General purpose Automotive Change-Over Relay and connecting Pigtail combine to form a working unit. Change-Over Relay switches current from one user to another, such as opening and closing power windows. Can be used as a normally closed relay or a normally open relay. The 5 terminal SPDT Relay includes a resistor for voltage spike protection. A durable housing with mounting bracket is clearly marked with wiring diagram. Pigtail contains five 14 Gauge wire leads for an easy splice into current wiring harness.