Wiring Harness - Learn More About Scrap Metals Wiring harnesses are found in electrical parts of cars and the Wiring Harness Scrap Prices vary from different scrap yards. A wiring harness contains a lot of wiring covered by a heavy plastic. You could make more money by stripping these wires to get the bare bright copper prices. Prices for wiring harness’s depend on where you scrap them Wire Harness - Where to Sell, Prices, Grades, ISRI Specs Wire Harness scrap is accepted by all scrap yards in general. It could be sold as-is. However, the heavy plastic covering may lead to low price quotes by the yards. An alternative way to earn more from these scrap is to strip these wires, by removing the plastic covering. The removal of plastic insulation would allow for recovery of copper.