CURT 4-Way Flat Trailer Wiring Harness T-Connector 55513 — Vehicle-Specific Plug-and-Play for Toyota Trucks

The CURT 55513 T-Connector is a vehicle-specific, plug-and-play 4-way flat trailer wiring harness that installs without cutting or splicing to power tail, stop and turn lights.

If your vehicle lacks factory trailer wiring, a dedicated custom harness like the CURT 55513 gives you a fast, reliable way to add a standard 4-way flat trailer connector. Designed to mate with the OEM taillight plugs on select Toyota Tacoma, T100 and Hilux models, this T-connector keeps your vehicle wiring intact while supplying the signals trailers need for tail lights, brakes and turn signals. The kit arrives with the wiring assembly, dust cover and the internal circuitry needed to translate vehicle lighting signals to the trailer plug safely and consistently.

How does the CURT 55513 install without cutting my vehicle wiring?

Installation uses vehicle-specific OEM-compatible plugs that connect directly to the taillight harness, so no wire cutting, splicing or soldering is required. The harness simply mates to the factory connectors and tucks away near the bumper for a clean, reversible installation.

• Direct-fit connectors for factory taillight assemblies
• No permanent modification to vehicle wiring
• Includes dust cover to protect the connector when unused

What trailer functions does this 4-way flat provide?

The CURT 55513 supplies the standard 4-way flat signals: running lights, left and right turn signals and brake lights. It is meant for basic lighting needs on trailers such as utility trailers, small boats, and cargo trailers that do not require supplemental power or braking control.

• Running/tail light circuit for visibility
• Brake light and turn signal outputs for safety
• Simple flat 4-pin socket compatible with standard trailer connectors

What protection and durability features are built into this harness?

CURT incorporates a tail light converter and SMT (surface-mount technology) circuitry to ensure consistent signal conversion and long-term durability under normal towing conditions. A weather-resistant dust cover helps keep the socket free of debris when not connected to a trailer.

• SMT circuitry for stable electrical performance
• Converter circuitry to match vehicle-to-trailer signal requirements
• Dust cover guards the plug from moisture and dirt

Which vehicles will the CURT 55513 fit and how do I confirm compatibility?

This harness is produced to fit specific model years of the Toyota Tacoma, T100 and Hilux where OEM connector configurations match the CURT design. Always check the application fit list for model years and trim compatibility before purchase to ensure a correct match.

• Vehicle-specific design for listed Toyota models
• Verify fit by consulting the product application guide or vehicle year/trim list
• Easy plug-in installation when matched to correct model years

Who is this for: The CURT 55513 is aimed at Toyota owners who want a tidy, reversible electrical solution for towing small trailers without altering the vehicle's factory wiring. It’s ideal for weekend boaters, campers, landscapers, and anyone who needs reliable basic trailer lighting—installed quickly and professionally with OEM-style connectors.