Where is the sensor for the coolant to tell the fan when to kick on for a 1997 Pontiac Grand Am?

Question

I have a 1997 Pontiac Grand Am. I have been having problems with it overheating for about the past year. I think we have narrowed it down to the sensor. Where is the sensor that tells the fan when to kick on and cool off the coolant and engine located?

Answer 1

Typically the sending unit is on the water outlet. (where the top radiator hose connects to your cylinder head). But it has been my experience that the relay is more apt to work intermittently. the fact that you have been driving it for a your tells me it doesn't overheat all the time.

Answer 2

Change your coolant temperature sensor. Most likely, that is the problem. Also, Check for bad electrical grounds or connections or shorts in wire to fan. Sensor is most likely, but not sure, near the thermostat, where upper radiator hose goes into engine block. You might try a repair book. I always buy a repair book for every car I own. $10, well worth the money. You will save much by learning how to work on cars. Try Chiltons or Haynes, at any auto parts store. Good luck. PS: are you SURE it's the fan's fault????? Sounds more like a bad thermostat. Easy job.

Answer 3

What engine do you have? The sensor for a 3.1 is near the throttle body on the driver's side of the engine. Look in the valley of the lower intake. It has two wires on it ,one is black, the other is yellow and might have a black stripe. The fan should kick on about 226 degrees F.