Aeroflow universal wiring harnesses complete with fuse box, relays and fuses. Each wire is colour coded and labelled every 6 inches ( 1524mm ) for the entire lengthto allow ease of installation in any car, hot rod or race car. This 12 circuit wiring harnesses will wire up heater,air conditioning , wiper motor, various accessories, turn/hazard signal, relay output, brake switch, instrument cluster and one spare circuit. The included fuse box is small and compact which can be installed anywhere and hidden away from prying eyes.