CURT Quick Plug Trailer Brake Controller Wiring Harness for Select Ford & Lincoln Super Duty — 2 ft 12-Gauge Plug-and-Play

CURT 51436 is a vehicle-specific, plug-and-play wiring harness that lets you connect a CURT trailer brake controller to select Ford and Lincoln Super Duty trucks without cutting or splicing.

Installing an aftermarket or replacement brake controller can be time-consuming when you have to trace wires and splice connections. The CURT 51436 Quick Plug harness removes that hassle by matching the factory brake controller socket on compatible Ford F-Series Super Duty trucks, F-150, Ford Expedition, Flex, and Lincoln Navigator and MKT models. The two-foot lead, 12-gauge wire construction, and slit-loom sleeve make mounting tidy and durable while maintaining reliable electrical continuity between vehicle, controller, and trailer brakes.

Which vehicles and model years will this harness fit?

This CURT harness is built for specific Ford and Lincoln applications and connects directly to the OEM brake controller socket used by those models. It is intended for certain model years of the Ford Expedition, F-150, F-250 Super Duty, F-350 Super Duty, F-450 Super Duty, F-550 Super Duty, Flex, Lincoln MKT, and Lincoln Navigator—always verify fitment against your vehicle year and trim before ordering.

• Designed to match factory brake controller connector on listed Ford and Lincoln models
• Vehicle-specific — not a universal splice harness
• Check the product's application notes or vehicle fitment guide for exact years

How do I install the CURT Quick Plug 51436 harness?

Installation is plug-and-play: insert the vehicle-specific end into the factory brake controller socket and plug the matching connector into your CURT brake controller. No cutting, splicing, or special tools are required, which speeds installation and prevents wiring mistakes.

• Plug one end into the vehicle's OEM brake controller socket
• Plug the other end into a CURT brake controller with a Quick Plug connector
• Use the included zip ties and the 24-inch cable length to secure and position the controller

What are the electrical and physical features I should know about?

The 51436 harness uses 12-gauge wires to ensure dependable current flow for trailer brake operation and is protected by a slit-loom sleeve to resist abrasion and crushing. The cable length is about two feet, giving flexibility for mounting the brake controller where it’s accessible yet tidy.

• 12-gauge wiring for consistent power delivery
• Approximately 24 inches of cable for flexible controller placement
• Slit-loom protective sleeve and included zip ties keep wiring neat and protected

Will this harness work with different types of CURT controllers and trailers?

The Quick Plug design is compatible with most CURT controllers that use the same connector style, including proportional, inertial, and time-delay units. It enables straightforward use with nearly any trailer equipped with electric brakes when paired with a matching controller.

• Compatible with CURT proportional, inertia, and time-delay controllers with Quick Plug
• Suitable for towing trailers equipped with electric trailer brakes
• Can serve as a replacement harness for a factory or existing CURT installation

Who is this for: The CURT 51436 Quick Plug wiring harness is aimed at truck owners and fleet operators who want a fast, reliable, and factory-like installation for a trailer brake controller without splicing into their vehicle’s wiring. It's ideal for owners of compatible Ford and Lincoln models who need a durable, clean-looking connection for regular towing, seasonal use, or when upgrading or replacing a brake controller.