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  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 # 118520
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Custom Fit Vehicle Wiring

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Tekonsha Trailer Hitch Wiring - 118520
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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 118520 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.
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Tekonsha Custom Fit Vehicle Wiring - 118520

  • 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.


  • 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 trunk
    • 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


  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5.6 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove some interior trim or carpeting to access the 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 within your trunk or 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.

118520 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118520 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 - 118520

Average Customer Rating:  4.6 out of 5 stars   (86 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.


Web site gave excellent description of parts and I googled several u-tube installation video that made installation possible. Installation does require under car access and I was able to achieve this with a simple ramp on the front wheels.


the custom wiring harness for Mazda 5 that I purchased from was a well thought out component which made it easier to install and very dependable. Compared to the standard types, which I have used before, no damage whatsoever is done to the original wiring and OEM connectors are only used. I only had one problem with providing a 12 volt connection in which the instructions required to find a way to get heavy gauge flexible cable from the rear of the minivan to the firewall and into the engine compartment. I could not find existing holes so what I did was modified this part to run cable to fuse box on passenger side and purchase a Twin fuse holder from from Bussmann at an auto parts store for a few dollars and hooked it up to accessories fuse in parallel. Everything worked the first time!


This kit made wiring my Mazda5 a breeze. The equipment is of good quality, the instructions (on paper and online YouTube video) are clear and concise. Everything worked as described. The 4-pole trailer harness tucks nicely in the side storage compartment of my car when not in use (see photo). Excellent!

2012 Mazda CX-9

Wow!!!! I must say the product was excellent and the service was even better. I installed the hitch and did the wiring myself, thanks to all the instructions including videos that were available on the website. Thanks etrailer y'all are awesome!

2012 Mazda CX-9

I received the product undamaged or missing parts. I watched the video online which gave a good overview of the installation. It took a little longer than I thought but it wasn't out an outrageous amount of time (if had did another, I'm sure it would go much faster).
Haven't tried it on a trailer. I did a meter test on the plug and it appears to working. I will be road testing it this weekend.
Only wish the wire length between the tail light connectors was longer. I added some wire so I could run the wires along the harness in the back of the CX9.
Great product, everything you need for the install is there.

The product fit my SUV perfectly. The wiring harness and connectors fit those existing in my SUV.I only use the hitch every now and then, but when I do need to tow a trailer the lighting system works great.
Steve C - 05/08/2015

2012 Mazda CX-9

Great product - gets power to the trailer lights and looks like professional install.
Straight-forward instructions, and the YouTube video makes it particularly easy to follow. Most cumbersome part of the install is feeding the wire to the battery. Couple barriers not mentioned in the instructions/video: 1) subwoofer speaker in trunk floor had to be removed to access driver's side panel, and 2) underbody guard had to be removed to feed wire to front.
All in all, very happy with the product - glad I chose to install it myself with this kit.

Still works great.
Chris S - 09/24/2018

2012 Mazda CX-9

Great product; great service!! Installed the hitch the morning after it arrived. It was every bit as easy to mount as stated in your website. Two days later I installed the trailer wiring harness; while a bit more time consuming the instructions provided are clear and consice.


A tough little hitch assembly.Have used the towing package I installed repeatedly, over the course of the past year, and it has provided yeomans service. Could not have asked for a better value for the money. Thanks
Neil C - 07/09/2014

2011 Mazda CX-9

This product works as advertised. Running a power wire under the vehicle was a pain just using a couple car ramps in the driveway, and the utility trailer I connected needed some work, but now it’s all working great.

Michael Q - 08/15/2019

2012 Mazda CX-9

Installed this product on a 2012 Mazda CX-9. Still not sure about this one. There appears to be a connector that is set up for the trailer in the back of the vehicle, but I installed this anyway. It was a lot of work, but the video on etrailer made it easier. Also, there is already a power outlet (cigarette lighter) in the back, not sure why we have to run it all the way to the battery. Oh well, its done now.

HI Mark:You stated that seemingly there is a connector that is set up for the trailer in the back of the vehicle.Do you know what it looks like?Thanks in advance!Cheers, Jim Liotta
-- comment by: Jim L - 10/17/2012

2009 Mazda CX-9

wire harness for passenger turn signal was very tight needs to be 2-3 inches longer. Driver side was also tight should be made longer as well. The short wires did not allow me to properly place the modual so the adhesive could be properly adhered. It looked to me the adhesive is on the wrong side, if I flip it over the wires would be even more taunt. After going through the trouble of installing this system I was informed of the plug already installed by Mazda all I needed was a short pig tail with the proper plug. No fishing wires!

HI Mike:I just read that you installed the trailer wiring from eTrailer for a CX-9 possibly CX-7 but later on you discovered that all you needed was a short pig tail with the proper plug. Do you know if all CX-9s have this feature and dont need the kit installed? How do I check to see if I dont need to be fishing wires? And, where do I access the electrical point to install the wires of the pig tail? Thanks in advance for your help!Cheers,Jim Liotta
-- comment by: Jim L - 10/17/2012


So glad I bought this…life changer fur me.


First. Everything was in the trailer hitch package that you need. It only took about 1/2hr to install.
2nd. The wiring harness was a little more difficult, because I had to remove the side back panels. The plugs were exactly what was advertise everything fit perfectly. I would recommend this product to anyone. By the way it took about 2hrs to install the wiring. Not hard but teadious. Anyone can do it.

2013 Mazda 5

When they say the kit is complete, they mean it. This outstanding wiring harness made the job easy. The worst part of it was removing the interior panels to get at the tail light wiring. I luckily found a video on YouTube of a guy who did the job before and gave a great narration with the 10-minute long video that gave me the courage to tug hard on the panels to separate the snap connectors. Once I got access to the wiring, the job was simple. The wiring was all cut to length and had factory-grade plug-in connectors that mated with the existing wiring. The instructions that came with the kit were adequate. But I suggest a search for video if you've never taken your interior apart before. One challenge was running a hot wire all the way from the driver-side taillight, to the battery, to power the unit. It's your choice to run it inside the car or under the chassis. I went with the interior. The wiring job took about 2 hours and the finished job looks like a pro did it...and I'm no pro. Highly recommend this kit.

Mazda CX-9

I had two separate orders with eTrailer; 1) tow hitch for a Mazda CX-9, and 2) the trailer wiring package for the same vehicle. The orders were several weeks apart becasue I thought I could find a better price on the wiring kit, which I could not. The service was excellent and I somebody even talked to me on the phone while I was installing the wiring kit. Everything was incredibly easy to install, but I think the wiring kit installation might not be for everybody.

Mazda 5

Overall a good product. The video instructions on etrailer are much better than those included in the kit. Generic for a range of Mazda vehicles. For the Mazda 5 and/or if you have a 12v outlet in the rear area, you can splice into it instead having to run a wire all the way up to the battery, and you can run the trailer pig-tail out one of the spare-wheel well drain plugs by cutting a slot in it and then resealing it. Makes for a completely hidden installation.

2006 Mazda 5

I ordered a hidden hitch trailer hitch receiver and the wiring kit for the trailer lights for my Mazda 5 and was amazed at how easy they were to install. The videos that provides are invaluable and watching them answered all my questions. I will highly recommend to anybody who looking for anything trailer related.

2012 Mazda 5

I didnt want to buy this harness as I didn't want to run a wire all the way to the battery. Well...I did. It works great. All the connections fit well. I fished the power wire through an existing hole below the spare tire. It took me 2 hours to lay under my Mazda5 and tie-wrap it up to the battery. If I would have been able to lift the car like at a shop I would have done it in 10 minutes. Anyway, glad I went with this unit. Lights are nice and bright on the trailer.

2015 Mazda CX-9

Trim removal and T- connector installation was a snap, only took 15 minutes. There are several you tube videos to help through this part. Running the power wire up to the battery takes a little more creativity. Once I mapped out a good route the connection was easy. Had the entire thing installed in under 2 hours

2015 Mazda 5

This product was used for a 2010 Mazda5. The leads for the right tail light connection were a bout 18 inches too short. I had to splice in an extension to connect it to the right assembly. The connectors for the Mazda tail light harness were correct and everything else was OK. The barrel connectors to splice the wires required a crimping tool - not something I have had since the days I was worked as an electronics technician. The instructions for routing the 12VDC lead to the battery were a bit sparse. I did locate a drain grommet in the bottom of the spare tire well that can be used to wire under the body. Over all took about three hours, including the extensions of the right side wires (and finding hook up wire for the job). The quality looked OK. I'll use it to connect to a small trailer for general use.

2012 Mazda CX-9

For a 2012 Mazda CX-9, I bought the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" - 75531 and the wiring harness T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118520

These items were exactly as advertised. Everything lined up and bolted in perfectly, and it was shipped very fast and FREE. I read someone having to remove the heat shield from the muffler, but I did not have to. Just rotate the aft part of the receiver hitch down toward the ground and fish the mount ends up vertically behind both heat shields, rotating as you go and it slips right in above both heat shields with plenty of clearance. In addition to removing the spare tire (as described), I also had to remove the spare tire cable assembly to give enough clearance for the torque wrench on the passenger side, but it was easy to remove and reinstall. With a box end wrench, you would not need to remove it, but my torque wrench is for use with a socket and I needed the extra clearance. The whole thing only took about a half hour to install. I connected the wiring kit to both light socket connectors, but still have to wire the ground and positive leads. The wires are plenty long, unlike other reports I read. Not a lot of extra length, but enough to reach both light sockets with slack to tuck it away and secure it under the molding. Clean and easy install.


The direct fit wire harness is GREAT. fast installation and is pretty much hidden. I have the trailer wires tucked in the side along with the jack so you don't even know its there until you need to use it. Highly recommended over universal fit, will save you a lot of time and headache. Comes with instruction but Etrailer has a video on the website that makes it that much easier.

2011 Mazda CX-9

Kit came with all necessary supplies. Wiring was good quality, connectors were a perfect fit with those on my SUV. I watched installation video on meant I didn't even need to read the instructions--a great resource. Very please with this wiring harness.

2012 Mazda CX-9

I loved the Hidden Hitch I purchased for my Mazda CX-9, a breeze to install. I also ordered the wiring harness, but I am not a far of cutting and splicing on a new car. I think I'll order the Mazda wiring harness and return the 1 I got from ETrailer. Overall 100% satisfied with the customer service and delivery of my order.

2010 Mazda 5

The wiring took much longer than the hitch installation. I liked the videos describing the installation, but I used both the 2012 & 2010 (I have a 2011) videos because they each had their own tips and different shots. The wiring connecting the two T-connectors could have been longer (they even mention it in the video). Also, snaking the black wire from the back to the front of the car underneath wasn't very easy. All in all though, it was worth it to get the wiring and save the money by doing it myself.


Works great ! I wasn't fond of running a power wire all the way to the battery from the back of the car but in the end, I got it done. This install was easier to do on a car hoist. I couldn't imagine trying to install the power line by use of an automotive creeper and squeezing under the car. Thanks for all the videos on the install. Saved me a lot of time and effort.

Show More Reviews

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

  • Can You Tie Into the Rear Aux Port For Power When Installing Trailer Harness On a 2007 Mazda 5
    The T-One Vehicle Wiring Harness part # 118520 is indeed an excellent option for a 2007 Mazda 5 and rather simple to install or at least straight forward. As mentioned, you need to run the power wire up to the battery. This question gets asked a lot but I can't recommend using the rear auxiliary port as it may not be rated for the amp draw of the harness and sorta defeats the purpose of being a powered kit as you are now relying on the factory wiring so if an issue were to occur you risk...
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  • No Trailer Lights After Installing a Trailer Wiring Harness on a 2008 Mazda CX-9
    If you have the trailer wiring harness # 118520 installed according to the instructions and it is not showing power coming out of the converter box then that indicates that the converter is bad and needs to be replaced. Since this converter gets power for the trailer lights from a direct connection to the battery, if that connection is not made then the converter will not work. I have included some links that might help you.
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  • Why Does Trailer Wiring Harness Need to be Connected to Battery on a 2010 Mazda CX-9
    Trailer wiring harness # 118520 for the 2010 Mazda CX-9 is a powered converter. This means it requires a direct connection to the vehicle battery to power the trailer lights. The T-connectors provide the proper signals to the converter and trailer lights. The powered converter is required in order to protect the sensitive wiring on the vehicle. If there were a short it would blow the fuse or converter and not damage the vehicle electronics. The harness will not work unless it is connected...
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  • Does Tow Ready T-One Connector # 118520 On A 2008 Mazda CX-9 Have A Constant Current
    The Tow Ready T-One Connector # 118520 for your 2008 Mazda CX-9 will have a constant supply of power whether the vehicle is running or not since it is connected directly to the battery. However, it will not cause a drain on the battery because the trailer wiring circuits are not active when not in use. For example, the only time a draw is placed on the power wire is when the stop, turn, or taillight circuit on the vehicle is activated and the lights on the trailer are drawing amperage. I...
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  • Power Wire on T-One Wiring Harness # 118520 Needs to be Connected to Battery on 2009 Mazda CX-9
    The T-One Vehicle Wiring Harness with 4 Pole Trailer Connector, # 118520, requires a direct connection to the battery. This connection provides the power to the trailer lights while the other connections provide only the signals. This will protect your vehicles sensitive wiring. Without the connection to the battery, the trailer lights will not work. This harness has a 4-Way connector which only provides the trailer with right/left turn signals, brake lights, and running lights. To connect...
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  • What is the Towing Prep Package on a 2010 Mazda CX-9 and Does it Include Trailer Wiring
    I did a little research and found that the towing package for the 2010 Mazda CX-9 includes: 1. A heavy duty transmission oil cooler and radiator fan 2. A revised engine control module (probably means that the computer has been programmed to be more effective when towing) 3. And a 3,500 pound towing capacity The package does not include a wiring harness for towing. To add one, you will need the Tow Ready Custom Fit Vehicle Wiring, # 118520, that you have referenced. This will add a 4-Way...
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  • Best Way to Run Power Wire To Install Tow Ready T-One Vehicle Wiring Harness on 2007 Mazda CX-9
    To complete the installation of T-One Vehicle Wiring Harness, part # 118520, there is normally a grommet located close to the installation point that can be used, it is normally at the bottom of trunk cargo area. You would want to cut a small slit in the grommet, feed the wire through and seal the cut you made in grommet with silicone. We do not have specific information for your vehicle as to the location of the grommet. If you find it easier you could run the wire through the interior...
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  • How Do I Run the Battery Lead of My T-One Wiring Harness # 118520 on my 2011 Mazda CX-9
    I can describe to you how to run the battery lead on this T-One Vehicle Wiring Harness, part # 118520, but at this time we do not have a video to show you how to do it. Usually in the floor boards of vehicles there are holes that have rubber grommets in them that you could run wires through. Try looking in the threshold, trunk floor panels and trays or pulling back some of the carpet and looking for a black, circular rubber grommet. You should be able to use a razor or x-acto knife to...
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  • Options for Running the Power Wire for the Tow Ready Custom Fit Wiring # 118520 on a 2011 Mazda CX9
    The best way to run the power wire for this Tow Ready Custom Fit Vehicle Wiring, part # 118520, on your 2011 Mazda CX9 would be to run the wire through either a grommet in the trunk area to the exterior of your vehicle and then along a frame rail avoiding moving and hot parts to prevent cutting or melting the wire. Usually if you look under the carpet that is in the trunk area you will see small black, circular rubber grommets that you can use as access points to the exterior of your CX9. Or...
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  • How Difficult is Trailer Harness Installation on a 2008 Mazda CX-9
    We do have a video of a similar product on a 2010 Mazda CX-7. I have linked to it below. It is a bit easier than the install on a 2008 CX-9. For your vehicle, You would need to connect to both the driver and passenger side tail light. You would attach one wire to the body of the car as a ground and you would run one more wire up to the battery for power. I have also included a link to the directions for the harness for your 2008 CX-9 that describe in detail, with pictures, the installation...
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  • Why Does T-One Wiring Harness 118520 Require a Power Wire
    The 2007 through 2010 Mazda CX-9 models require that the # 118520 wiring harness have a power lead wire installed, so you will definitely need to install this wire to equip your vehicle for towing and to ensure that the harness functions correctly. The power lead wire prevents the trailer from pulling power directly from the vehicle tail light circuits, and protects the vehicle wiring system from overload. The tail light functions come from the taillight itself, but the power comes from...
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  • How to Install T-One Vehicle Wiring Harness # 118520 on a 2010 Mazda CX-9
    The installation of wiring harness # 118520 would go the same on your 2010 Mazda CX-9 as it would on the 2007 through 2009 models. You will definitely need to run the power lead wire to the positive battery terminal on the vehicle, to prevent your trailer from pulling power directly from the tail light circuits. This will protect your vehicle wiring system from overload. The installation is fairly straight forward once you have gained access to the tail light connectors on either side...
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  • Parts Needed to Add 7-Way Trailer Wiring Connector to 2015 Mazda 5
    You will need to start with a 4-way (if you do not have one). For that you would want the # 118520. Now since your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way.
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  • Best Trailer Wiring Harness for a 2014 Mazda CX-9 with Factory Tow Package
    I do have an option for you but the T-One Vehicle Wiring Harness for Factory Tow Package part # 118278 is not a confirmed fit for your 2014 Mazda CX-9. Instead, you will want to use the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118520 which fits models both with and without the factory tow package. The wiring harness that you originally asked about is only a confirmed fit for a Mazda CX-9 from 2016-2018 and will not work on your 2014. I have also attached an...
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  • Trailer Hitch and Wiring Recommendation for 2012 Mazda CX-9
    Since your 2012 Mazda CX-9 did not come with a trailer hitch that would indicate it does not have the tow package. Also the fact that you don't have trailer wiring is evidence of this as well. So you'd want the Tekonsha kit part # 118520 which is a confirmed fit and will work well. For a trailer hitch I'd recommend the Draw Tite part # 75531 which is a 2 inch trailer hitch which would not ever require a stabilizer strap with a non-supported load like a bike rack like the Curt hitch does.
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  • How Would a 4-way to 5-way adapter like part # 20036 Install a 2008 Mazda CX-9
    Normally you could use a fuse tap and tap into the reverse light circuit to get the signal needed to install a 4-way to 5-way adapter like part # 20036 on your 2008 Mazda CX-9. If you can access the wiring directly behind the reverse light (like if you were going to change out a bulb) then you could get it there. I attached a typical install video for this part for you to check out also.
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  • 2010 Mazda CX9 Wiring Harness Tow Ready # 118520 Versus Curt # 56016 for 2010 Mazda CX-9
    Both vehicle wiring harnesses are pretty similar, but if I had to choose between the two, I would choose the Curt # 56016. The Curt converter box has a slightly higher amperage capacity, is a bit less expensive and uses a superior method of constructing the electronic circuits in the converter box. The Curt box uses what they refer to as Surface Mount Technology, where the components are soldered directly to the circuit board, rather than through holes in the board. This typically results...
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  • How to Wire in an Adapter 4 Pole to 5 Pole Adapter # 47515 For a Reverse Lockout
    The wire you are going to be looking for to activate the reverse lockout feature for your surge brakes will be the wire that powers the reverse light bulbs. I would recommend you use a circuit tester # 3808 to determine which wire has power when the reverse lights are illuminated and no voltage when the lights are not activated and then use a quick splice Connector # 804C to tap into this circuit and run wire from the quick splice to the 5-way. I attached a review video for a Adapter 4...
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  • Trailer Wiring Recommendation for a 2007 Mazda 5
    I am not sure why they told you they could not install trailer wiring on your 2007 Mazda 5. We list the CURT wiring harness # 56016 as the correct kit for your vehicle or Tow Ready Harness # 118520 that you have referenced. Installation is not difficult for either harness. The main connection points will be located behind each tail light and there is a power wire that will need to be connected to the vehicle battery to provide power to the trailer lights. It also protects the vehicle...
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  • Troubleshooting Running Light Circuit on Wiring for 2011 Mazda CX 9 Trailer Harness
    The most common cause for some trailer light functions to operate while others do not is a bad ground connection at either the vehicle wiring harness or the trailer-side wiring. This can happen because a weak ground will still allow some current to pass through - say enough for brake lights and turn signals that are not on all the time - but not for other functions like the running lights and license plate light that ARE on continuously. Check that the white ground wire's ring terminal...
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  • Recommended Wiring Harness for 2015 Mazda CX-9 With Factory Towing Prep Package
    The Curt T-Connector Vehicle Wiring Harness # 56016 that you referenced is intended for the Mazda CX-9 without the factory tow prep package, as you noted. Right now the aftermarket makers of wiring harnesses, like Curt and Tow Ready, do not offer a kit for the 2015 CX-9 that has the factory tow prep. You can still use one of the aftermarket 4-pole wiring harnesses such as Curt # 56016 or Tow Ready # 118520 if you prefer. These may well be less costly than an OEM wiring kit and if all...
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  • Weight Capacity and Warranty Restrictions for Installing Draw Tite Trailer Hitch 24773 on a Mazda 5
    The # 24773 hitch is rated to tow up to 2000 pounds, but this does not necessarily mean your 2009 Mazda 5 is capable of towing this much. You can normally find the vehicle tow capacity in your manual. Installing an aftermarket hitch does sometimes void vehicle warranties, but this would be something you would need to discuss with your dealer. I would recommend using a rust proofing spray or undercoating for the hitch installation. This can be found at your local hardware store. The...
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  • Can I Install a Trailer Wiring Harness on a 2010 Mazda CX-9
    Your 2010 Mazda CX-9 does have trailer wiring available to install that will allow you to power the lights on a trailer. I recommend using the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118520, which is an easy plug and play installation with the plugs available behind the trim panels in the cargo area. If you also need a hitch for your CX-9, the Curt # 13575 is a great choice that will give you a 2" receiver that's well suited for towing. Curt hitches are known...
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  • Trailer Hitch and Wiring for a 2010 Mazda CX-9
    Curt trailer hitch # 13575 is indeed listed as a fit for the 2010 Mazda CX-9 models. I have linked a video showing an example installation for you. 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 or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not have the right rise or drop...
    view full answer...

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