Water Temperature Monitoring in my Ford Fiesta

Back in the sands of time, I owned an Alfa Romeo 159. Beautiful car, but it overheated on the day I bought it. The dealer that sold it to me was not interested in helping me get that resolved, and so it was down to me, a young guy with no money to get it sorted out and back on the road. Since then, I've watched every water temperature gauge in every car I've ever driven like a hawk! But in the Fiesta, a basic model of car, there is no water temperature gauge fitted as standard. The Fiesta's cloc