Yesterday when I was driving my 94 wagon around in town, the temperature gauge was up at the top end of the "NORMAL" bracket and the engine seemed incredibly hot. The cooling fan was not running. I know most of you would suspect relays right away (not saying that's not it!) but the fan works just fine when the A/C is on. It just will not turn on and cool the engine off. Does the dash gauge have to be on "H" for it to work? Or am I looking at a relay issue. Also, is it possible to install a manual fan switch (something I can wire in that will make the fan run) so I can turn the fan on whenever I want?