Grote 67581 56” Blue Drop Auxiliary Harness – Male-Pin Ultra-Blue-Seal® Rear Sill Option

Reliable Power Delivery for Auxiliary Trailer Systems The Grote 67581 is a specialized 56-inch "Blue Drop" harness designed for auxiliary power distribution within the Ultra-Blue-Seal® (UBS) Rear Sill system. Engineered for heavy-duty commercial use, this harness provides the critical link for auxiliary circuits—often used for ABS power or constant-power requirements—ensuring consistent electrical performance across the entire trailer.

Advanced ULTRA-BLUE-SEAL® Moisture Protection Trailer rear sills are high-corrosion zones where road spray and salt can quickly degrade electrical integrity. The 67581 is built with Grote’s patented Ultra-Blue-Seal® technology, featuring a factory-molded Male-Pin plug that creates a permanent, weather-tight barrier. This "Sealed Plug-In" design stops moisture from wicking into the wires, effectively eliminating terminal corrosion and preventing circuit failure.

Heavy-Duty Construction and Reach With a 56-inch total length, this harness offers ample slack for organized routing through trailer frames and protective conduits. The specialized blue wire insulation and blue-coded connectors make identification easy during installation and maintenance. Constructed with premium GPT wire, the 67581 is built to resist vibration, chemicals, and the mechanical stress of long-haul trucking.