30 AMP 12 VOLT RELAYS Relays and sockets are used for many car electronic applications to turn on/off almost any device. They are also used when a device draws heavy amperage such as car alarms, remote starts, HID headlights, pop doors, trunk releases strobe lights, fog lights, stereos, fans, air horns, and much more. 30 AMP RELAYS 12 VOLT CAR ALARM RELAY SPDT 12V BOSCH STYLE AUTO CAR ALARMS