HORN, Horn Wiring Diagram for Nissan Sentra 1990, List of elements for Horn Wiring Diagram for Nissan Sentra 1990:, Fuse block, Fuse r 10a, Horn, Horn relay (on right inner fender panel), Horn switch, Hot at all times, Nca, , , COOLING FAN, DEFOGGERS, RADIO, HORN, POWER DOOR LOCKS, STARTING/CHARGING, POWER WINDOWS, WIPER/WASHER, ,