Grote 66163 - 12' 8" Slim-Line Under Light Male to Slim-Line Double Female Jumper Harness

Extended Reach Power Distribution for Heavy-Duty Trailers

The Grote 66163 Jumper Harness is a professional-grade wiring extension designed for long-distance power delivery within a trailer's electrical system. Measuring an impressive 12 feet 8 inches (152") in length, this harness provides the necessary reach to connect front upper clearance markers or side markers directly from a front receptacle. By offering a single, continuous run of high-quality wire, the 66163 eliminates the need for multiple intermediate connections and unreliable manual splicing.

Precision "Y-Split" Connectivity

Engineered for "plug-and-play" efficiency, this harness features a specialized configuration of one Slim-Line .180" Male Bullet to two Slim-Line .180" Female Receptacles. This "double-female" design acts as a high-capacity power splitter, making it the ideal choice for:

• Front Upper Clearance Lights: Effortlessly reach the top rail from the front trailer bulkhead.
• Multiple ID Lamp Arrays: Power multiple identification lamps from a single source.
• Auxiliary Drop-outs: Access and extend power from rear sill harnesses or main harness drop-outs.
• System Integration: Fully compatible with the Grote 66190 marker lamp harness series.

Industrial-Grade Durability

Built for the long haul, the 66163 is constructed with rugged 14-gauge GPT wire. The factory-molded Slim-Line connectors provide a compact, low-profile design that is easy to route through tight header rails or internal trailer channels while maintaining a watertight, vibration-proof seal. Designed to resist road salt, chemicals, and extreme temperatures, this harness helps reduce maintenance downtime and ensures your fleet stays safe and FMVSS 108 compliant.