What do you do if the cooling fan on your 1998 Ford Escort will not cut off even when the ignition is switched off and runs until the battery is dead?

What do you do if the cooling fan on your 1998 Ford Escort will not cut off even when the ignition is switched off and runs until the battery is dead?
Escrt FanCheck for a shorted fan switch
I fixed this today 3-2-2011----I chnged my cooling fan sensor and sending unit---not sure of the names of the parts --but they screw into the metal pipe just under the distributer (where the 4 spark plugs come together)----they have a small electrical connecter on EACH one and scew in like a spark plug--and are about the size of a spark plug--use a 3/4 inch deep well socket ---this worked for me and my coolant light went out after the second start------I looked all over for a fan relay----there is not one in my 1998 escort-----It must be in the computer. The parts cost me 27$ at auto zone------I took out the air filter housing ( a snap off ring-- no tools needed) and removed the upper hard plastic hose----bent up the remaining rubber corrigated hose and there are the fan sensors---side by side---easy--------good luck and i hope this helps---I looked for hours and got all kinds of answers----this worked for me---no relays--no messing with the computer thing----------