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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. Trailer Hitch Wiring
  5. No Tow Package
  6. Vehicle End Connector
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
CURT

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

Part Number: C56376
In Stock
$62.89
Retail:$104.95
You Save: 40%
Custom Fit Vehicle Wiring

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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. 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 C56376 or order online at etrailer.com. 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.
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  • Reviews (30)
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CURT Custom Fit Vehicle Wiring - C56376

Features:

  • 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 in rear cargo area
    • 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


Specs:

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


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in your rear cargo area. You will have to remove the trunk floor coverings, storage trays, rear scuff panel, and side trim panels to access these connection points. 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.


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.



56376 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Tekonsha 118749

Installation Details C56376 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Ratings & Reviews

4.6

30 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:
2017 Kia Niro

This trailer wiring installation was completed without too much fuss. The converter box wiring for the drivers side tail lights was very short and barely cleared the side panel when replacing. They should be about 8 or 10 inches longer.



by:
Kia Niro

Wiring the harness went as described in the attached directions. Directions were clear and concise. Wiring the 12-volt power cable on the Kia Niro... Not so fun :)

Mark L. profile picture

Mark L.

11/13/2018

After a year of using with trailer... no problems - works great!



by:

A few weeks ago, another driver was kind enough to tell me that my driver's side brake lights were out. They are LED, so I new it wasn't a bulb. I checked all of the fuses in the engine compartment fuse block and the interior fuse block as well. No blown fuses. I disassembled the interior panels (a pain) to access the custom-fit Curt Unit connectors and unplugged them, and plugged the OE tailight/brakelight connectors back together and the brake lights now work fine without the Curt Unit. As it turns out, the the warranty is for one-year and this Curt Unit failed after one-year and three weeks. etrailer won't do anything about it. I will be reaching out to Curt and hope that they make this right, otherwise I won't be buying any Made-in-Mexico Curt products ever again.



by:
Kia

Works fine in my 2020 Kia Niro EV. It was a little hard to route the wire from the rear to the 12v battery, but I was able to follow the brake lines and tie to them along the driver's side.

I only occasionally use the hitch as the Niro EV is not rated for towing, but since it shares the chassis with the hybrid - which is rated for towing small loads - the hitch fits perfectly.



by:
2019 Kia Niro

Perfect fit. I only wish the trailer plug was about 18" longer. I hid the box in the wall on the left side and ran the trailer cord back to the middle of the car and fished it through an existing hole in the bottom of the rear compartment. There was a rubber gromet in the hole, so I removed the gromet, cut a slit in it, ran the cable through the hole and reinstalled the gromet with the wire running through the slit. All is great, but cable is only sticking out about a foot. A little longer would have been nice.



by:

Good wiring fit. Eight more inches and would have been perfect to place control box anywhere I wanted.



by:
Kia

Extremely helpful instructions to install on my Kia Niro Hybrid Plug-in [PHEV]. LOOKS GREAT.



by:
2017 Kia Niro

2 day free shipping. Excellent customer service.



by:

Easy to order, good price and quick shipping. Helpful representative.



by:
2020 Kia Niro

I couldn't have installed it without your video. Thank You



by:

good quality



by:

Works great, just don’t forget the ground attachment!



by:

Easy to hook up and worked well.



by:

Excellent products
Thank you



by:

Great prices. Excellent service and always in stock.



by:

Very fast!



by:
2019 Kia Niro

Thank you, you guys are amazing and Shawn was outstanding



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2019 Kia Niro



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2019 Kia Niro



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2019 Kia Niro



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2017 Kia Niro



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

  • Why Would Trailer Wiring Ground Wire have Voltage
    If there's a short on the trailer wiring to the frame of the trailer it can cause the ground wire to have voltage since it typically attaches to the trailer frame. So what I would recommend you do is go over the trailer wiring looking for any shorts to the frame and clean up as needed.
    view full answer...
  • Parts Needed To Tow a Camper With a 2020 Kia Niro Plug In Hybrid
    So I am going to start by warning you the owners manual for your 2020 Kia Niro Plug in Hybrid is very confusing as they don't specifically state any towing capacities but place a lot of emphasis on working with the parts manufacturer for towing capability. I would start by talking to your local dealer to also help with the input of what you are going to be able to tow. Also there is not a receiver specific to your PHEV but I do know some have installed the Curt Trailer Hitch Receiver...
    view full answer...
  • Trailer Hitch Capacity for 2017 Kia Niro
    We have a Class III hitch confirmed as a fit for your 2017 Kia Nira, part # C13329 which has a 3,500 lb trailer capacity. What you will need to do is check your owners manual for the towing capacity that Kia recommends. If it's lower than the hitch capacity you have to go by the lower rated figure as the overall capacity. For trailer wiring you then would want the part # C56376. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with...
    view full answer...
  • Guide to Use When Routing Power Wire to Install Trailer Wiring on 2018 Kia Niro
    When routing the power wire of a trailer wiring harness up to the battery of a vehicle you want to make sure you avoid any pinch points or hot exhaust pipes. I wish we had a video that covered that but the best we have is a help article that has many tips and options for accomplishing what it is you are looking to do.
    view full answer...
  • Can Power Wire of Curt Wiring Harness that Fits 2020 Kia Niro Run to Vehicle Battery
    Yes, the Curt trailer wiring harness part # C56376 that you referenced can install by running the power wire directly to the battery like you mentioned.
    view full answer...
  • Recommended Aftermarket Towing Products that Wont Void Vehicle Warranty on 2017 Kia Niro
    Adding a trailer hitch receiver like the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13329 that bolts on to the frame of your 2017 Kia Niro will not void your warranty from Kia. You are covered under federal law. Consumers of aftermarket products are protected by the Federal Magnusson-Moss Warranty Act. The Act states that if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever modifications you have...
    view full answer...
  • Wiring Harness Fits for 2018 Kia Niro
    The wiring harness fits we have for the 2018 Kia Niro, which include Curt part # C56376 and Tekonsha part # 118749 that you purchased, specifically exclude fitment on the plug-in hybrid version of the car. You'll see this notice on the linked page. If you have the plug-in hybrid we do not have a trailer wiring harness for it. I did check with my technical contact at Curt about installing wiring in your vehicle. He said that a Niro plug-in hybrid owner has reported using a 12V circuit for...
    view full answer...
  • Trailer Wiring Harness Recommendation for 2017 Kia Niro
    The correct trailer wiring harness you'd want for your 2017 Kia Niro is the Curt kit part # C56376 which comes with connectors that were specifally designed for your vehicle. If you check out the install instructions I attached you'll exactly how all of the connections will need to be made.
    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 Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
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

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