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Check the thermal relay for the cooling fans.
fan stays on when car turn of
Check the temperature sensor
The cooling fans turn on utilizing a temperature sensor and a relay. When the engine gets to a certain temperature the temp sensor closes and the cooling fans come on. Check fuses first. If you have a 12 volt test light, hook up the test light to the connector that goes to the cooling fans once the engine is warmed up and see if the light comes on. If it doesn't, the problem is in the power to the fans, check fuse, sensor and relay. If the light comes on and the fans don't, check for a proper ground (usually a green or black wire attached to a lug and bolted to the car chassis.
have the cooling fans checked out.
Check the relay.
Check to see if they are getting power Could be a bad temperature sensor Check to see if they come on with A/C or defroster
Turn your Cadillac on! watch coolant gauge and if the temp is more than 225 your fans should kick on if not shut car off and check harness on fan with a circuit tester and check fuses
The cooling fans are the only cooling source for a air cooled engine.
In all probability it is the cooling fan switch. Before you replace it you need to check the fuses. The cooling fan switch is on the intake manifold.
check the smog pump ,,,i had the same problem on my 95 z28
Depending on the year, make and model check the cooling fan/fans and on some models check the fan clutch...........