CURT 56148 - WIRE HARNESS 12-21 NV1500/2500/3500CURT 4 FLAT CUSTOM WIRING ; 12 21 NISSAN NV1500 2500 3500 Plugs into vehicle tail light assembly to provide a 4 way flat socket Simple plug and play design eliminates the need for cutting or splicing 4 way flat output connects tail lights, brake lights and turn signals Equipped with tail light converter for vehicle trailer compatibility Constructed with SMT circuitry for better performance and durability Dust cover included to keep connector clean