Simple Guide on Color Code Car Stereo Wiring Diagram. Know what color wire goes where in a typical car stereo / head unit.. The 04 Elantra stereo wiring diagram adheres to standard color coding, which makes it easy to identify the wires and circuits. For example, the black wire works as either ground or the earth connection, while the red wire indicates a constant 12V+ connection which powers a variety of accessories.
Our comprehensive 2004 Hyundai Elantra radio wiring diagram shows all the radio wire harness colors, speaker wire colors, and speaker sizes. Use this head unit pinout guide to help with your car stereo installation or to troubleshoot radio wiring issues in your 2004 Hyundai Elantra.. Our comprehensive 2004 Hyundai Elantra Hatchback radio wiring diagram shows all the radio wire harness colors, speaker wire colors, and speaker sizes. Use this head unit pinout guide to help with your car stereo installation or to troubleshoot radio wiring issues in your 2004 Hyundai Elantra Hatchback.