1992 Lumina Euro 3.1 sedan. My main cooling fan engages, but it will not turn off. Has run over 30 minutes after the car is off, so I disconnect the wires. Engine temp operating at normal temperatures. Temp gauge appears to read properly. The only things I can think of are the fan relay and the coolant sensor. But I would think if the coolant sensor was bad it would not turn on the fan to begin with.

Any ideas??

Relay is stuck...give it a good rap and it'll probably turn off...then replace it...

I agree with Jeff.

Thanks! Stupid question, but why am I having so much trouble finding the relay? I must have spend 45 minutes looking for it with no luck. Any suggestions?

Thanks! Stupid question, but why am I having so much trouble finding the relay? I must have spend 45 minutes looking for it with no luck. Any suggestions?

According to AutoZone:

On your 1992 Chevrolet Lumina-Sedan/Coupe, the Relay is:


UNDER HOOD, PASSENGER SIDE, FRONT ENGINE AREA, LOWER
FENDERWELL, MOUNTED IN RELAY BLOCK