The 7-Way Connector Plug – Round Blade – Trailer End | HD is a high-performance plug-only replacement designed for seamless trailer-to-vehicle electrical connectivity. Ideal for replacing worn or damaged 7-way plugs, this unit ensures dependable transmission of brake, turn signal, lighting, and auxiliary functions across a variety of trailer types.
Detailed Information:
Connector Type
7-Way Round Blade
Application
Trailer End & Vehicle End
Function
Replaces standard 7-way trailer plug
Material
Heavy-Duty Plastic and Metal Contacts
Compatibility
7-Blade Trailer Wiring Systems
Fitting:
Designed to replace the 7-way connector plug at the trailer end. Compatible with most standard towing setups including cargo, utility, and equipment trailers. Installs easily without splicing or special tools.
Features:
Reliable Connection: Maintains a secure electrical link for lighting and brake systems.
Heavy-Duty Build: Built to resist impact, weather, and corrosion during rugged use.
Plug-and-Play Design: Direct replacement for damaged or worn plugs—no rewiring needed.
Universal Fit: Works with all standard 7-way trailer wiring harnesses.
Corrosion-Resistant Contacts: Prevents electrical shorts and ensures long-term performance.
Interchangeable Part Numbers:
9338-77
Product Overview:
The 7-Way Connector Plug – Round Blade – Trailer End | HD is engineered for reliable trailer connectivity, replacing broken or unreliable plugs with ease. With rugged construction, corrosion-resistant contacts, and universal 7-way blade compatibility, it’s a dependable solution for trailer lighting, braking, and auxiliary systems. Perfect for utility, equipment, and cargo trailers requiring high-performance and lasting durability.
We want you to be completely satisfied with your purchase. That’s why we offer a hassle-free return policy within 30 days of delivery*. If your item is unused, in original packaging, and eligible for return, you can send it back for a refund or exchange.
*Some exclusions may apply
Some of our products are backed by a 1-year limited manufacturer warranty covering defects in materials and workmanship under normal use. If you experience any issues during this period, we’ll work with you to repair, replace, or resolve it according to warranty terms.*
*Proof of purchase required
Need it fast? We’ve got you covered. Orders confirmed before 3 PM Eastern Standard Time (Monday–Friday) are processed and shipped out the same business day. Orders placed after the cutoff will ship the next business day.
Compared to dealer parts, this is half the price but just as good. Metal contacts are clean and conductive. Housing is impact-resistant and locks securely. Will keep spares on hand.
M
Mel Danks
Universal Fit, No Compatibility Issues
Works perfectly with my 2018 F-250 and 16-foot utility trailer. No adapter needed. All circuits—brakes, turn, reverse, aux—came through first try. Simple and effective.
F
Flem Pietzke
Perfect Fit for My Equipment Trailer
Needed a direct replacement for a 9338-77 plug. This matched exactly. Metal contacts are thick and resist corrosion. I appreciate that it’s plug-only—saved me from rewiring the whole harness.
P
Pedro Sanchez
Exactly What I Needed – No Hassle
Replaced a brittle, cracked plug from a big-box store brand. This one feels industrial-grade. Contacts haven’t corroded, and the fit with my tow vehicle is solid.
K
Kyle Faunch
Good Quality, But Pins Slightly Tight
Some blade connections required a firm push to seat fully. Once connected, though, the lock stays secure. No electrical dropouts during long hauls. Worth the price.
