is a 2012 with no tow package. Make sure you install the harness before installing the hitch. Extremely difficult to plug in the harness afterwards, unless you have very small wrists and hands.



- 118259
by:
2013 Cadillac SRX

Simple plug into existing wiring harness. The vehicle comes prepared to take this (2013 Cadillac SRX). You just remove a protective dummy plug out of the harness and plug this in. Piece of cake. BUT make sure you do the wiring before you install the hitch. Otherwise it's very hard to get to.


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Show More Reviews

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



  • Trailer Hitch and Wiring Recommendation for 2015 Cadillac SRX
    We know that the tow package 4-way kit part # 118259 is the correct fit for your 2015 Cadillac SRX as regardless your vehicle has the correct wiring present. I attached an install video for this on a similar SRX as well. This would work great with the Draw Tite part # 75682 that fits your vehicle as well that you mentioned. This hitch has an easier install and great towing capacities so it's a great choice.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2012 Cadillac SRX
    If you had a factory 4-way that you are looking to replace you would want the Trailer Wiring Harness # 118259 that you referenced, if you do not have a factory 4-way and you are looking to install one you would want a Trailer Wiring Harness # 119147KIT. I attached installation instructions for both products for you to check out also.
    view full answer...
  • What is Towing Capacity of 2013 Cadillac SRX
    I was able to find that your 2013 Cadillac SRX has a towing capacity of 2,500 lbs. The trailer wiring harness part # 118259 that you referenced is also the correct fit for your vehicle as well. For a hitch that would give you your full towing capacity we then have the Draw Tite part # 75682 as a fit. I attached an install video for this hitch for you to check out as well. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball...
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  • Location Of Port On 2012 Cadillac SRX With Factory Tow Package To Install T-One Wiring Harness
    The port that you plug the T-One Vehicle Wiring Harness, part # 118259 into is located behind the rear bumper above the place a hitch would be installed. This harness is designed for vehicles that have a factory tow package. I have attached a link to an installation video for this harness on a 2012 SRX you can check out. At the 10 second mark on the video it shows where you can find the port you need to connect the harness. If you do not have the factory tow package, you will need to...
    view full answer...
  • Why Does Curt Hitch for 2016 Cadillac SRX Have Higher Capacity than Vehicle
    A lot of times our hitch manufacturers rate their hitches for higher towing capacities than what the vehicles they fit have. This is just a way to make sure the hitch never fails. You always have to go by the lowest rated component in a setup for the overall capacity as you are only as strong as your weakest link. The American made Curt hitch part # C13002 that you referenced would be a great choice though. I attached an install video for more info for you to check out as well. Since...
    view full answer...
  • What is Towing Capacity of 2012 Cadillac SRX
    I looked up your 2012 Cadillac SRX and it has a towing capacity of 2,500 lbs so as long as the boat and trailer weigh less than that you'd be fine with this as your tow vehicle. For a trailer hitch the Curt part # C13002 would be a great option with more capacity than you'd need plus a relatively easy install. Then for trailer wiring all you'd need is the # 118259 for an easy install. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It...
    view full answer...
  • How to Determine Towing Capacity for a 2014 Cadillac SRX
    The final authority for tow capacities on a vehicle will be the owners manual. From the research I did on your 2014 Cadillac SRX it looks like the max trailer weight you would want to tow with would be 2,500 lbs. You will still want to confirm this with your owners manual though. If you need a hitch I would recommend the Draw Tite Hitch part # 75682. Our customers have rated this hitch highly. I attached an install video for this hitch for you to check out also. To complete your towing...
    view full answer...
  • Trailer Wiring Recommendation for a 2011 Cadillac SRX
    In order to determine if you can use Tow Ready Wiring Harness, # 118259, or Curt Wiring Harness, # 56096, you will need to check to see if your 2011 Cadillac SRX has the connection point. The connection point is located beneath the rear of the vehicle behind the bumper. I have included a link to the installation instructions that show what you will be looking for. If you find that connector on your SRX, you can use either harness, though the Tow Ready harness is longer. If you do not see...
    view full answer...
  • Recommendation on a Hitch and Motorcycle Carrier for a 2016 Cadillac SRX
    We do carry trailer hitches that will fit your 2016 Cadillac SRX. However, your vehicle does not have a large enough tongue weight rating to be hauled using a hitch mount motorcycle carrier. According to the owner's manual for the 2016 Cadillac SRX, the maximum tongue weight is 250 lbs.Your motorcycle is too large to be carried using a hitch mounted motorcycle carrier. The motorcycle weight of 375 lbs plus the weight of the carrier would be way over the tongue weight limit for your Cadillac....
    view full answer...
  • How Much Can a 2016 Cadillac SRX FWD 3.6L Tow
    The towing capacity of a 2016 Cadillac SRX FWD 3.6L is 2,500 lbs for models without the factory tow package or 3,500 lbs for models with the factory tow package. Adding the towing components aftermarket won't increase towing capacity in their eyes but we do still have everything you need to get setup and I have attached this below. Draw-Tite Max-Frame Trailer Hitch Receiver part # 75682 T-One Vehicle Wiring Harness part # 118259 etrailer Ball Mount Kit part # 989900 Derale Series 8000...
    view full answer...
  • Troubleshooting Tow Ready Custom Fit Vehicle Wiring Harness # 118259 for the 2013 Cadillac SRX
    The TowReady wiring harness for the Cadillac SRX that you referenced, part # 118259, is intended for vehicles that have the factory tow package installed. Thank you for your recent purchase of a hitch and related items along with this wiring harness. The exact components that constitute a factory tow package will vary among auto makers and can also vary among different vehicle models and model years. Sometimes wiring may be put in place at the factory but may not be connected at one or...
    view full answer...
  • Trailer Hitch Recommendation to Tow a 3,000 Pound Pop Up Camper with a 2012 Cadillac SRX
    The Draw-Tite trailer hitch # 75682 has a gross trailer weight capacity of 4,000 pounds so it can more than handle the 3,000 pound gross weight of the trailer you plan on towing. However you will want to look at the vehicle owners manual to determine what the towing capacity of the vehicle is. Whatever is lower, that is the capacity you must go by. Tongue weight is typically 10 to 15 percent of the gross trailer weight. So if the trailer weighs 3,000 pounds that would make the tongue weight...
    view full answer...
  • Recommended Trailer Wiring Harness and Class III Trailer Hitch Receiver on 2011 Cadillac SRX
    If your 2011 Cadillac SRX already has the connector to plug a trailer wiring harness under the rear bumper then all you need for a wiring harness is the Tekonsha Custom Harness # 118259. This plugs directly into the connection and provides you with a 4-way trailer connector that will hang under the Cadillac's rear bumper. We recommend mounting the 4-way, with a mounting bracket, like # 18144. If your Cadillac did not have the connector under the rear bumper you would need the Upgraded...
    view full answer...
  • Best Hitch and Complete Towing Package for 2015 Cadillac SRX AWD
    Congrats on your vehicle purchase! A complete towing package includes a trailer hitch receiver, wiring, a ball mount, pin and clip and a ball. For your 2015 Cadillac SRX AWD I recommend going with the Draw-Tite Max-Frame Trailer Hitch Receiver # 75682. This provides you with a 2 inch receiver which not only accepts a larger variety of accessories over the 1-1/4 option, but it also has a higher towing capacity at 4,000 lbs and 400 tongue weight which is plenty enough for the 2,800 lb trailer...
    view full answer...
    Image 1 for
  • Trailer Wiring Harness Options for a 2013 Cadillac SRX
    The wiring harnesses available for the 2013 Cadillac SRX come in two different styles. Models that came with a factory tow package do have a plug and play style connector such as # 118259 or # 56096. If you are unsure whether or not you have the tow package you can contact the dealer, give them the VIN of the vehicle and they should be able to tell you how it is equipped. The other style is a hardwire harness such as # C59236 or # 119147KIT. Plug and play harnesses are not always available...
    view full answer...
  • Recommended Wiring to add Trailer Brake Controller to 2013 Cadillac SRX
    For your 2013 Cadillac SRX, you will need a brake controller and wiring for a pop-up camper with electric brakes. For this, I recommend the Tekonsha Primus Trailer Brake Controller - 1 to 4 Axles - Proportional # TK90160. This when connected will apply the brakes to your trailer at the same time and with the same intensity as you hit the brake pedal in your SRX. This controller has the manual override lever that allows you to apply just the trailer brakes and has an easy to read LED...
    view full answer...
  • Trailer Hitch and Trailer Wiring Harness Recommended for 2010 Cadillac SRX
    The Curt # C13002 Class III hitch you'd looked at would be a great choice. The hitch offers a 500 lb tongue weight capacity, so as long as the weight of the bike and the carrier you use, such as # e98873 doesn't exceed the tongue weight capacity of the hitch or that of the vehicle itself, the hitch would work well for you. For trailer wiring, you'd use # 119147KIT if the vehicle isn't set up with the factory tow package or # 118259 if it DOES have the tow package. If you're not sure, a...
    view full answer...
  • Recommended Hitch for 2011 Cadillac SRX
    There are Class II and Class III hitches available for your SRX. I'd recommend going with a Class III hitch because it's more common and there's more accessories available for the 2 inch Class III receiver. I'd recommend the Curt Class III, part # C13002. This hitch has a higher capacity than the other hitches, but you might be limited by the towing capacity of your vehicle. Consult your owner's manual for specifics. This hitch is actually the lowest-priced of the Class III options, but...
    view full answer...

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