Car Stereo Radio Wiring Diagram - 1999 Honda Civic Whether your an expert installer or a novice enthusiast with a 1999 Honda Civic, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 1999 Honda Civic. 1999 Honda Civic Car Stereo Wire Colors and Locations Disclaimer: * All information on this site ( the12volt ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.