There is nothing worst then getting stuck in traffic in the Fiat and watching the temperature gauge slowly move past the 190 mark. Will the traffic break up before the head warps? Will the fan ever come on and if it does, how will you ever hear it with all the traffic noise?
I have two solutions.
I put a small jewel light in the dash wired to the cooling fan. When the fan comes on the light glows red. This will make me feel that all is right with the world and I can relax in the knowledge that the Fiat is functioning as designed. If I had not noticed that my Spider was getting a little hot, the light brings me to my senses and start checking my gauges. A secondary benefit from this is a speed warning. As I drive at speeds above 65-70 the same light starts to glow dimly. The faster I go the brighter it gets. Air that is forced through the radiator starts to turn the fan due to higher air pressure. The fan, as it turns faster and faster , acts as a generator to cause the light to glow. If I slow down the light goes out.
Of course, the radiator fan switch has been known to fail and not turn on the fan, usually during the worst traffic jams. You are stuck in more ways then one. I put a small rocker switch in the radio console. It is wired to the grounding wire of the radiator fan switch (the switch at the base of the radiator). It acts as a override for the radiator fan. I can turn on the fan whenever I want to supply extra cooling even if the radiator switch decides not to work. This does not interfere with normal automatic operation.