Wire Harness for Installing a New Radio into a Honda, Civic, 1999, 2000 Stereo wire harness for installing a new Radio into a HONDA CIVIC 99, 00 CarXtc wire harness plugs directly into a CIVIC and the wires match up to the same wire colors on your aftermarket radio Plugs directly into your vehicle radio harness, no cutting or trying to figure out what each of the wires do.