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CURT Custom Wiring Harness #56178

Class: Wiring UPC: 612314561780

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  • Plugs into vehicle tail light assembly to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Equipped with a pulse width modulation (PWM) converter
  • Constructed with SMT circuitry for better performance and durability
  • Dust cover included to keep connector clean when not in use
  • Backed by a limited one-year warranty
  • Made in USA
Instruction Sheet Download pdf
Installation Video
Part Type Custom Wiring Harness
UPC 612314561780
Battery-Powered Yes
Side Application Type Description Blank
Shipping Weight 1.550
T-Connector Location P3,P4
Warranty One Year Limited
Finish Blank
Mount Type Description Blank
Turn and Brake Circuits 3.0 Amps
Tail Light Circuits 6.0 Amps
Electrical System Type PWM
Output Type 4-Way Flat
Converter Type Pulse Width Modulation (PWM) (Stop, Tail, Turn)

Additional Information

A CURT custom wiring harness (also called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring.

Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT's custom wiring harnesses come into play. Custom wiring harnesses plug into your vehicle's electrical system using original equipment (OEM) connectors. Our custom wiring harnesses use two or more OEM connectors to plug in at the taillight assembly and provide a standard trailer socket to allow a trailer to be plugged into your vehicle's power system.

This harness provides a 4-way flat connector socket and comes with a circuit-protected converter. It is designed to be a custom wiring harness for certain years of the Ford Fusion (to verify your vehicle compatibility, see the CURT application guide at CURT custom wiring harnesses are long-lasting and quick to install. They come with dust covers to keep your connector clean when not in use and feature a one-year limited warranty to give you peace of mind.


Year Make Model Style Install Time Other Hitches
2014 Ford Fusion S
2015 Ford Fusion Energi SE Luxury
2015 Ford Fusion S
2013 Ford Fusion S
2014 Ford Fusion S Hybrid
2015 Ford Fusion SE
2013 Ford Fusion SE Hybrid
2014 Ford Fusion SE
2014 Ford Fusion SE Hybrid
2015 Ford Fusion S Hybrid
2013 Ford Fusion Energi SE
2013 Ford Fusion SE
2014 Ford Fusion Energi SE Luxury
2015 Ford Fusion SE Hybrid
Page 1 of 2 14 Total Vehicles


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Installation Video