CURT 4-Way Flat Trailer Wiring Harness — Vehicle-Side Custom Fit for Mazda CX-5/CX-50, Plug-and-Play, No Cutting

CURT 56487 is a vehicle-specific, plug-and-play 4-way flat trailer wiring harness designed to give select Mazda CX-5 and CX-50 models a reliable trailer light connection without cutting or splicing.

If your Mazda lacks factory trailer wiring, adding a CURT custom T-connector is one of the fastest and most dependable ways to equip it for towing. This harness interfaces directly with the vehicle's taillight assembly via OEM-compatible plugs and supplies a standard 4-way flat socket that carries running lights, turn signals and brake lights to a trailer. The package includes all wiring components, a tail light converter to ensure compatibility, and a protective dust cover for the connector when it’s not in use.

How does the CURT 56487 make trailer wiring installation simpler?

The harness is engineered for plug-and-play installation so you won’t need to cut factory wires, solder joints, or splice connectors. Vehicle-specific OEM-style plugs mate with the taillight assembly, minimizing installation time and preserving factory wiring integrity.

• Direct-fit OEM-compatible connectors for the Mazda tail light sockets
• No wire cutting, splicing, or soldering required
• Includes mounting hardware and dust cap for a tidy installation

What trailer functions does the 4-way flat connector provide?

The supplied 4-way flat socket transmits essential lighting signals from the vehicle to the trailer: running/taillights, left and right turn signals, and brake lights. The included tail light converter adapts the vehicle’s lighting signals for standard trailer circuits to maintain correct trailer light behavior.

• Running/taillight circuit for visibility
• Left and right turn signal outputs for safe lane changes
• Brake light signal to alert following traffic

Is the CURT wiring harness durable and reliable for regular towing use?

CURT builds this harness with quality components and SMT circuitry to improve electrical stability and long-term durability under typical towing conditions. The design resists common stressors like vibration and moisture when installed correctly and protected at the connector end with the provided dust cover.

• SMT circuit technology for consistent signal performance
• Corrosion-resistant terminals and sealed connectors where applicable
• Dust cover included to guard the socket when unused

Which Mazda models and model years is this harness compatible with?

This CURT 56487 harness is made as a vehicle-specific fit for select Mazda CX-5 and CX-50 model years. Always verify fitment using the vehicle application details before purchasing to ensure correct compatibility with your year, trim and factory wiring configuration.

• Designed for specific CX-5 and CX-50 years and trims (see application guide)
• Plug-and-play fit avoids modifications to factory wiring harnesses
• Not universal — confirm vehicle fitment prior to installation

Who is this for: The CURT 56487 is ideal for Mazda owners who need a straightforward, factory-friendly way to add basic trailer lighting to their CX-5 or CX-50. It suits DIY installers who prefer a clean plug-in solution and professional installers who value vehicle-specific connectors. If you tow trailers, small boats, utility trailers or cargo carriers and want an OEM-like installation without cutting factory wires, this harness delivers a reliable, compact 4-way connection with industry-grade components and a protective dust cover for long-term use.