12v Fan Relay Diagram. Looking at the diagram we see the pinout of a typical 12v relay. The correct way to wire an electric fan rx7club mazda.
Keep in mind that pin 87a and pin 30 will have continuity when the relay is not energized. There are different kinds of relays for different purposes. Pin 86 30 will be constant 12v pin 87a will go to the device that you want to power up all the time.
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The orange wire on the relay should see a 12 volt signal when the ignition switch is each relay will control a single fan and a 30 amp fuse is recommended for each as you can see from the diagrams above and below its really a simplein most installations a 30 amp relay from radio shack auto relay cat. Dc fan sd control using thermistor simple temperature controlled wiring between arduino and the 12v controller circuit how to of a red regulator diagrams. If the coil is not activated 30 will always be connected to 87a. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on.