re. radiator fan does not stop

[Swann, Benjamin R. (BSWANN)]

[Looking for help regarding by radiator fan on an 1989 100.  The fan 
will not stop running even when the car is off for over 15 min.  I 
had to disconnect the battery to keep it from draining.  I though it 
might be the temp sensor or relays so I checked the shop manuals 
which indicated that there are three relays that control the fan, two 
in the main relay box and one in the auxiliary relay box.  With the 
battery connected but the key not in the ignition the fan runs even 
if I unplug the temp sensor (bottom left of radiator) and either 
relay in the primary relay penal.  So I tried to find the auxiliary 
relay panel behind the lower dash underneath the steering wheel. 
Well I found the relay panel but there was no fan relay in position 7 
as the manual says.  So my question is now what?  I would appreciate 
any help.]

Ron,

See if the fan stops when you disconnect the radiator switch connector
located at the bottom of the radiator.  If so, then that is bad.  I had the
same thing happen - bad switch.

Ben