LLANNDER Trailer Brake Harness for Ford F-150 / F-250 / F-350 2015–2023 — 7-pin Round & 4-pin Flat, Weatherproof

LLANNDER's trailer brake harness is a direct-fit, OEM-style dual 7-pin round and 4-pin flat connector that replaces FU5Z-14489-A for compatible Ford F-150, F-250/F-350 Super Duty, Ranger and F-150 Lightning models.

This harness provides a compact, weatherproof towing connection that restores complete trailer lighting and brake control without cutting or splicing factory wiring. Built with ABS impact-resistant housing and pre-coated copper terminals, the assembly combines the convenience of both 7-pin round and 4-pin flat outlets in a single plug-and-play unit. It’s designed to match the vehicle’s original mounting and electrical pinout for a fast swap-in replacement.

Will this harness fit my Ford truck or Ranger?

Yes — the LLANNDER harness is engineered to match the OEM specifications for specific model years and trailer tow packages. Confirm compatibility by matching your vehicle year and trailer-tow package to the listed models before ordering.

• Compatible models: 2015–2023 Ford F-150 with Trailer Tow Package and 2022–2023 F-150 Lightning (BEV)
• Also fits 2019–2023 Ford Ranger with Trailer Tow Package
• Fits 2017–2022 Ford F-250 and F-350 Super Duty with Trailer Tow Package
• Replaces factory part numbers: FU5Z-14489-A, FU5Z14489A, 9U5Z-14489-MAA, 9U5Z14489MAA

How easy is installation and what tools will I need?

Installation is designed to be plug-and-play and typically requires only basic tools and a few minutes of time. The harness plugs into the factory mating connector without splicing; mounting hardware aligns with the original bracket points for a seamless replacement.

• No cutting or splicing of factory wiring required—perfect-fit OEM connector
• Basic hand tools recommended: ratchet, sockets, and a trim tool for access
• Pre-coated copper terminals ensure reliable electrical contact right away
• Includes a weatherproof dust cover to protect connectors during storage

What features protect the connection from the elements and road use?

The harness is built to withstand daily towing conditions with materials chosen for durability and reliable electrical performance. Weather sealing and impact-resistant housing reduce the chance of corrosion and damage from debris or moisture.

• ABS impact-resistant housing guards against road damage
• Pre-coated copper terminals resist corrosion and improve conductivity
• Weatherproof dust cover shields unused connectors from moisture and dirt
• OEM-style fit reduces stress on wiring and mounting points

What towing setups does the dual 7-pin/4-pin design support?

The combined connector eliminates the need for multiple adapters by offering both modern braking circuits and standard lighting feeds in one assembly. This makes switching between different trailer types faster and reduces cable clutter at the receiver area.

• 7-pin round supports electric trailer brakes, auxiliary power, and reverse/backup circuits
• 4-pin flat covers basic tail, brake, and turn signal lighting for utility trailers
• Dual-system design removes the need to carry separate adapters
• Works with factory trailer brake controllers and vehicle wiring systems

Who is this for: The LLANNDER Trailer Brake Harness is intended for Ford owners who need a reliable, OEM-style replacement for a worn or damaged trailer connector. It’s ideal for truck and Ranger drivers who tow RVs, utility trailers, horse trailers, or campers and want a straightforward, weatherproof solution that restores factory functionality without wiring modifications.