Tools You'll Likely Need:
* Socket set (metric): Various sizes, likely including 7mm, 8mm, 10mm, and possibly larger.
* Screwdrivers (Phillips and flathead): Different sizes may be needed.
* Wrench set (metric): For various fasteners.
* Pliers (needle-nose and regular): For working with small parts and connectors.
* Electrical tape: To secure wiring.
* A new ignition switch: Make sure you get the correct replacement part for your specific Bonneville. The part number should be found in your owner's manual or online parts catalogs.
* Repair manual: Absolutely crucial for detailed steps, wiring diagrams, and torque specifications.
* Safety Glasses: Protect your eyes from flying debris.
General Steps (Always Refer to Your Repair Manual):
1. Disconnect the Battery: This is the most crucial safety step. Disconnect the negative (-) terminal first to prevent accidental shorts.
2. Remove Steering Wheel (Possibly): In some cases, you may need to remove the steering wheel to access the ignition switch. This is a complex step requiring specialized tools and knowledge to prevent damaging the airbag (if equipped) or the steering column. Consult your repair manual for this procedure, as it involves potentially dangerous steps.
3. Remove the Steering Column Shroud/Covers: This will expose the ignition switch. There will be screws and possibly clips securing these panels.
4. Disconnect Electrical Connectors: There will be several connectors attached to the ignition switch. Carefully disconnect them, taking note of their positions for reassembly. A digital camera can be very helpful here.
5. Remove the Ignition Switch: This usually involves removing screws or retaining clips that hold the switch in place. This is often the most challenging part, requiring careful manipulation.
6. Install the New Ignition Switch: Carefully install the new ignition switch, ensuring it's correctly seated and aligned.
7. Reconnect Electrical Connectors: Reconnect the electrical connectors, making sure they are firmly seated.
8. Reinstall Components: Reinstall the steering column shroud/covers, steering wheel (if removed), and any other components you removed.
9. Reconnect the Battery: Reconnect the battery's positive (+) terminal.
10. Test the Ignition System: Turn the key to verify all functions are working correctly (lights, starter, accessories).
Warnings and Considerations:
* Airbag: If your Bonneville has an airbag, disconnecting the battery is insufficient; you may need to follow specific procedures to avoid deploying it accidentally. Consult your repair manual.
* Steering Wheel Removal: Incorrectly removing or reinstalling the steering wheel can severely damage the steering column and is potentially dangerous. Only attempt this if you have the necessary expertise and tools.
* Wiring: Carefully label and document any wires you disconnect to prevent misconnections during reassembly.
* Security System: If your vehicle has a security system, it may be affected by the ignition switch replacement. You might need additional steps, including reprogramming.
Recommendation:
This job is best left to experienced mechanics unless you're comfortable working with car electrical systems and have the proper tools and repair manual. Attempting this without the necessary knowledge could result in damage to your vehicle or personal injury. If you are unsure, take your car to a qualified mechanic.
