Tools You'll Likely Need:
* Socket set (various sizes, likely including 7mm, 8mm, 10mm, etc.)
* Ratchet and extensions
* Screwdrivers (Phillips and flathead)
* Pliers
* Trim removal tools (plastic pry tools are ideal to avoid scratching)
* Possibly a torx bit set
* New blower motor (ensure you get the correct one for your vehicle)
* Shop towels or rags
* Possibly a flashlight
Procedure (General Steps – Consult your repair manual for specifics):
1. Disconnect the Battery: This is crucial for safety to prevent electrical shocks. Disconnect the negative (-) terminal first.
2. Access the Blower Motor: This usually involves accessing it from under the dashboard. This often means removing parts of the dashboard trim. Your repair manual will show the exact panels and screws to remove. Be careful not to break any clips. Take pictures as you go to help with reassembly.
3. Disconnect Electrical Connections: Locate the electrical connector to the blower motor. Carefully disconnect it. You may need to gently push on the locking tab to release the connector.
4. Remove the Blower Motor Housing: The blower motor is usually housed in a cage or housing. This often involves removing screws and possibly bolts securing it to the HVAC system. The housing might also be connected to the ductwork; carefully disconnect these connections.
5. Remove the Blower Motor: Once the housing is removed, the blower motor itself should be accessible. You may need to disconnect any mounting brackets or screws holding it in place.
6. Install the New Blower Motor: Carefully install the new blower motor, ensuring it's properly seated and aligned. Reconnect any mounting brackets or screws.
7. Reassemble the Housing: Carefully put the blower motor housing back in place, making sure everything is properly aligned and connected.
8. Reconnect Electrical Connections: Reconnect the electrical connector securely.
9. Reinstall Dashboard Trim: Carefully put back all the dashboard trim you removed, making sure all the clips are properly engaged.
10. Reconnect the Battery: Reconnect the battery's negative (-) terminal.
11. Test the Blower Motor: Turn on your car's ignition and test the blower motor on all speeds.
Important Considerations:
* Repair Manual: A repair manual specific to your 1990 Buick Century is invaluable. It will provide detailed instructions, diagrams, and torque specifications.
* Safety: Work in a well-lit area. Use caution when working with electrical connections.
* Patience: This is not a quick job. Take your time to avoid damaging any parts.
* Professional Help: If you're not comfortable with automotive repair, consider taking your car to a qualified mechanic.
This is a general outline. The specific steps and difficulty will vary depending on your particular Buick Century model. Again, consult your repair manual for accurate and detailed instructions. Improper repair can lead to further damage or safety hazards.
