[petek]

Blackjack,

re: ignition switch

Look at it this way, if the ignition switch was good for 10 amps and you tried to take 20 amps through the switch, the contacts in the switch would heat up. As the switch heated up it's ability to carry current falls, let's say it went from 10 amp capability to 5 amp capability ... but you are still trying to draw 20 amps through the switch ... so the switch continues to heat up.

AND making it all that much more interesting, as the switch heats up the reistance at the contacts increases and so does the voltage drop across the switch.

It's entirely possible that the voltage drop across the ignition switch is causing your temp gauge to read high and making your fan act funny.