Originally Posted by cobalt327
The resistor(s) that give low and medium speeds on the fan can burn out, but if put on "High", it should work unless something else is wrong. I'd need a wiring diagram to know for sure if the fan is protected by a fuse or circuit breaker and to know the location, but this needs to be checked.
I'd check for voltage at the fan motor w/the fan switch set to all the speeds. If you have voltage and no motor, the motor is either bad or has problems like worn out brushes. Probably the easiest thing to do if there's voltage but no motor action is just replace the motor.
For the rear defroster, there are 'kits' that supposedly repair any breaks in the conductor strips. I've never used this, but am aware it exists.
I think it might be the motor then since I get nothing out of the vents on any of the settings.
Do you know if the blower motor is behind the dash somewhere or under the hood?