Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2018 Subaru Outback Wagon
These items fit your vehicle
2018 Subaru Outback Wagon
Arrives before Christmas To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.
Features:
Specs:
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area.
Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your 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.
A tail light converter is built into this T-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 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.
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This product comes out of the package looking good and strong and fitting the vehicle well. Installation is straightforward, as long as there's a place to slip the plug through the body to the outside of the vehicle. My unit seems to have an issue with the lights: one side has the brake light constantly lit, the other side is normal. With the Toyota system of variable electric signals to one bulb in the rear of the truck, I can see how it gets difficult to process for this adapter, but there's an electrical box built-into it that is supposed to handle that. And obviously it should be okay because one side works correctly.
Very high quality and easy to install even in a Toyota 4 runner. It works great.
Working good
Bought in February so I could tow my boat in the spring due to a failed box. Installed correctly by referencing the installation manual and grounded to frame. Never has worked since I got it threw it in the garbage.
Everything arrived in a timely fashion and, with a little help from my jack, I got the trailer hitch on my 2002 4Runner. All was very well packaged, and I appreciated that the shipping was included in the price.
The wiring kit was a different story. I know that you have trouble even within brands and years dealing with different wiring packages and the manufacture of the car is not very good at finding the plug-ins for the wiring harness for the trailer (I went to Toyota and the parts man could not find it). I finally took it to a body repair guy since I knew that I would break some of the interior paneling if I tried to take it out. Sure enough, it was conveniently located--but no one, not the manufacturer of the wiring harness or Toyota could tell me where to look.
It is now in place, after two or three days of periodic hassle, and working fine.
The Customer Service for e-Trailer is another matter. I am not telling you all something that the company does not know. The help lines are so swamped that the don't call you back, even though the people I finally did talk to tried to help. They even encouraged me to send pictures of the plug-in point I found--except, surprise, surprise--the website rejected my e-mail with the picture because the inbox was 'full.'
eTrailers needs more employees--and needs to pay them more so that they don't get frustrated with their jobs and move on.
But, all in all, despite the hassle with communication, it was a good experience.
My '96 4Runner hasn't had operating trailer lights for a little while. The company that repaired it last did not place the control box in spot where the elements could do no harm. Winter weather and moisture caused a short and there you go. No lights.
Toyota dosn't make a replacement part any more.
Your C55341 was the ticket. After I removed all the old wiring and spare tire which needed air by the way. I was able to do a simple pulg and play and feed the four-pole connector thru the channel like OEM. Ran a meter test. Plugged into the trailer connector everything works as it should. Thanks for the hook up.
I purchased this item to replace a failed original equipment unit in a Toyota 4Runner. This product is an easy to install plug in device. It is rated to handle more current than the original unit & has worked well since installation.
Ray S.
12/13/2017
It has been a year. The 4Runner tows intermittently. No problems with trailer lights since this unit has been installed.
We have a '98 4runner and needed to rent a trailer but our trailer blinkers were not working.
I ordered this wiring harness and replaced the old one. We tested it and it works great!
The product was incredibly easy to install (took about 30 minutes) and comes with great instructions.
Thanks for continuing to make this product for those of us with old cars!!
Great product, fit and worked as described along with great instructions. My only suggestion would be to have the final wiring which goes out of the vehicle to the trailer hitch location be able to be "unplugged" from the black control box so it would be easier to wire it through the floor access of the 4Runner as the routing hole is too small to fit the flat trailer connector. In any case, I worked it out and now have fully working trailer lights once again.
Not the best quality some wire exposed on harness , Also didn’t fit my 3rd gen 4runner well in the fact the box is on the right side with no way to put the 4 pin trough the body. (on the left side there is a thru port ) would not recommend .
I am Extremely Happy!!! : ) with my trailer hitch order. Installation was smooth and easy. It took me less than an hour to install including the light kit. I wish all my projects would go this well.
Much Appreciated.......
Wiring harness is easy to install; First one in '99 Toyota 4 Runner was installed by hitch installer in 08 and until a short in trailer light shorted left turn signals never had any problems; if new one last 10 years will be great
The wiring harness went into my trailer better than harness when it was new back in 2001!
This unit was replacing a dealer installed unit from 20 years ago that recently died.
Pretty easy to fit even for a non mechanic like me! It really was plug and play. The only tricky part was getting the old harness connectors off. I guess after 20 years they had welded themselves together nicely. Once that was done, the rest was straightforward. Thanks Etrailer!
Worked for a month the nothing rechecked all wires and was still good but wouldn't let powers goto the connection for trailer. Forgot where I bought it from and I'll buy a new one now that I was the email
Easy to install works good.
Needs a small connector for the trailer wires to run though the frame. Directions advise for you to roll it up and run it out of the back when needed instead of coming out from under the vehicle.
I received the harness on Saturday at 1:00 and had it installed and working properly by 3. Would have been quicker if I had followed instructions on video. I had left and right crossed by using colors on vehicle. Other than my error no problems.
Only use it Twice a year, May and October. so far its worked fine.
Everything was just as ordered. Shipping was quicker than originally said.
What a breeze to install, maybe a tip on how to get the wiring to the outside of the vehicle would be helpful, other than out the tailgate.
Fast shipping, great service A+++++
etrailer was very helpful and shipped q uick
Great experience from ordering to receiving. No disappointments in the products as well.
Do you have a question about this Custom Fit Vehicle Wiring?
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Mike L.
9/16/2025
It sounds like you have a bad ground connection. Find the grounding point where the trailer harness converter box grounds to the vehicle chassis. Make sure that connection is made to clear, bare metal. If it isn't, remove the ground screw and sand down a dime-sized area around the connection, down to bare metal. Install a star washer between the the ground lug's ring terminal and the vehicle chassis. This will ensure that the washer 'bites' into the metal and gets a good connection. Once installed, spray some spray paint over the connection to protect it. Rust Oleum works very well. Find the main ground connection on the trailer, which is usually on the trailer tongue. Give that connection site the same treatment as described above. You'll never have a problem again.