Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.
Once installation is complete, the 4-way 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 plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.
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 the trailer. This converter combines 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.
Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.
Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.
Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.
Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on our 2012 Kia Sorento, we will be installing the Curt T-Connector Vehicle Wiring Harness, part number C56163. We'll start our installation by gaining access to the back of the vehicle. Then we will need to remove both tail lights by removing the two screws that hold them in place. With the screws removed, we can remove the tail light. Just pulled the tail light straight back toward us, being careful not to break the alignment tabs. We can then disconnect the factory wiring harness from the tail lamp. Then we will set the tail light to decide. With the driver side done, we can now go to the passenger side of the vehicle and repeat that process. With The taillights out of the way, we now need to run the wires for our new wiring harness.
This is the T connector for the drivers side of the vehicle. It has the red, white, yellow, and brown wires. We are going to pull this up from the bottom of the vehicle into the tail light cavity. To do that, we are going to take an old piece of airline tubing and just feed it down underneath the car between the bumper and the rear quarter panel where the tail light sits. You do not have to use airline tubing to fish the wire up. You can use an old piece of stiff wire, or whatever you may have laying around the garage. With our guide wire now in place, we will take the harness T connector that we are running up to the tail light, we will take it onto our guide wire and pull it up. We'll just take our new wiring harness and plug it in to the factory wiring harness.
We will then take the white wire with the ring terminal, which is our ground. We will take the self-tapping screw that came with the kit, we'll then find a metal surface to drill into that will still allow us to have clearance for the tail light, and this will be our grounding point. We'll then proceed to the passenger side of the vehicle and route the wire down like we did on the driver side to pull up the other wire connector. We will then take our other T connector for the passenger side, which is the green and white wire, and we will route it over there. We will go behind the rear bumper support, and up and over the exhaust. We want to make sure we stay as far away from the exhaust as possible. With the wire ran across the rear bumper, we will tape it onto our wire guide and pull it back up the vehicle. With the wire pulled up on the passenger side, we'll go ahead and take our T connector and plug it in to the vehicles factory wiring. Now, with the wires ran for the taillights we'll go ahead and just plug the other side of our T harness into the connector on the tail light. Then we can go ahead and place the tail lights back on to the vehicle. We can move back underneath of the vehicle, we'll find a piece of sheet metal on the vehicle to mount our control box to. To do that, we will use the double-sided adhesive that came with it and just mount in place. We will then take our four pole connector, run it up under the bumper mounting tabs where we pulled our green wire through.
With wire ran, we will secure some of the slack in the wire with a zip tie. To keep the wiring up off the ground, and onto the hitch, we will take the For the four way connector, install it onto the plug, and loop the through the hitch. We can now take the black power wire that came with the kit, strip the end of it, place it into a wire connector, then we will crimp the connection. We will then take the other end, of the wire connector that we crimped our power wire on to, and then connect that to the bare wire on the converter box that we mounted previously. We will then run that wire to the front of the vehicle and that will be the connection for our battery. We will also wrap our connection with a little electrical tape for a little added security, and to help keep road debris and water out. We ran our 12 volt wire along the frame. We tried to stay as close to some of the factory wiring as possible, and made sure to come up and over the suspension to keep it from getting pinched. Along with some of our brake lines, the filler tube for the fuel tank, and all the way down the frame rail, staying close to those factory brake lines. With that black wire that leads to the battery ran underneath the car, we use that airline tubing that we used earlier, push down through the engine bay, attached to the wire, and pull it up. We want to make sure that we avoid any moving parts, or anything that might get hot and damage the wire. With the wire pulled into place, we need to cut it to length.
We're going to splice in a fuse holder, which we will connect to the battery. We'll add the connector to the end of the power wire that we pulled up, and crimp a connector onto the end of it. We will then take one end of our fuse holder, the other end of the wire connector, and make that connection. We can then take our ring terminal and place it on the other end of the fuse holder. For a little added security we'll add some electrical tape over our connections. Now we make our connection to the battery. Take our ring terminal. With the connection made, we can now insert the 10 amp fuse. We can then take some zip ties and clean up the excess wiring. We will take our ground clamp, connect it to the exposed terminal, which is for the ground. We will check the running lights, the left turn signal, the right turn signal, and the brakes. We're ready to hit the road. That's going to conclude today's installation of the Curt T Connector Vehicle Wiring Harness, part number C56163 one hour 2012 Kia Sorento. .
Average Customer Rating: 4.8 out of 5 stars (31 Customer Reviews)Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
by: Thomas W.04/07/2013
I gave this Curt wiring harness an excellent rating even though the initial one I received didn't work! That is because of the EXCELLENT customer service I received from Curt when I called. They offered to immediately send me a replacement at no charge, which arrived in two days. I put it in today and it's fine. Tomorrow I will call them as they asked me to and they will arrange with UPS to pick up the old one for analysis. How many companies do you know that would do this???? Most will tell you to pay to ship it back and when they receive the old one, they will send you a replacement in their own sweet time. Curt ranks #1 in my book for customer service and I would not consider buying from anyone else now! One thing to Sedona owners that isn't the fault of Curt. Don't think you're going to install this kit without a fish tape to rout the wires from inside the taillight area and down to the back of the bumper. It is IMPOSSIBLE without a tape or flexible wire. You also have to run a heavy gauge wire (supplied) from the engine compartment to the left tail light area to power the conversion box. Things are not as simple as in the old days of just spicing into existing wires. 74679
Everything worked great. Used a 4' long fiberglass rod to push up From the bottoming thru the left taillight attached the wiring of the rt taillight and pulled thru the small hole. Then passed the free end of pole up thru the right taillight and the hard part was done. Thank u Dana 71899
by: Jeff L05/09/2014
This item was priced fairly and was shipped with an upgraded shipping to express and arrived 3 days after order was placed. Very nice of etrailer to do that. This is a quality wiring harness with good instructions and wiring schematic drawing. Everything is included including tie straps. 129703
by: Amy O09/20/2013
It definately had to be connected to the battery which was a pain having to run the wires to the front of the car from the back of the car. I thought it was just as simple as plugging it into the connector in the tail light. 100734
by: Steve M.03/19/2014
I ordered the Curt hitch and wiring kit for my 2012 (4 cyl.) Kia Sorento. Mounting to the car went smoothly and wasn’t difficult thanks in part to watching the videos. I had a friend help which was nice, especially putting the hitch up in place. The products did just what they claimed to do and were cheaper than that other big orange and white place. I like how well Curt hides most of the hitch from view. A special treat was getting up graded to priority shipping (without my request) and receiving everything in about 2 ½ days. Win/win! 121334
by: George M.05/23/2015
Overall fit and finish is excellent. I installed the wiring kit on my 2011 Sorento. The instructions that come with the kit are basic. Watching the video on etrailers webpage explains everything perfectly. The one issue I did have is that the lenght of the cable from the T connector on the drivers side was not long enough to mount the relay box anywhere near where the video shows it. I ended up making the setup work, but it would have been much easier if the wires were a foot longer. Otherwise I am satisfied so far. 195220
It works okay for now. This is 3rd one I installed since May as first two failed after a few uses. The first one was covered and replaced for nothing. The first two were hard wired style. 3rd one is the new plug in style I only hope the new style ones are going to last. I would have thought curt would of replaced the second one also. I ended up playing for price for two. These were in installed on a 2013 KIA Sorento. 147958
The wiring harness was easy to attach. Everything I needed to get the 4-Way flat wire connector in place was included. I have ordered another wiring kit that will allow me to convert to 7-way RV connector with an electric brake controller. I'll soon be ready to tow my Aliner Sport pop-up trailer. 74508
by: Paul O.09/01/2013
This product is amazing. I recently had trailer wiring installed by Uhaul, and it did not work properly. Even though I purchased the 2yr wiring plan I decided against driving the 45 minutes to have them try and fix it for hours. I purchased this product and had it installed, tested, and completed in about 30 minutes. Everything works great. 97799
This product was fairly easy to install and worked like a charm the first time. The hardest part was running the wire from the converter to the battery. I actually ran it from the battery to the converter because it was easier to drop the wire down through a gap behind the engine. 89327
by: Heath B.06/01/2014
This product was fairly easy to install. The hardest part is routing the power wire from the taillights to the battery. The part takes about 20 minutes if the car isn't on a lift. Otherwise no problems! 133615
I just put in the trailer hitch and wiring harness which fit perfect. I am 70 years old and completed the job in about 4 hours by myself. Great product and good instructions. Thanks to all. 80883
by: Fred M05/15/2013
Very easy to install took about 15 min. Ricky from etrailer helped me when I placed my order and he was awesome and answered all of my questions I would do business again. 80349
by: Don R09/26/2014
This was so easy to install I started to redo it just to make sure. It took less then 30 minutes once I put the truck on a set of ramps, and it has worked perfectly. 153272
by: Joe G04/23/2015
Service was great. Timely delivery. I hope the wiring harness works for more than a year. I haven't had good luck with this product. This is my third unit. 187635
by: John Martin02/01/2014
I had watched a video on the installation and it was easier than expected. As other coments had said the hardest part was fishing the wire to the baery. 115403
by: Nick F.05/24/2013
A+!!! Instructions were SPOT-ON and it was easy to follow along as the pieces fell together effortlessly. My wife thinks I'm a PRO!!! 81851
T-Connector worked good. Had most trouble with running the wire up to the battery. Good product and was delivered in a timely manner. 158198
by: Dennis G.08/19/2013
Easy to install works great. Tip: after installation you will read 12 volts across all of the plug terminals. 95718
by: James B.08/14/2015
Great service received it 3 days quicker than when I was told. It doesn't get any better than that. 219369
by: Len S.08/11/2014
Everything came in as ordered accept the hitch said SX on the box, but it fit my ex Sorento. 145716
by: Jim H.03/23/2015
Everything works great. Relatively easy to install for an experience mechanic. 180438
by: Jon K.07/29/2013
Extremely easy installation! Everything worked correctly on the first try. 92064
by: Dave R06/09/2015
Got here quick, went in easy. Thanks for the how to videos made life easy 202081
by: CHARLES G.03/11/2013
great to wirie in the kia good servive when you get the right parts. 70014
I had it installed today it fits perfectly and looks good 76247
by: Jerry D10/10/2013
Worked great! About 30 Min and you ready to go. 103313
fit as rquired,no problems,most parts i ncluded 162267
Easy install, good directions,quality p roduct. 72733
Great product. Better price than at a d ealer. 80917
Easy connection and works perfectly. 76912
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