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CURT Custom Wiring Harness #55542

Class: Wiring UPC: 612314555420

Where To Buy

MSRP $45.20

  • 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 3-wire to 2-wire tail light 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
Warranty One Year Limited
T-Connector Location P3,P4
Finish Blank
Part Type Custom Wiring Harness
Shipping Weight 0.790
Mount Type Description Blank
Side Application Type Description Blank
Turn and Brake Circuits 3.0 Amps
Tail Light Circuits 7.5 Amps
Electrical System Type 3W
Output Type 4-Way Flat
Converter Type Circuit Protected
UPC 612314555420

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 Toyota Corolla sedan (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
2012 Toyota Corolla Sedan
2013 Toyota Corolla Sedan
2003 Toyota Corolla Sedan
2006 Toyota Corolla Sedan
2009 Toyota Corolla Sedan
2005 Toyota Corolla Sedan
2008 Toyota Corolla Sedan
2010 Toyota Corolla Sedan
2004 Toyota Corolla Sedan
2007 Toyota Corolla Sedan
2011 Toyota Corolla Sedan
Page 1 of 2 11 Total Vehicles


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It's great not to have to splice into wiring - makes it worth the cost. I think I would like to have tried installing the wiring without removing the weatherstrip and trunk liner - it hasn't fit right since. I have direct access to the tail lights - that wasn't clear from the instructions. The unit didn't work on battery power - once the car was running, it worked fine. My Toyota has a quirk that the running lights don't turn on for 13 sec. after the parking brake is released.