99 civic wiring harness | eBay Find great deals on eBay for 99 civic wiring harness. Shop with confidence. Skip to main content. eBay Logo: 99-00 Civic OEM radio dash wiring harness loom factory # 32117-S04-C122 EX A/T See more like this. 2011 Select Acura / Honda Speaker Wiring Harness See more like this. 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.