To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
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.
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 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 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. 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.
California residents: click here
Works as described and the install videos were an amazing step by step. If I could give 4.75 stars i would because the power wire was short about 6 feet and I followed the video to a T.
The quality is great! And all the parts were correct and arrived fast!
Install took a little longer than 2.5 hours as my husband and son had to redo the wiring. They did follow the video which helped a lot!
Easy to install, only wished you offered a wiring harness for a 8 pin plug. But overall I like the product.
Trailer hitch fit well, new cross member much
Thicker and heavier than one removed. Mst remove rear bumper
For acess. This took me 18 hours to install.
Perfect fit, wiring harness and hitch. Directions were very clear, and installation was simple.
wiring works fine-I wish there was an easier way to get to the battery-Or start bleeding in to lighter adaptors that most vehicles have-You've got installing hitches down pat, though!
Installed just like the video describes. Thank you
Top quality!, delivery was spot on, no delays. The folks at etrailer stayed in contact with me from day one, answered all my questions and I truly appreciated this!, the how too videos are awesome and extremely helpful as well
Brooke M.
5/13/2025
Really glad to hear that! Let us know if we can help with anything else in the future :)
Installation was smooth since I had to take off all the body cladding to install the trailer hitch.
Wiring harness made the project so much easier! Fast shipping, great customer service! The video tutorials were immensely helpful. Got a little stuck on running the hot lead, since everything is so tight under the Jeep, but we figured it out.
Works well
Worked out great
Have bought two hitches from etrailer. In both cases, the right product and great support. For sure, I will buy the hitch from my next car here.
Very easy install
This is a well made wiring harness. Install is a bit involved but everything fit perfectly.
Great products at competitive prices. Video was very helpful! Everything exactly as promised. I am a returning customer.
Harness worked just as explained in the included install specifications.
Awsome , fast delivery and great videos for installing
Package was in the same bad as hitch, but everything was there, so what do I care. I’ve been using solder seal shrink wrap but end connectors. Heat gun melts solder and shrinks wrap. Routing power wire to battery is not for the faint of heart, but I knew what I was getting into. Service was fantastic. Ordered Tuesday and had it on Thursday!
Great prompt service identifying the harness needed and delivery!
I just received and installed a class 4 hitch on my 2022 Grand Cherokee Laredo L and as usual it was easy to install, and as usual the hitch is top notch. This is my 5th hitch I've purchased through the years and I will purchase all my hitches from etrailer. In fact I'm about to purchase number 6,thanks for the great products.
Exactly what I wanted. A quality harness that is built to last.
This wiring harness is great, all the connectors fit and watching the installation video helped save time and headache figuring out how to route the power wire to the battery. Plan for a few hours to install it, I installed mine while also installing the receiver hitch which makes access easier. Thank you etrailer!
Still working without issues. Installation was just as the video displayed. Solid product one year on!
Great hitch fairly easy to install. About 4 hours. Nice step by step instructions and good videos on line. I highly recommend. Just take your time step by step and you will succeed.
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Gwendolyn Y.
3/11/2025
Your husband and son did a great install! What are you going to be towing?