Where is it?Is it on the left side between the rear two spark plugs?Or is it on the right between the two front spark plugs?Thanks in advance.

 

Fan Switch is on the passenger side cylinder head.
Temp Gauge Sender is on the Driver's side cylinder head.
Coolant temp sensor is on the intake manifold, next to the thermostat housing.
.....At least that's where they are on my 92 RS.
-Rich-

 

Here's a picture. It's on the passenger side between the last two spark plugs.