Nissan Genuine OEM Relay 25230-79945 (1 Relay)

in this video we're gonna be talking about how to diagnose a faulty relay lot of vehicles are different but most of the time you find the relays right where the fuses are so these big boxes these are relays these smaller ones are relays also and then these are fuses even these are fuses so here's a common four prong relay and on the side of it most of them have a little key that explains the wiring diagram for the relay and the little pins are numbered on the bottom and this picture represents how this really works so these two terminals represent 86 and 30 and there is battery positive on those terminals all the time and then the other two terminals this terminal represents 87 and this terminal right here represents 85 we'll talk more about the numbers later we're using a horn circuit because it's very simple it's easy to understand what we have is we have the horn grounded on this sid