CURT Quick Plug Trailer Brake Controller Wiring Harness for Select Ford & Lincoln — 24" 12-Gauge Direct-Fit

The CURT 51436 Quick Plug wiring harness provides a plug-and-play connection between your vehicle’s factory brake controller socket and a CURT trailer brake controller—no cutting, splicing, or complex wiring required.

If you tow trailers with electric brakes, a clean, reliable connection between the tow vehicle and brake controller is essential. The CURT 51436 is a vehicle-specific adapter designed to mate directly with factory sockets on select Ford Super Duty models, F-150, Expedition, Flex, Lincoln Navigator and MKT models. Built with 12-gauge wiring and a protective slit-loom sleeve, this 24-inch harness simplifies installation while delivering consistent power for trailer braking systems.

How does this harness simplify installation?

Installation is made straightforward by the vehicle-specific plug that matches the OEM brake controller socket. You simply plug one end into the vehicle’s factory connector and the other end into your CURT brake controller—no wire cutting, splicing, or soldering required. The 24-inch length gives enough reach for common dash mounting locations.

• Direct-fit OEM-style connector for select Ford and Lincoln models
• 24-inch lead for flexible controller placement
• Includes zip ties to secure harness behind dash
• No modifications to factory wiring harness

Will this harness work with my CURT brake controller model?

The 51436 Quick Plug is compatible with most CURT brake controllers that use a matching quick-plug interface, including proportional, inertia and time-delay units. Confirm your controller uses the same plug type before purchase to ensure compatibility. This harness serves both as an original install option and as a direct replacement for worn adapters.

• Works with CURT controllers that accept quick-plug connections
• Suitable for proportional and time-delay controllers
• Can replace a damaged or missing factory adapter
• Designed for trailer setups with electric brakes

How durable and reliable is the wiring for towing duties?

Curt constructed this adapter using 12-gauge wire to maintain stable power delivery between vehicle and controller, which helps ensure consistent brake signal strength to the trailer. The wires are bundled in a slit-loom sleeve that resists abrasion and crushing when routed through the dash area. Small accessories like included zip ties help keep the installation neat and reduce strain on the connector points.

• 12-gauge wires for consistent electrical flow
• Slit-loom sleeve protects against wear and chafing
• Zip ties included for tidy routing and strain relief
• Connector keyed to prevent incorrect installation

Who is this for? The CURT 51436 Quick Plug wiring harness is ideal for owners of compatible Ford and Lincoln trucks and SUVs who want a fast, reversible way to install or replace a trailer brake controller connection. It suits DIY installers, fleet vehicles that need reliable serviceable components, and anyone seeking a clean, factory-style connection for towing. Before purchasing, verify vehicle model years and factory brake controller socket compatibility to ensure a proper fit.