However, here's a general outline of the process. This is not a substitute for a repair manual and should only be used as a general guide. Variations exist, and your specific vehicle may have differences.
Steps (General Outline - Consult your repair manual for accuracy):
1. Disconnect the Battery: This is the most crucial step. Disconnect the negative (-) terminal first to prevent short circuits.
2. Remove Steering Wheel (Potentially): In some cases, the steering wheel might need to be removed to access the ignition switch. This involves disconnecting the horn wiring, removing the steering wheel retaining nut and pulling the wheel off the steering column. This is a significant undertaking requiring special tools and care.
3. Remove the Steering Column Shroud: This is the plastic cover surrounding the steering column. This usually involves removing screws or clips.
4. Access the Ignition Switch: Once the shroud is removed, you should be able to see the ignition switch. It's usually held in place by screws or a retaining clip. Your repair manual will show exactly how it's secured.
5. Disconnect Electrical Connections: There will be several wiring harnesses connected to the ignition switch. Carefully disconnect each one, taking note of their locations for reassembly. Take pictures if necessary.
6. Remove the Ignition Switch: Once the wiring harnesses are disconnected, carefully remove the ignition switch from the steering column. This might involve removing screws or carefully prying it out.
7. Install New Ignition Switch (if replacing): Install the new ignition switch, reversing the removal steps. Ensure all wiring harnesses are correctly reconnected.
8. Reconnect the Battery: Reconnect the battery's positive (+) terminal.
Important Considerations:
* Security: Your ignition switch might be integrated with your anti-theft system. Consult your repair manual to understand how to avoid disabling the system.
* Tools: You'll likely need screwdrivers (Phillips and flathead), possibly a socket wrench, and potentially a steering wheel puller.
* Wiring: Carefully label or photograph the wiring connections before disconnecting to avoid miswiring during reassembly. Incorrect wiring can damage your vehicle's electrical system.
Again, this is a general overview. Use a repair manual specific to your 1988 Pontiac Bonneville to ensure you perform the procedure correctly and safely. If you're not comfortable performing this task yourself, take your vehicle to a qualified mechanic. Attempting this without proper knowledge can cause significant damage.
