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Acura MDX Trailer Wiring

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Acura MDX Trailer Wiring Harness

Make installing a trailer wiring harness on your Acura MDX as easy as possible with a custom fit wiring harness from Draw-Tite, Curt, Pollak, Tow Ready, Bosal, or Hopkins. A custom kit will eliminate or reduce the need to cut and splice wires in your Acura MDX while helping to protect sensitive electronics.




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Acura MDX Custom Fit Vehicle Wiring Videos

Trailer Wiring Harness Installation - 2010 Acura MDX

Today, on our 2010 Acura MDX, we will be installing the Curt Wiring Harness, Part Number C56038. First thing we'll start with is opening up the hatch and gaining access to the back of the vehicle. We'll want to go ahead and move this weather cover out of the way, and get into our storage compartment. With that out of the way, we'll pop this threshold trim off. Remove the jack cover. Remove this cover, right here, which houses a lot of our electrical connections. It just takes a screw driver, and pop the top off, and slides up and out.



Trailer Wiring Harness Installation - 2005 Acura MDX

Today, on our 2005 Acura MDX, well be installing the Tow Ready T-One Vehicle Wiring Harness with 4-Pole Flat Connector, Part Number 118336.To begin our install, well first open up the rear hatch door and then the rear cargo compartment. Next, well need to remove the two push pin fasteners and secure the rear threshold. Using a flat blade screwdriver or an interior trim panel tool, well get underneath the fastener and just pry it out removing it from its position.Well go ahead and take our trim panel tool or flat blade screwdriver and underneath the threshold and release the fasteners underneath. Once we release these fasteners, well go ahead and pull up on the threshold and remove it.Now, with the threshold out of the way, we can see the manufacturers tool port. To access the tool port, well press on the locking tab and remove it from the cap. Next we can go ahead and remove the cap from its push pin fastened position.



Trailer Wiring Harness Installation - 2012 Acura MDX

Today, on this 2012 Acura MDX were going to install part number 118424 from Tow Ready.To start off our install were going to open up the vehicles tailgate. On our driver side, well remove the access door. Then, well remove the thresh hold, then the jack storage door. Then, well pull back on the liner on the floor. Well route the T1 connector underneath the carpet and into the block.Now, our T1 harness will plug into the junction box right here. Next, we will locate the ground screw, back by our thresh hold.



Trailer Wiring Harness Installation - 2007 Acura MDX

Today in this 2007 Acura MDX, we're going to install a Tow Ready T-One Connector, product number 118424. First, we need to access the rear cargo area of the vehicle then we're going to need to remove the threshold, the jack storage compartment, and the side panel access door. When we get underneath the threshold and gently pry it free from its fasteners into the sheet metal. The closer you can get your pry tool to the actual fasteners, the easier it will be. With my threshold loose, I'm going to go ahead and set it aside. Now, I've got two screws here at the hinge point from the door.



Trailer Wiring Harness Installation - 2003 Acura MDX

On this 2003 Acura MDX we are going to be installing wiring harness part number 118336. We are in the cargo area of our MDX. We want to go ahead and locate the port that we are going to be plugging our wiring harness into. The wiring harness located inside of the cargo area here is actually right beneath this metal threshold piece here. So, we need to remove a few things to gain access to it. We are going to start by doing that. Next we will remove the middle threshold piece. If you come to the forward side of the threshold piece here, you will see that there are two black push pins that are holding it on this facing. So to remove those, we are going to be using a basic rivet removal tool. And what you are going to want to do is just slide it under the outer ring of the fastener. You take and just pop that right out. And then you will want to move to the topside of the threshold piece and there again are unexposed fasteners just like those that were on the front facing. So we will take the same rivet tool and go ahead and pry it underneath there and pop those out as well. 0:58



Trailer Wiring Harness Installation - 2010 Acura MDX

Today on this 2010 Acura MDX we are going to install part number 118424. The first thing we need to do is open up the back tail gate to get to the interior components of the vehicle, because we have to remove a few panels. First off we are going to open up this hatch right here and remove it. Then we will take out the cover for our jack storage compartment. Then we will remove our threshold right here . The reason we are moving all these pieces is because we need access to run our wires from the court, out to where we can use it. :27



Trailer Wiring Harness Installation - 2004 Acura MDX

Today on this 2004 Acura MDX we are going to be installing wiring harness part number 118336. We are in the rear cargo area of the MDX and we want to locate the port that we are going to plugging our wiring harness into. It is located right behind the rear threshold almost on the driver side. To gain access to it we are going to remove a few things. We need to first remove the floor covering. Remove the two headrests as well. Next the rear threshold piece needs to come off. There are two inside fasteners that are holding it into position and to remove those I am just going to use a rivet removal tool. Get that in there and just pull it away. If you do not have one of these you can just use a flat head screw driver. 00:38





Acura MDX Custom Fit Vehicle Wiring Questions and Answers


  • Locating Reverse Light Wire to Install 4-Way to 5-Way Adapter on 2010 Acura MDX
  • It looks like the reverse lights themselves are on the hatch of your 2010 Acura MDX. You should be able to access a reverse light wire either directly behind one of the lights provided there is a way to access the backs of the assemblies. You will likely have to remove a panel to do so. The other option is to locate where the wiring exits the hatch to go into the vehicle. It is likely at the top of the hatch. You would have to cut away the sheathing to the wires and use a circuit tester,...
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  • Is the Dealer Acura Relay Required to Install Trailer Wiring Harness on a 2014 Acura MDX
  • If your 2014 Acura MDX did not come with the factory tow package then you would likely need to get the relay from an Acura dealer to install trailer wiring harness # C56192. It is possible though that an auto parts store would have an aftermarket relay. You can check your vehicle owners manual for the relay location to see if it is present on your model.
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  • Are Additional Relays Needed to Install Trailer Wiring Harness 119190 on a 2014 Acura MDX
  • The note you mentioned about possibly needing a relay should not apply to wiring harness # 119190KIT on your 2014 Acura MDX. This is because the harness does not use any of the factory installed tow package wiring connections. The # 119190KIT harness gets the signals it needs from splicing into the vehicle tail light wiring and from the connection to the vehicle battery. No additional relays are needed. The instructions are linked on the product page, and on this page, on the right hand side.
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  • Trailer Wiring Harness Installation on 2004 Acura MDX
  • We offer three choices in a custom-fit (no-splicing) trailer wiring harness for your 2004 Acura MDX. All can be seen on the link provided, including the one I suggest, Tow Ready # 118336. Each one includes a powered tail light converter box that generates the lighting signals for your trailer. These boxes are not designed to be exposed to the elements, but instead are intended to remain inside the vehicle where they are protected. However, you may be able to find a wiring grommet...
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  • Tow Ready 4-Pole Wiring Harness # 119190KIT Installation Video for 2014 Acura MDX
  • The recommended wiring harness for your 2014 Acura MDX is the Tow Ready # 119190KIT. This kit includes a powered converter, connectors, fuse holder and a circuit tester, which is the best way to identify the functions carried on each of the vehicle wires. Although we do not have a video showing installation of this particular item in your particular vehicle, the overall process will be the same as that shown in the two linked videos. The process in general consists of locating and testing...
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  • Is a Relay Required to Activate Trailer Wiring Harness # 118424 on a 2010 Acura MDX
  • Tow Ready trailer wiring harness # 118424 is a fit for your 2010 Acura MDX. You will need to make sure that the white ground wire is attached to a clean and corrosion free bare metal surface. A weak ground connection could be the cause of the problem. It is also possible that you will need a relay. Most of the vehicles that use this harness have the relay but if yours is missing the harness will not be fully functional. You can check to see if yours is present by finding its location...
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  • Is There a Wire that Runs to the Vehicle Battery to Install the Curt Wiring Harness # C56190
  • Yes, there is a wire from the Curt Wiring Connector part # C56190 that will need to be run to the positive terminal of your vehicle battery on your 2014 Acura MDX. This doing this protects the delicate taillight circuits of your vehicle. Instead of powering the trailer taillights with your vehicle taillight circuits, this unit will pull all the amperage needed from your vehicle battery and will only use your vehicle taillight circuits as signal wire. I attached an FAQ article on routing...
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  • Parts Needed to Add a Trailer Brake Controller to a 2003 Acura MDX
  • The 2003 Acura MDX is not per-wired for a brake controller so you will need a few things in order to install a brake controller starting with a 4- to 7-Way installation kit # ETBC7. This will provide the 7-Way and the wiring and accessories to install the brake controller. I have included some links that explain the ETBC7 installation for you. For a brake controller, I recommend the P2, # 90885. This controller is very popular because it is reliable, easy to set up, and easy to use.
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  • Trailer Lights Not Functioning if 2013 Acura MDX Key is not in On Position or Running
  • The Draw-Tite T-One Vehicle Wiring Harness with 4-pole flat trailer connector # 118424 plugs directly into the vehicle established wiring harness using the T-one style connection at the fuse box located in the cargo area at the rear of the vehicle. The issue that you are experiencing with the trailer lights not working when the vehicle ignition off or the key in the off position is attributed to the vehicle wiring. It is most likely a function of how the vehilce itself is wired, and does...
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  • Compatibility of Curt T-Connector for 2006 Acura MDX with Wishbone Trailer Connector on Trailer
  • If your trailer uses a 4-pin connector that has five wires leading to it, your trailer uses what is called a wishbone harness. The running light circuit separates at the connector (rather than separating further down the line) with one leg running down each side of the trailer. The Curt T-Connector # C55336 for the Acura MDX will work great with this type of trailer connector, as long as it is indeed a 4-pin connector. No adapter will be necessary. I have linked you to the installation...
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  • How to Tap Into the Reverse Light Circuit of a 2007 Acura MDX for Installing a 5-Way
  • If you open the liftgate of your 2007 Acura MDX you should see a black section of conduit that holds wires that will run from the threshold of the door to the door itself. In that bundle of wires should be a reverse light circuit. What you could do is remove the interior panel behind the threshold where the harness goes and test the wires to find which one is the reverse light circuit. You will need to use a circuit tester like our part # 40376. Aside from that you could try tapping...
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  • Trailer Lights Work then Shut Off Using Wiring Harness 118424 on a 2012 Acura MDX
  • You should not require additional fuses or relays to install the trailer wiring harness # 118424 unless those items are missing on your 2012 Acura MDX. In some cases, there is a relay needed that can only be obtained at an Acura dealer. Consult the vehicle owners manual for the locations of any fuses or relays related to the trailer wiring to check them. The fact that it worked at first then stopped tells me that it could still be a ground issue. You can try moving the converter ground...
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  • What is Purpose of Converter Box On Tow Ready T-One Wiring Harness # 118336 For 2004 Acura MDX
  • The black converter box on Tow Ready T-One Wiring Harness, part # 118336, is for use with vehicles, like your 2004 Acura MDX that have separate turn and brake light wires. Some vehicles send only one signal per wire, creating what is called a 3-wire system: one wire for the left turn, one wire for the right turn, and one wire for the brake signal (common on vehicles with amber turn signals). A converter will reduce it to a standard 2-wire system needed for wiring a trailer. There are still...
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  • How To Connect a 5-Way Trailer Connector To a 4-Way Vehicle Connector on a 2007 Acura MDX
  • You are correct, the 5th pin on the 5-pin connector is to provide the reverse lockout feature for surge brakes on the trailer. It will have to tap into the reverse light circuit of your vehicle to operate properly. We have a part that is designed just for that purpose. It is the Tow Ready 4 Pole to 5 Pole Wiring Adapter, part # 20036. This adapter will plug into the 4-Way connector on your 2007 Acura MDX and the extra blue wire would be spliced into the reverse light circuit on your...
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  • Trailer Wiring Harnesses for a 2012 Acura MDX
  • Yes, we do have the Tow Ready trailer wiring harness, # 118424, listed as a fit for a 2012 Acura MDX. You can also use Curt wiring harness # C56038. I have included a link to the installation instructions and a video showing a typical installation of the Tow Ready harness for you.
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  • Do I Need to Add Fuses to my 2007 Acura MDX When I Install a Trailer Wire Harness, Part # 118424
  • When you are installing a T-One Vehicle Wiring Harness with 4 Pole Trailer Connector, part # 118424, you will not need to install any fuses into your 2007 Acura MDX. I have included instructions and an installation video linked below.
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  • Is Custom 4-Way Trailer Wiring Harness 118424 Better than Curt Wiring Harness 56038 for an Acura MDX
  • Both the Tow Ready wiring # 118424 and Curt wiring # C56038 are correct fits for the Acura MDX, but the # 118424 is a confirmed fit for more model years. The # 118424 will fit 2007 through 2010 MDX models, while the # C56038 is only confirmed to fit 2007 through 2008 models. Both wiring harnesses plug in at the same factory port, as they are both custom fit for the vehicle, and both feature a powered converter to protect the MDX electrical system. I have included links to an installation...
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  • Will the Curt Powered Trailer Wiring Converter with SMT # 56146 work on a 2010 Acura MDX
  • The Curt Circuit Protected Powered Converter w/ SMT, item # 56146, is compatible with your 2010 Acura MDX. The harness is spliced into the vehicle wiring behind the rear taillights and the converter is stuck to a clean area near the tail light assembly. The trailer connector is then stored in any convenient and out of the way area until needed. A link to instructions is provided below. A mounting bracket, item # 18144, can be used if the trailer connector is routed outside of the vehicle...
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  • Trailer Wiring Harness Port Location on a 2004 Acura MDX
  • It should be under the threshold molding on the back edge of the cargo area, along where the door seals to the vehicle. It would not be behind the panel on the left or right side of the cargo area. I have added a link to the instructions for part # 118336. See page 4, it is the page that has the pictures for install 2001-current Acura MDX.
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