Bad head unit. If your fuse number 17 keeps blowin, that is why also.
Blower motor: remove the glove box and you will see the blower motor and blower resistor.
If you have checked the blower motor and it does function when power is applied then I would suspect the Blower Motor Resistor Pack is defective. It is also possible the blower motor speed control is bad, but highly unlikely.
WHERE is the blower motor fuse on a 1999 ford e250 4.2 L
The blower motor relay for high speed would be located in the power distribution box under the hood.
remove the battery and the cpu, the blower motor will be right under it.
Check to see if you are getting power to the blower motor - if so motor is defective if not problem in circuitry to blower motor
Inside dashboard in path of air that blower motor blows.
Held in by two screws in a housing just to the left of the blower motor housing.
The heater blower motor on a 1999 Subaru Impreza is in the engine compartment on the passenger side of the vehicle. It is located on the firewall.
there is a resistor that controls the speed and should be near the blower motor its called blower motor resistor
open glow box and take out computor and it is there on the side of blower motor
right next to the blower motor I'm don't know about the 2000 model, but it is directly behind the blower motor of the 1999 Century.