Autozone.com has diagrams and pictures to do most repairs to car. I looked up turn signal replacement for your car (http://www.autozone.com/addVehicleId,2551301/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c152801a9066) and it shows step by step instructions on bulb or assembley replacment for all of your 1999 Corolla lights
