Automotive relays are located throughout the entire electrical system in automotive like 2 & 3 & 4 & 6 Wheelers. They allow a small current flow circuit to control a higher current circuit.
Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a relay contact is normally open (NO), there is an open contact when the relay is not energized.
Automotive relays types are Dual Head lamp Relay, Horn Relay, Melody Maker Relay, Micro Relay & Etc ...