1. Preparation: You'll likely need various tools including screwdrivers (Phillips and possibly flathead), possibly sockets and wrenches, and possibly a panel removal tool to avoid scratching the plastic. A flashlight will be essential. Consult a repair manual for your specific model to ensure you have the right tools and understand the specific layout.
2. Access: This is the most challenging part. You'll need to remove parts of the dashboard to reach the blower motor. This usually involves:
* Removing the lower dash panel: This often involves removing screws and possibly some clips holding the panel in place. Be careful; these clips are prone to breakage.
* Removing the glove box: This often requires removing screws and possibly hinges.
* Possibly removing other panels: Depending on the access needed, you might need to remove additional panels around the blower motor housing.
3. Disconnecting the Blower Motor: Once you have access, you'll see the blower motor. You'll need to:
* Disconnect the electrical connector: Carefully unplug the electrical connector from the blower motor.
* Disconnect the blower motor resistor (if applicable): This is a common failure point, and you may need to remove it to get better access.
* Remove the blower motor retaining screws or clips: These will hold the blower motor in place. The exact method varies; a repair manual is crucial here.
4. Removing the Blower Motor: Carefully remove the blower motor from its housing. It may be held in place with various clips or screws.
5. Reassembly: Once you've completed your repair or replacement, reverse the steps above to reassemble everything. Ensure all electrical connections are secure. Check the blower motor's operation before reassembling all the dash panels.
Crucial Considerations:
* Repair Manual: A repair manual specific to your 1989 Buick Century is *absolutely essential*. It will show you exactly what panels need to be removed, where the screws are located, and the correct procedure for removing the blower motor. You can often find these online (some free, some paid) or at auto parts stores.
* Patience: This is not a quick job. Take your time and be methodical to avoid damaging any parts.
* Photography: Before disconnecting anything, take pictures. This will help you remember where everything goes during reassembly.
* Professional Help: If you're not comfortable working on your car's electrical system or removing interior panels, consider having a qualified mechanic perform this repair. Damaging the dashboard can be far more expensive than the repair itself.
Remember, safety first! Disconnect the negative battery cable before beginning and be careful when working around electrical components.
