Cadillac Repair: blower motor, fleetwood brougham, blower motor

Question
what makes the blower motor not to work           

93 fleetwood brougham cadillac
5.7
getting heat but the fan not working

Answer
Hi Robert, The motor could be worn out and need to be replaced if it doesn't work on any speed. If the motor made grinding noises or sounded louder than normal when running then replacing the motor might get you going. There are 2 HVAC fuses...#30 and #20...that supply power to the control head. Then power comes from the control head and goes to the HVAC power module and then to the blower motor. If the module isn't grounded or the HVAC fuse #22 is blown then the module won't supply voltage to the motor. If the motor is bad then the module might be also. They are usually replaced together. Useing a test light or voltmeter at the blower motor wires will help isolate the problem area. Bill