Gaogsiy Trailer Brake Harness for Ford F-150 & Super Duty (2009–2023) — 7-Way + 4-Pin, IP65 Weather-Resistant

Gaogsiy Trailer Brake Harness Towing is a plug-and-play 7-way and 4-pin wiring connector designed to restore trailer lights, brakes and power on compatible 2009–2023 Ford F-150, Super Duty and select Ford vans and SUVs.

This replacement harness combines ABS housing, brass/copper contacts and an IP65 rating to deliver a durable, weather-resistant connection for trailers, cargo boxes and RVs. It ships as a direct-fit substitute for OE numbers 9U5Z-14489-MAA and FU5Z-14489-A and is intended for quick installation without splicing—check fitment details before ordering to ensure compatibility with your Ford model and year.

Will this harness work with my Ford truck or van?

The Gaogsiy harness is engineered for many Ford models from 2009 through 2023, including F-150, F-250/F-350 Super Duty lines, E-Series vans, Transit models, Expedition, Navigator and Mark LT where the OEM connector matches. Confirm your vehicle year and the OE part number shown to avoid misorders.

• Fits listed models: 2009–2019 E-150/E-250/E-350/E-450; 2009–2019 F-150; 2009–2016 F-250/350/450/550 Super Duty.
• Also fits 2015–2019 Transit-150/250/350 and 2015–2023 Transit-350HD.
• OE replacement numbers: 9U5Z-14489-MAA, FU5Z-14489-A—verify before purchase.

How is the harness constructed for durability and performance?

Gaogsiy uses an ABS plastic shell for dimensional stability and toughness, paired with brass/copper contacts that resist corrosion while maintaining strong electrical conductivity. The assembly carries an IP65 rating, offering dust protection and water resistance for roadside and towing conditions.

• Housing: impact-resistant ABS for long-term fit and weather tolerance.
• Contacts: brass/copper for reliable signal and power transfer.
• Rating: IP65 dustproof and water-resistant sealing for outdoor use.

What connections and trailer types can I plug into this harness?

This unit includes a standard 7-way (shovel-shaped) connector and a 4-pin flat plug, covering most common trailer light, brake and auxiliary power needs. It supports a wide range of towed equipment from small trailers to cargo boxes and many RVs, simplifying hook-up at the hitch.

• 7-way: supports brakes, turn signals and auxiliary circuits.
• 4-pin: basic running lights and turn signals for smaller trailers.
• Compatible with most trailers, cargo boxes and RVs that use these connector types.

How easy is installation and what should I check before buying?

Installation is plug-and-play—no cutting or splicing required when your vehicle matches the harness type and OE reference. Before installing, visually compare the connector shape and OE number to your factory harness to ensure an exact fit, and consult vehicle wiring diagrams if necessary.

• Method: plug-and-play replacement for straightforward swap-in.
• Pre-purchase check: confirm vehicle model/year and OE part number match.
• Support: Gaogsiy offers up to one year of product service—contact via email for questions.

Who is this for? The Gaogsiy Trailer Brake Harness suits owners and mechanics who need a reliable, OEM-style electrical connector for towing with Ford F-150, Super Duty trucks and compatible vans or SUVs. It’s ideal for those who want a weather-resistant, ready-to-install replacement to restore trailer lighting, braking signals and auxiliary power without custom wiring. If you tow frequently or are preparing a vehicle for towing duties and the OE numbers match, this harness provides a durable, low-friction solution.