You are talking about the blower motor/fan correct?
There are few small screws that hold it in place. Easiest thing to do is confirm you have a power and ground by plugging in a test light to the two terminals that connector to the fan motor (harness side and unplugged).
This is all right behind the glove box, cannot remember if you have to remove it or not, most you do not but if needed it's only like 5-10 phillips head screws.
If you remove the blower motor and plug it in with two wires to a 12V battery, then you can eliminate the motor as a last step, first try the test light at the blower motor connector for the motor, unplugged. Then you know you have a full power and ground circuit working. If you test on full high, the light should be full bright, then select each speed lower and the light should dim for each step down. DO NOT ALLOW THE test light wires to touch - short circuit, possible blown fuse if they do, wrap them in electrical tape to insulate if you have to. If the test light does not light up, then more than likely you have a blower motor resistor that is dying (big ceramic/wound wire resistor plate usually in the air stream near the blower motor.
If the fan works on and off, blower motor resistor or old fan contacts wearing out are most suspect.
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