I have a 1997 Cav.4cyl.2.2 I just bought.The a/c,heater fan and control lights don't work.Theres a purple wire laying on the console coming from under dash in middle of car. Does this wire run the a/c , heater fan? Another question when driving at lower speeds(30 to 40) car temp is over the halfway mark, as I go faster the temp. starts to climb to the red line.Is this a thermostat or plug radiator problem? Where does the purple wire go?Thanks John.