A relay is like a high-load capable switch. You generally have a common terminal (fused power from the battery), two coil terminals (when 12 volts and ground are present, one at each, then the battery power connects to the last terminal): the N.O. terminal. So the common and N.O. terminal connect when there is 12 volts going to one coil and ground to the other. We wont go into the NC terminal on some relays as it generally does not apply to fans.JerryDaugherty said:Wut does a relay do? Where does it go and ****?
Its not your fault but...HISSIN50 said:A relay is like a high-load capable switch. You generally have a common terminal (fused power from the battery), two coil terminals (when 12 volts and ground are present, one at each, then the battery power connects to the last terminal): the N.O. terminal. So the common and N.O. terminal connect when there is 12 volts going to one coil and ground to the other. We wont go into the NC terminal on some relays as it generally does not apply to fans.
A slightly different relay is your starter solenoid. A tiny wire comes from the ignition, through starter interlock devices, and goes to the solenoid (this is the tiny slide-on wire which is at the top of the solenoid). WHen it gets 12 volts, it connects the common and N.O. terminals (the battery lug and starter cable, respectively). Same idea - use a small switch and wire to control a relay which does the 'heavy' work. Most folks do the same with their fans.
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