Relays specification:1. Brand new heavy duty SPST relays2. 12 Volt 60 amp 4-Pin relays3. Mechanical life of 10,000+ cycles4. High 60A coil capacity- able to handle those high current applications with ease5. Hundreds of uses include- starter kills, dome light supervision, trunk release, polarity change, power door lock/actuator control, change a low current output to high current, add ignition/accessory outputs, control motors/other electronics, It is Also suitable for automobile used for control, alarms, horn, headlight and more....Vehicle Electronics' Relays are designed and manufactured to meet or exceed original equipment manufacturers' specifications for performance and durability.Multi-Purpose Relays are used to control electrical circuits for components on a vehicle that have a high amperage load such as headlights, fuel pumps and cooling fans.A malfunctioning or inoperative Multi-Purpose Relay will cause a component to not function or function intermittently.Depending on which circuit is affected, a failed Multi-Purpose Relay could cause a no-start condition, proper vehicle operation and impaired safety systems. When diagnosing a failed Multi-Purpose Relay the corresponding fuse should be checked as well as verification that the amperage draw of the component on the circuit is within factory specs