The fan should turn freely with no resistance when turned by hand. It will only operate in a over heat condition sensed by the cylinder head temp. sensor which then sends a voltage change to the PCM (Powertrain Control Module) which will then make the necessary changes to the engine operation including turning on the cooling fan. Just idling with the AC on will not do it if the ambient temp sensor & the cabin temp sensor are telling the PCM all is operating okay.Can anyone tell me how to determine when the cooling is running and at what speed. Is it a two sped fan, the car is a 2003. Mine never seems to kick on no matter how long I let it run in the garage.
Yep Yep got a scar across the pointer finger of my left hand. About 20 yrs ago I was helping a buddy change the lower radiator hose on his mid 70's Ford truck. I was leaned over the fender, arms all the way down in the engine bay, when a screwdriver rolled off from the dumb place I had set it down and arced across the contacts on the solenoid. Thankfully the engine did not fire, or I would probably be missing fingers but it did make a forceful about 3/4 rotation. the Fan knocked my hand out of the way and took off a good chunk of skin, leaving this scar as a reminder Lesson learned!This shouldn't be done when there is power to the fan to avoid losing your hand.