Test electric fan circuit with test lamp

How to easily test a relay: • Cómo probar FÁCILMENTE...
The car's engine electric fan is controlled by two relays, a fuse protects the circuit and the car's computer activates one or the other of the two relays depending on the engine's temperature.
If the engine temperature is very high (100 degrees Celsius) then the high speed electric fan is activated while if the temperature is higher than 90 degrees Celsius the low speed relay is activated, for example when the car is stopped in slow traffic. in the city.
Connect one terminal of the 12V 30W lamp to the Battery Positive, the gold terminal of the lamp is used to test the two terminals of the fan connector, so the fan will be turned on in one position.
Then we must locate the electric fan fuse and test it with the lamp.
We also look in the cover of the engine fuse box, we look for the relay contact terminals and with the test lamp we connect its terminals instead of the relay terminals and the fan and lamp should turn on.
With this we have tested the elements of the electric fan circuit.