CURT 4-Pin Trailer Wiring Harness for Honda Pilot — Vehicle-Side Plug-and-Play T-Connector, Molded 4-Way Flat

CURT 56519 is a vehicle-specific, plug-and-play 4-way flat trailer wiring harness that adds a standard trailer connector to compatible Honda Pilot models without cutting or splicing factory wiring.

If your Pilot didn't come wired for towing or you want a clean, OEM-style connection for a small trailer, boat, or cargo carrier, this CURT custom T-connector delivers a quick, reliable electrical link. It uses vehicle-specific plugs that mate with your factory taillight sockets so you can power tail lights, turn signals and brake lights on the trailer while maintaining the integrity of your vehicle's wiring.

How does this harness install so quickly?

The CURT 56519 is built as a true plug-and-play T-connector: each vehicle-specific lead plugs into the factory taillight harness and the assembly routes to a molded 4-way flat socket. No cutting, splicing, or soldering is required, which minimizes installation time and preserves factory wiring warranties. Basic hand tools and a few minutes are typically all that's needed.

• Pre-terminated OEM-style connectors for direct fit to taillight sockets
• Molded 4-way flat connector ready for standard trailer plugs
• Included mounting features and dust cover for neat, protected installation
• Wiring designed to follow factory routing for a discreet appearance

What vehicle signals and functions does the 4-pin provide?

This 4-way flat harness supplies the common lighting signals a small trailer requires: tail/parking lights, left/right turn signals and brake lights, plus a ground. It does not include a dedicated 12V power feed or electric brake control circuit; those require separate wiring or adapters. The harness is ideal for lightweight trailers, utility trailers, and basic boat trailers.

• Tail/parking light circuit for marker and running lamps
• Combined turn and brake signal outputs for left and right sides
• Reliable ground connection integrated into the harness
• Not intended for trailer battery charging or electric brakes

What features protect the connection and ensure long-term reliability?

CURT designs this harness with surface-mount circuitry and molded components that resist vibration, moisture, and heat. The 4-way socket includes a rubber dust cover to keep contaminants out when the trailer isn't connected. High-quality terminals and strain reliefs reduce the chance of loose contacts over time.

• Surface mount technology for stable electrical performance
• Molded connectors and strain reliefs to prevent wire fatigue
• Rubber dust cover to shield the 4-flat socket from weather and dirt
• Durable insulation and routed wiring for long service life

Who this is for: The CURT 56519 is best for Honda Pilot owners seeking a quick, reversible wiring solution for towing small trailers without altering factory harnesses. It suits DIY installers and pro shops who need a vehicle-specific, OEM-compatible connector to power standard trailer lighting. If you require trailer battery charging, heavy electrical feeds, or electric brake control, consider adding a dedicated 12V feed or a 7-way harness designed for those features.