Car Stereo Wiring Harness - scosche Our stereo wiring harness kits are the best in the industry and ensure an easy and clean car stereo installation. Our extensive car stereo wiring harness collection ensures that you will find the exact harness needed for you car. Home | E Z Wiring | Florida USA At EZ Wiring, we strive to bring you the best harness for the best price. Our harnesses are universal and can fit just about any application. We use top quality gxl cross linked polyethylene jacketed wire to resist heat, oil and water. Every wire in each kit is labeled every 5 inches to make your installation as easy as possible.