Yinaolan OE-Style 7-Blade and 4-Flat Trailer Plug with Mounting Bracket – 40974 Direct-Fit, Weather-Resistant

This heavy-duty wiring connector is built to match original-equipment fit for many trucks and SUVs, providing a combined 7-pin blade and 4-flat output in one compact assembly. The package includes the 40974 multi-tow connector, a stamped mounting bracket, and installation screws so you can swap out an old or damaged plug without splicing. Designed for everyday towing, the connector uses spring-sealed covers and corrosion-resistant terminals to keep contacts dry and dependable.

Will this connector fit my truck or trailer harness?

It is engineered as an OE-style replacement compatible with several factory wiring systems. The unit is listed as a direct substitute for part numbers like fu5z-14489-a and 9u5z-14489-maa and fits many Ford models plus a wide range of domestic and import trucks and SUVs.

• Direct fit for many Ford pickups (F-150, F-250, F-350, F-450) and other common models
• Works with trailers that accept a 7-blade and 4-flat combined connection
• Mounting bracket aligns with standard bolt patterns for easy swap

How simple is the installation for a typical DIYer?

The connector is a plug-in-style kit intended for rapid replacement with minimal tools. Remove the old plug, fasten the supplied bracket to your trailer hitch or bumper, align the connector, and secure it with the included screws; no advanced wiring or cutting should be necessary when replacing an existing OE-style connector.

• Comes with bracket and mounting screws for one-step bolting
• Plug-and-play design avoids wire splicing in most swaps
• Instructions are straightforward for users familiar with trailer plugs

How does the connector resist weather and corrosion?

Sealing features and spring dust covers help shield electrical contacts from moisture, dirt, and road debris. Corrosion-resistant terminal surfaces maintain conductivity over time, reducing the chance of intermittent lighting or brake signal failures when towing in wet or dusty conditions.

• Flip-cover keeps out rain and road grime when not in use
• Spring dust covers protect individual terminals from corrosion
• Rugged housing materials resist impact and UV exposure

What comes in the box and what warranty is offered?

The kit ships with the 40974 multi-tow 7-blade and 4-flat connector, one stamped mounting bracket, and two mounting screws—everything needed for a direct replacement. Yinaolan supports the product with a one-year warranty and customer service response aimed at resolving issues promptly.

• Included: 7-blade + 4-flat connector, bracket, screws
• One-year limited warranty from the manufacturer
• Customer support promise to handle issues within 24 hours

Who is this for: This connector is intended for vehicle owners, fleet managers, and mechanics who need a reliable, factory-style replacement for a combined 7-pin and 4-flat trailer plug. It suits anyone replacing a worn or damaged OE connector on pickup trucks, SUVs, or trailers who wants an easy, bolt-in solution with weatherproofing features and a backed warranty.