bing tracking image
  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # C56347
Our Price: $60.53
You Save: 45%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Shipping Weight: 1.95 lbs
Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

Need help with installation?
Locate installers near me
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. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56347 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (22)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C56347

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • CURT

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.


  • 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 behind tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter 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 using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


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 trunk.

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.

Powered Tail Light Converter with Surface-Mount Technology

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.

Curt SMT Circuit Boards

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.

56347 CURT T-Connector - Surface Mount Technology - 4 Wire

Replaces Curt C55503

Installation Details C56347 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56347

Average Customer Rating:  4.6 out of 5 stars   (22 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.

2008 Kia Sedona

My package for the Curt trailer wiring assembly for the 2008 Kia Sadona was missing the wire connectors, the fuse, the ring connector for the 12GA wire, the zip ties, and the two sided tape. I was not happy with it at all!

Etrailer Expert

Brooke M.


Thankyou for bringing this to our attention. Our customer service team should be reaching out to you in the near future.


The instructions for this confused me at first. I watched a video on how to install it, and followed those instructions after looking at a picture that came with the harness, it seemed to match. I then installed the blue/green wires on the left side and attempted to run the Yellow/White to the other side, but it was not long enough to reach. I then checked the written instructions and it said to do the reverse, so good thing it did not work the first time.
Installing the ballast was a bit of a problem. The picture showed it double sided taped to the back of the lens cover on the left side,but after attaching it there, I was unable to put the light back into place. I managed to move it down and squeeze it into the gap under the light, between the bumper and the frame, and then everything fit.
Once that was in place, all the rest installed easily, and worked with the boat no problems. I would blame my initial installation error on simple laziness. I hate reading instructions unless I really need to. ;)
Good product, working perfectly so far.


All the trailer needs I've had e-trailer always has what I need. Thankx


The products I received , trailer hitch ,and wiring harness , were perfect . Bolt holes lined up perfectly. Wiring harness ,and directions were very simple to read , and install went according to plan . Very Happy. Products , were delivered in a timely manner. Great.


Great trailer hitch. Fit perfect. Installation video was very helpful. Delivery was in two days! I will definitely buy from you again. I wish all of my purchases were this easy.


I installed wiring harness my self and everything worked perfectly.
Shipping came as planned too.


Good instructions,easy to install works great have had no problem

2014 Kia Sedona

Great product,fast shipping,over all I will be buying from etrailer again


I had to have a company UHaul install this unit as they installed a hitch

Eugene C.


Installed at U Haul rental company .Works great. Great product


Kit was totally inclusive and super easy to install. Also, it was very reasonably priced and delivered quickly. I was very satisfied with the product and the service.


Just as advertised. Easy to install. Works perfectly.


Great product a little tricky to run wires without being seen



2011 Kia Sedona



2012 Kia Sedona

2008 Hyundai Entourage

2012 Kia Sedona




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

  • Does Trailer Wiring Harness for 2009 Kia Sedona have to be Connected to the Battery
    You will need to attach the trailer wiring harness power wire from # C56347 to the battery on your 2009 Kia Sedona. No other circuit is recommended. This is because of several factors: 1) It is not tested with any other circuit 2) Deviating from the instructions can result in a voided warranty 3) If tapped into the fuse panel you will loose some of the circuit protection If they tested it with other circuits, that would take care of 1 and 2 but 3 still remains. The issue is that the...
    view full answer...
  • Trailer Wiring Harness for a 2011 Kia Sedona
    On the product page for wiring harness # 118410 there is a section called specs below the description. The warranty for this item is listed there and is a 1-year limited warranty. Since you are having repeated problems with the wiring harness there may be some outside factor contributing to their failure. A short circuit on the trailer wiring, corrosion on the trailer connectors, having too many lights that overdraw the harness could all be possibilities. If the vehicle just does not like...
    view full answer...
  • Easier to Install Trailer Wiring Recommendation for 2009 Kia Sedona
    We have pretty easy to install trailer wiring kits that fit your 2009 Kia Sedona like the Tekonsha part # 118410 which does not require splicing into your vehicle wiring but we don't have a simple plug and play kit that would plug into a port at the rear of your vehicle. I attached an install video for this kit for you to check out as well.
    view full answer...
  • What is the Correct Trailer Wiring Harness for a 2009 Kia Sorento Without Factory Tow Package
    The connection points for the Curt trailer wiring harness, # C56347, are designed to plug in line with the vehicle tail light wiring connectors. I have included a link to the installation instructions for you.
    view full answer...
  • Curt Powered Taillight Converter C56347 Installation on 2014 Kia Sedona
    The black wire does indeed need to be connected to the positive battery terminal, through the supplied fuse holder. The converter box receives the signals from the taillight circuits, but it gains the voltage necessary to illuminate the trailer lights from the black power wire.
    view full answer...
  • Recommended Hitch and 6-Way Wiring Harness for 2010 Kia Sedona
    The recommended custom fit wiring for your 2010 Kia Sedona with a short wheel base is the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56347. This part provides a 4-way flat trailer connector at the back of your Kia to power your trailer's signal lights. It sounds like you have a 6-pole connection on your trailer so you will need the 6-pole adapter # 37175. You will be able to retain use of the 4 pole connector, and the mounting bracket is included as...
    view full answer...
  • Parts Needed To Install 7-way Connector and Curt Echo Wireless C51180 On 2012 Kia Sedona
    I would be happy to help! The Curt T-Connector # C56347 and # C89KR you were looking at are both confirmed to fit your 2012 Kia Sedona and will both give you the 4-way connector you need. There is not major difference between the harnesses so I recommend going with the most cost effective option at the time. Moving on to adding a 7-way connector to use the Curt Echo Wireless # C51180 I recommend the # ETBC7L which was designed specifically for the Echo. The # ETBC7L will plug into your...
    view full answer...
  • Brake Controller And Brakes Recommendations For 2010 Kia Sedona And Trailer
    Thank you for the spec sheet on the axle you have on your trailer. I spoke with my contact at Dexter and they told me that you do not need to replace your axle, you can just upgrade the one you have. They told me that you have the brake mounting flange mounted on your axle so what you will want to do is add a new hub and drum, the brakes, and wiring for your trailer, and you should be good to go. The hub and drum I recommend is the Trailer Hub Assembly, part # AKHD-545-35-G-K....
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Amanda M
Written by:
Amanda M

At 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.

Product Experts Available Now!
Call 1-800-940-8924