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 Processing Wire Looms and Harnesses - jmcrecycling Home / Processing Wire Looms and Harnesses The wiring looms of scrap vehicles weigh 10kgs on average, so there is clearly money to be made from their removal and recycling. Rather than sell the whole looms on, recovering and granulating the copper cable can increase your yard’s profit by approximately 50%.