General Steps (Consult your repair manual for precise details):
1. Disconnect the Battery: This is the most important step to prevent accidental short circuits and damage to your vehicle's electronics. Disconnect both the negative (-) and positive (+) terminals.
2. Remove the Steering Column Shroud: This plastic cover surrounds the steering column and needs to be removed to access the ignition switch. This usually involves removing screws or clips.
3. Remove the Ignition Switch: This is the trickiest part. You'll likely need to:
* Detach the ignition lock cylinder: This is the part where you insert the key. There will be screws or retaining clips holding it in place. You'll need to carefully disconnect the wiring harness connected to this cylinder.
* Access the ignition switch itself: This is usually located behind the lock cylinder. You might need to remove additional components (like a trim panel) to fully access it. There are usually screws or retaining clips holding the ignition switch in place. Again, the wiring harness needs to be carefully disconnected.
* Take note of the wiring harness connections: Before disconnecting anything, take pictures or make detailed notes of how the wires are connected. This will be essential when reinstalling the new switch.
4. Install the New Ignition Switch: Carefully reverse the removal process, ensuring all wires are correctly reconnected. Refer to your notes or pictures.
5. Reinstall the Steering Column Shroud: Securely attach the shroud.
6. Reconnect the Battery: Reconnect the battery terminals.
7. Test the Ignition Switch: Start your car and test all ignition positions to make sure everything works correctly.
Important Considerations:
* Security: The ignition switch and lock cylinder often involve security features. Be prepared for potential complications related to this. You might need to have your key coded if you replace the entire ignition switch assembly.
* Special Tools: You might need special tools, such as Torx drivers, security bit drivers, or a steering wheel lock removal tool (though, again, you shouldn't *need* a steering wheel removal tool).
* Professional Help: If you're not comfortable with automotive repair, or if you're unsure about any step, it's best to take your car to a qualified mechanic. A poorly installed ignition switch can lead to serious safety hazards.
Remember: This is a simplified overview. Always consult your repair manual for specific instructions and safety precautions for your 1998 Buick Century. Improper procedures can damage your vehicle or cause injury.
