- its normal to easily stop the fan blades (with a finger) when engine running ....... minimal resistance .
There are tests but they are not simple.
1. cooling fan ECU -under glovebox
2.coolant temp sensor(inlet, pass. side motor)
3.solenoid valve(rear of power steering pump)
I would find someone who knows how to check these ,starting with the ones in the engine compartment first. Why do you think there is a problem with the fan?
I replaced the radiator, both hoses, thermostat, cap, but it doesnt over heat all the time, so I figure its not the water pump, whats left?