Car Stereo Radio Wiring Diagram - 1992 Honda Civic Whether your an expert installer or a novice enthusiast with a 1992 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 1992 Honda Civic. 1992 Honda Civic OE Wiring Harnesses & Stereo Adapters Honda Civic 1992, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler.