Chevy Corsica blower motor does not work

Is the blower motor not getting power or ground ?
There are two fuses that power the HVAC control module. The module controls the blower motor processor and the blend doors.
Have you tested the module and processor ?
You may need a shop manual for the wiring diagrams and procedures.

Faulty blower motor resistor or blower motor resistor connector faulty.Wiggle blower motor resistor connector with the ignition and fan switches on.

KEY ON, FAN ON HIGH TAP FAN MOTOR NEAR WHERE POWER GOES IN, IF BLOWER RUNS REPLACE BLOWER MOTOR.

The blower resistor has gone bad which is why you lost blower speeds.This may have been caused by the blower motor drawing too much power. At this point I would verify that no fuses burned out and then check the pigtail plugs going to the resistor and blower motor to make sure the connectors and connections are not melted or wiring is frayed. These connectors are located in the engine compartment on the passenger side. After checking this and if everything appears ok then the blower motor itself has probably gone bad and needs replaced. I would also replace the blower motor resistor as well. If the connectors appear damaged replace or repair as needed .

See if there is power to the heater motor. If there is, replace the blower motor. If not, replace the switch.

check fuse and switch for heater if good check power to blower motor at heater core if power remove blower motor and check housing for debris (leaves etc)and blower motor for proper turning unit may need to be lubed if hard to turn or seized if seized and oil/lube not working replace blower

did you replace the speed control resistor near the blower motor?

first check the fuse or relay.. this will be the cheapest sollution and easiest to check.

Ok, first off, check the fuses under the dash. If they're all good, does the blower work only on high speed? If yes, then you have a bad blower motor resistor, which is located under the hood, near the blower motor itself. If the motor doesnt work at all at any fan speed, make sure the wiring harness that plugs into the motor under the hood is clean and tightly installed. If it still doesnt operate, sometimes tapping on the blower motor housing will kick it on, but if that doesnt work, you may have to replace the blower motor. They are available aftermarket, and arent usually too expensive.

Need copy of wiring schematic for 1991 chevy corsica