sounds like a bad sending unit for the fan.
It sounds like it might be the fan motor .
Apply 12V directly to the motor and see if it works Turn ignition switch and A/C on and check to see if you are getting power to the fan motor- if so motor is bad - if not could be a bad fuse or relay or sensor switch
Built in the fan blower/motor.
Remove the wiring harness from the back of your 1999 Cadillac Escalade radiator fan motor. Remove the radiator fan motor retaining bolts. The radiator fan will come off.
To replace a bathroom vent fan motor, follow these steps: Turn off the power to the fan at the circuit breaker. Remove the cover of the fan to access the motor. Disconnect the wiring from the old motor. Unscrew and remove the old motor from the fan housing. Install the new motor in the fan housing and secure it with screws. Reconnect the wiring to the new motor. Replace the fan cover. Turn the power back on and test the fan to ensure it is working properly.
Check the fuse and the wiring.
You have a bad blower motor. i have seen a lot of the switches go bad turn on the fan and try pushing down on the fan switch and see if the fan comes on Just to add a liitle to this reply generally if it is your fan switch not all of the speeds burn out at the same time so try turning the switch to every position if any of them turn on ur fan than its just the switch if none of the fan speeds work than it is your blower motor.
To change the condenser fan motor, first turn off the power to the unit. Remove the fan blade and motor from the unit. Disconnect the electrical wires and remove the old motor. Install the new motor, reconnect the wires, and reattach the fan blade. Finally, turn the power back on and test the unit to ensure it is working properly.
To replace a condenser fan motor in an air conditioning unit, you need to turn off the power, remove the fan blade, disconnect the wiring, unbolt the motor, install the new motor, reconnect the wiring, replace the fan blade, and turn the power back on.
Turn it off...
1992 olds Achieva does not have that switch. ECM receive signal from the coolant temperature sensor and send command to relay #6 for turn on/off the radiator fan. Relay #6 is located in the motor compartment on the fireboard.
To replace a Nutone bathroom fan motor, follow these steps: Turn off the power to the fan at the circuit breaker. Remove the fan cover and disconnect the wiring. Unscrew the motor from the housing. Install the new motor and secure it in place. Reconnect the wiring and replace the fan cover. Turn the power back on and test the fan to ensure it is working properly.