CURT 55384 T-Connector Trailer Wiring Harness — Vehicle-Side USCAR to 4-Way Flat, No-Splice Dust-Cover

CURT 55384 is a vehicle-side T-connector that converts an OEM USCAR plug into a standard 4-way flat trailer wiring socket without cutting or splicing.

If your vehicle came with an OEM USCAR-style wiring receptacle, the CURT 55384 gives you an instant, plug-and-play 4-way flat output for trailer tail, turn and brake lights. Designed as a direct-fit, vehicle-specific harness, it preserves the factory plug and delivers a tidy, maintenance-friendly connection that tucks near the rear bumper when not in use. The assembly includes protective features to resist dirt and wear so your trailer wiring remains reliable trip after trip.

How does this T-connector install on my vehicle?

Installation is straightforward: mate the CURT 55384 to the factory USCAR/OEM plug and secure the harness routing—no wire cutting or splicing required. The connector is molded to match the OEM plug shape for a clean fit.

• Direct-mates to vehicles equipped with the compatible USCAR/OEM socket
• Plugs into the factory harness without altering vehicle wiring
• Molded grip tab simplifies plugging and unplugging
• Slit loom protects the wire bundle during routing

What trailer lights and functions will this provide?

The CURT 55384 outputs a standard 4-way flat connection that supports tail lights, brake lights and turn signals. It does not carry reverse light circuits or power for electric trailer brakes.

• Tail/running lights compatible with most trailers
• Brake and combined turn signal operation included
• No integrated reverse-light or trailer brake feed
• Works with conventional 4-flat trailer wiring systems

Will the connector hold up to outdoor conditions?

The harness is built with durable materials and includes a dust cover to keep the 4-way socket clean when unused. Rubberized housing and protective loom help resist abrasion, moisture, and road grime.

• Molded rubber connector housing for impact resistance
• Included dust cap seals the socket from dirt
• Slit loom prevents chafing along the wire run
• Durable terminals for consistent electrical contact

How do I confirm this fits my vehicle?

Check your vehicle for an OEM USCAR-style mating plug at the rear bumper area and verify application fitment details for the CURT 55384. Compatibility varies by make, model and production year, especially on vans and utility vehicles.

• Locate the factory USCAR/OEM receptacle at the vehicle rear
• Compare connector shape to images and fitment guide
• Consult vehicle-specific application notes before ordering
• Retains the factory connector—no permanent changes to wiring

Who this is for: The CURT 55384 is intended for vehicle owners who want a clean, reversible trailer wiring solution without modifying factory wiring—ideal for RV and small-trailer towing, boat trailers, ATVs and seasonal tow setups. It’s best for drivers whose OEM harness includes the USCAR-style plug and who need a rugged, easy-to-access 4-way flat socket for routine towing tasks.