Product Overview
The Sealco FB48 3940 is a complete 48-foot trailer wiring harness assembly designed for heavy-duty commercial trailers.
It provides a pre-terminated, plug-and-play electrical connection for brake lights, turn signals, ABS, and auxiliary circuits, ensuring quick installation and consistent performance.
Built with durable thermoplastic jacketing and sealed connectors, the FB48 3940 harness resists moisture, corrosion, and abrasion — ideal for flatbeds, tankers, dumps, and refrigerated trailers operating in harsh conditions.
Compatible with standard 7-way systems and DOT-compliant for highway use.
