Cooling fan in Engine bay function?

[redtide]

I see that the radiator fan and the small cooling fan on the engine bay are attached to one thermo sensor in the water passage housing.
I know that when it reaches a certain temp, this sensor sends a signal to the fans to switch on. But how come only the radiator fan switched on? The small fan did not.
I did try to ground the socket and both switched on but during normal operation, the small one on the side of the engine remained of.
The question is, when should this fan switch on? What should trigger it? Does the aircon play a role in this?
Thanks

 

[EdinKali]

That fan rarely comes on. I think it is only triggered when the engine bay temp reaches a certain level.

 

[Briank]

It only comes on when the coolant is above I think 195F which is very hot. It is really of no use because it was omitted on later year cars.

 

[redtide]

Thanks much for the info.

 

[alum04org]

See this thread for other info on this fan -

http://nsxprime.com/forum/showthread.php?t=101578


:smile: