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See more product details Black-Ground (Pin 85) Red-Positive (Pin 30) White-To switch(Pin 86) Blue-To light/Accessory (Pin 87) Green-Pin 87a Suits for all automobiles and devices equipped with a 12 Volt DC power source. Used in led work light, fog lamps, starter, wiper, fans, speakers, central locking, alarm, electric windows, etc. The relay socket comes with colored markings to facilitate the wiring of accessories and make the installation easier and more convenient. The automotive relay is an electronic control device, usually used in an automatic control circuit. It is in fact an "automatic switch" that controls a large current through a small current. It has the function of automatic adjustment, safety protection, and conversion circuit.






