Fan will not turn on when Engine over heats and the Temp light does not work.

Yes, sensor ! There is no switch, that I can find or know of ! 6 cylinder. 3.3L Thanks !

Ok. So it doesn't have a gauge. Just to clarify: Temp Sender Switch - Gauge $ 15.30 /ea Part Number: ECH TS4014 Product Line: NAPA Echlin Ignition Parts.. Tell me if it's boiling the coolant out of the radiator ... Since the light IS working.. Just how do you know it's actually overheating... Note that these engines reach 225° f at times before fan turns on!!.. A professional scanner and someone to use it would make this a piece of cake.. Good luck and happy motoring!

sorry that was relayed incorrectly the idiot light will shine when key in on position. But when car overheat then the light does not come on. Also swap tested the relays.

Thank you, pin test? what is that? The engine light does not come on there for the diagnostic computer does not produce codes. Thank you for your reply.