radiator fan stopped working

[Mark Fearer <mfearer@xxxx>]

 Hello. My radiator fan recently stopped working. It used to kick on in
traffic or when parked when the engine reached a certain temperature. Now,
because the fan is no longer working, the car is okay as long as it is
moving, but overheats when sitting still. I suppose that I could hard wire
the fan to a toggle switch. Before I do that, though, what should I look
for? Fuse? Relay? Thermostat? How does the fan system work? I hope it is
not that sensor.

Mark Fearer
vin 3072
Manchester, New Hampshire