After changing out a leaking water pump I noticed that my cooling fan down
at the radiator did not come on for some time even when the temperature got
to around 200* F (It did not get higher than this even after taking the car
for a spin for about 15 minutes).  200* is an estimate off of the dashboard
gauge.

I jumpered the fan to the battery and the motor engaged immediately.  I also
checked the relay in the fuse box and it checked fine (Haynes manual says
there are three but I only have one and there are no other connectors in the
block). I did not check is the temperature sensor (aka thermistor) nor did I
run an OBD I scan.

Can anyone explain to me the operating parameters of the cooling fan and can
anyone give me any thoughts as to my problem or lack of one?

Thank you,

CD