CURT Quick Plug trailer brake controller wiring harness — Ford/Lincoln Super Duty, 12‑ga plug-and-play

This CURT 51436 Quick Plug wiring harness gives you a fast, reliable way to install or replace the connector between your vehicle and a CURT electric trailer brake controller. It is a vehicle-specific adapter designed to mate with the OEM brake controller socket on select Ford F‑Series Super Duty trucks, F‑150, Expedition, Flex and compatible Lincoln models so installation is completed in minutes. Constructed with 12‑gauge wire and a protective slit‑loom sleeve, the harness balances durability and convenience for towing setups that require electric trailer brakes.

How does this harness make brake controller installation faster?

Because the harness uses the factory vehicle socket, there is no need to strip, cut, or splice factory wiring. One end plugs directly into the OEM brake controller connector and the other plugs into any CURT controller with a Quick Plug interface, so most installs are tool‑light and quick.

• Vehicle‑specific plug matches factory socket for a direct fit
• No cutting or splicing preserves factory wiring integrity
• Includes zip ties for a neat, secure routing under dash
• Approximately 24 inches of cable for flexible controller placement

What vehicles and CURT controllers is this adapter compatible with?

The 51436 Quick Plug is built for select model years of Ford and Lincoln vehicles—check the fitment list for exact years and models. It works with CURT brake controllers that use the Quick Plug connector type, including proportional, inertia and time‑delay styles, making it suitable for replacement installs or new controller additions.

• Fits designated Ford F‑150, F‑250, F‑350, F‑450, F‑550 Super Duty applications
• Also fits Ford Expedition, Flex and Lincoln MKT, Navigator where specified
• Compatible with most CURT brake controllers using the Quick Plug connector
• Ideal for both new installations and replacing existing CURT harnesses

How durable and reliable is the wiring harness during regular towing?

CURT builds the harness with 12‑gauge conductors to maintain consistent power delivery to the brake controller and trailer brakes. The wires are bundled inside a slit‑loom sleeve to resist abrasion and crushing, while the connector and cable length support clean routing and long‑term reliability.

• 12‑gauge wiring ensures steady current for accurate brake control
• Slit‑loom sleeve resists wear from vibration and contact points
• Zip ties included for secure, out‑of‑sight installation under the dash
• Factory‑style connector reduces risk of loose or intermittent connections

What should I consider before buying this harness?

Verify your vehicle’s model year and OEM connector type against the product fitment to ensure compatibility. If your CURT brake controller lacks the Quick Plug interface or your vehicle isn’t listed in the fitment guide, this harness may not be the correct option.

• Confirm vehicle and model year match CURT fitment information
• Ensure your CURT controller uses a Quick Plug connector
• Measure installation space—24" cable allows flexible controller mounting
• Use as replacement or for new controller installations only

Who is this for? The CURT 51436 Quick Plug harness is aimed at truck and SUV owners who tow trailers equipped with electric brakes and want a fast, factory‑style connection for a CURT brake controller. It suits do‑it‑yourself installers who prefer a plug‑and‑play approach, fleet operators seeking consistent replacement harnesses, and anyone who wants to preserve original vehicle wiring while adding or replacing a brake controller.