Which fuse blew? What system was affected? Do you really need an entirely new wiring harness?
Autozone does have repair guides free online for many makes/models of vehicles. I have used it with some success since they often provide wiring diagrams. Most auto parts stores carry Haynes manuals but you might be able to find a factory service manual for your Accord on ebay. http://www.autozone.com/shopping/repairLanding.htm