that's on the firewall under the hood, its for the heater/air conditioner.
You'll find the heater blower motor resistor in the heater/air conditioner compartment. This compartment is location underneath the dashboard. This is the part that allows the heater blower motor to change the fan's speed.
It is in the air conditioner /heater case behind the glovebox.
Start out by checking that the blower has both power and ground and if so then next check the a/c - heater controller...........
Not much info to go with. Need to know if the blower motor operates or not.
check fuses,see if ones blown check power at blower, don't forget the fan switch ,there famous for going out.
Blown fuse? Bad relay? Bad switch? Bad fan motor?
Pull the fuse.
Check fuses Could be a defective ignition switch
The blower motor of a 95 Chevy Caprice is located in the left, rear area of the engine compartment. It acts as the fan which operates the air conditioner and heater.
Remove the wiring harness from the back of your 2005 Chevy Cavalier heater blower motor. Remove the heater blower motor retaining bolts. Remove the heater blower fan.
it sounds like your ignition switch, i ran into a similar problem, your power goes through your ignition switch for your blower motor.