Are both radiator fans supposed to run simultaneously?

[surel0ser]

So when my radiator fans kick on only one starts and then right before it shuts off the second one kicks on for about 5 seconds. To me this seems pointless and makes me think the fan is bad or there is a short. Is this common or is my assumption right?

 

[Bostedquest]

So when my radiator fans kick on only one starts and then right before it shuts off the second one kicks on for about 5 seconds. To me this seems pointless and makes me think the fan is bad or there is a short. Is this common or is my assumption right?

One is for normal cool down. The other is for when the A/C is on.
So yes, if the car is warm, and you turn on A/C or the A/C Compressor pressure cycles, both will come on for a few sec.