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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 # C56301
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Custom Fit Vehicle Wiring

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C56301 - Custom Fit Curt 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. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56301 or order online at etrailer.com. Free expert support on all Curt products. Guaranteed Lowest Price 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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Curt Custom Fit Vehicle Wiring - C56301

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

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 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


  • 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 in your rear cargo area. You will have to remove the trunk floor coverings, trim cover, and the rear scuff panel 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.

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.

56301 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C56301 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

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.

Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56301 Review

Today we're going to be taking a look at the Curt T-connector vehicle wiring harness with a four pole flat trailer connector. This product fits certain years and models of the Honda Accord. It's going to provide a four way flat connector at the back of the vehicle to power your trailer's signal lights. This is compatible with five pole, six pole, and seven pole adapters. Adapters are sold separately. And it's going to come with a dust cap for the four way flat plug.

That way you can cover up the connection points when your plug's not being used. The black box is the included tail light converter. This is going insure that your vehicle's wiring matches that of your trailers. The power module is going to connect directly to the vehicle battery through the wiring to avoid overloading the vehicle's electrical system. Now it's constructed using surface mount technology which is going to offer consistent, reliable performance. What that does is it maximizes the trailer light inaudible 00:00:45 intensity while producing minimal heat, and it's going to ensure superior operation even in rough road conditions. Now this unit's designed to connect quickly and easily.

You don't have to worry about cutting or splicing any wires. Just locate the connection points in the cargo area of the vehicle, and plug in your connectors. The connector with the green wire, that's going to go in the passenger side. The rest of the connectors are going to be on the driver's side. Now these plugs are going to match up perfectly with the ports on the vehicle. There's going to snap lock together for a nice, tight secure fit.

Once you get all those connected, you'll need to make your ground connection. That's going to be the white wire the ring terminal attached to it. You want to get that grounded in a nice, clean metal location with the included grounding screw. Then you can mount the converter box using the double sided adhesive tape that's provided with the kit. Then you can run the hot lead to the vehicle battery. Hot lead is going to be this black wire right here.

It's going to get connected to the bundle of black wire with one of the included butt connectors. The other end of the black wire runs to the vehicle battery, gets another butt connector attached to it and attaches to one half of the fuse holder. The other half of the fuse holder gets a ring terminal attached to it and connects to the positive post of the vehicle battery. The kit does include the 10 amp fuse and it's going to come with some zip ties so that way, once you have everything connected, you can secure any excess or slack in the wiring by using the zip ties. Now once your install is complete four way connector is going to be stowed in an out of the way location within your cargo area. We always recommend that you use a small amount of Dial Electric Grease on all your electrical connections like the plugs on the vehicle and the four pole connector itself and that's going to help prevent corrosion to the connection points. It is sold separately so if you need some you can find it right here ate e-trailer.com. When it comes to the maximum amperage for the stop and turn lights, we're looking at three amps per circuit and for the tail lights we're looking at six amps per circuit. That's going to do it for today's look at the Curt T-connector vehicle wiring harness with a four pole flat trailer connector.

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56301

Average Customer Rating:  5.0 out of 5 stars   (3 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.

- C56301

Good quality. Works as expected. Makes wiring a snap. 683461

- C56301

Great addition to complete the trailer hookup. Wiring still works great after a year. 610725

- C56301
2012 Honda Accord

This is a great product. I own a Honda Accord coupe so I occasional use this hitch and rental trailer ($15/day) to move inconveniently large items. Because the Accord has LED lights, a power line is included to attach to the vehicle battery to power the trailer's brake lights. Installation of this power line requires threading it the length of the vehicle and attaching it to the battery. The rental place will not rent a trailer if the brake light fail to light. Since my towing needs are infrequent and usually short trips, instead of permanently installing the power line, I purchased a 12 volt battery (about the size of half a loaf of bread) and I only connect it in the trunk when needed, works great. I've purchased two of these hitches (for Accord sedan and coupe, non-LED and LED), installed them both myself, and they work perfectly. Highly recommended. 564555

Although it is possible to power the trailer lights with the wiring harness part C56301 with a seperate battery in the cargo area, we do not recommend it. We do not recommend it because there is not a source to consistently charge the battery and the trailer lights may drain the battery while you are towing. Also wiring the harness this way may void the warranty.
-- Heather A - 09/13/2018


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Info for this part was:

Edited by:
Lindsey S
Installed by:
Cole B
Written by:
Chelsea B
Updated by:
Kristina F
Updated by:
Isabelle B

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