Grote 66070 ULTRA-BLUE-SEAL® (UBS) 7-Way Main Harness – 12" Lead, 10-Pole Connector

The Standard in Corrosion-Resistant Power Delivery

The Grote 66070 ULTRA-BLUE-SEAL® (UBS) Main Harness is the backbone of a reliable heavy-duty vehicle electrical system. Engineered to provide a secure, watertight connection between your power source and vehicle lighting, this harness is part of Grote’s premier UBS system—the most trusted name in the industry for fighting moisture and chemical corrosion.

Superior Protection with ULTRA-BLUE-SEAL® Technology

Electrical failure is most often caused by environmental intrusion. The 66070 features an advanced molded 10-pole plug and a 12-inch lead designed to integrate seamlessly with Grote’s UBS pigtails and distribution modules. The jacketed cable is constructed from high-quality materials that remain flexible even in sub-zero temperatures, ensuring that your fleet stays on the road through the harshest winters.

Plug-and-Play Efficiency

Designed for ease of installation and maintenance-free operation, this 7-way main harness utilizes a standard 10-pole connector configuration. By using a sealed, modular approach, the 66070 eliminates the need for splicing and heat-shrinking, which are common points of failure in traditional wiring. Whether you are outfitting a new trailer or refurbishing an existing fleet, the Grote 66070 provides the "set-it-and-forget-it" reliability that professional operators demand.

• ULTRA-BLUE-SEAL® Construction: Industry-leading protection against moisture, salt, and road chemicals.
• 10-Pole Molded Connector: Provides a secure, weather-tight interface for power distribution.
• Heavy-Duty 12" Lead: Perfect length for connecting to nose boxes or front-of-trailer distribution points.
• Jacketed 7-Way Cable: Durable outer layer protects internal copper wiring from abrasion and environmental stress.
• Modular Compatibility: Engineered to work perfectly with Grote’s entire range of UBS components and modules.