TK30010 – IP WIRING HARNESS – Copo Parts Direct description. instrument panel wiring harness. intended to be used in conjunction with tk30015 chassis wiring harness, tk30017 gauge kit and tk30001 switch panel assembly. What is a Wiring Harness? (with pictures) - wisegeek May 29, 2019A wiring harness is a wiring configuration designed for specific wiring devices. This harness provides a single connection point for multiple wires. Wiring is a complicated process that typically requires training. Most wiring specialists are patient and organized individuals because this is a meticulous, time-consuming job.