Aeroflow universal wiring harnesses complete with fuse box, relays and fuses. Each wire is colour coded and labelled every 6 inches ( 152mm ) for the entire length to allow ease of installation in any car, hot rod or race car. This 21 circuit wiring harnesses will wire up radio, ignition coil, headlights, horn, wiper switch, heater/air conditioning, turn/hazard switches, fuel pump, instrument cluster, ignition/accessories and one spare circuit. The included fuse box is small and compact which can be installed anywhere and hidden away from prying eyes.