RRR I agree with you about them being wired that way, even oems do it but I never figured out why. I get the heat soak, but all that is cooled is the rad core. If there was a water pump to circulate during the same time it would make sense.
Maybe it's to blow air over the engine compartment????
You're trying to put it in separate little boxes. It's for all of it. To help get the extra heat out of everything after the engine is cut off. That said, vehicles with a solid fan don't turn the fan after shutoff, so it won't hurt anything I guess.
