1. Disconnect the Battery: This is the most crucial step to prevent electrical shorts and potential damage. Disconnect both the positive (+) and negative (-) terminals.
2. Remove the Steering Column Shroud: This plastic cover surrounds the steering column. You'll likely need a screwdriver (Phillips or flathead, depending on your model) to remove screws holding it in place. It may also be clipped on, requiring careful prying. Take pictures as you go to help with reassembly.
3. Access the Ignition Switch: Once the shroud is removed, you should have visual access to the ignition switch itself. It's usually located on the steering column, behind the steering wheel.
4. Disconnect the Wiring Harness: Carefully disconnect the electrical connectors from the ignition switch. Make note of their positions or take pictures – this is essential for correct reassembly. These connectors often have locking tabs that need to be carefully depressed or released.
5. Remove the Ignition Switch: This is where things get tricky and vary the most between models. There's typically a retaining clip or nut holding the ignition switch in place. You might need special tools depending on the type of fastener. Some switches require removing a retaining ring or using a special ignition switch removal tool. Consult your repair manual to determine the specific method for your vehicle.
6. Remove the Ignition Cylinder (Key tumbler): This step is often done in conjunction with removing the switch, but it may be done separately depending on your car's setup. This usually involves a retaining clip or a small screw hidden behind the switch.
7. Install the New Ignition Switch (if replacing): Reverse the removal process to install a new ignition switch. Ensure all connectors are securely reconnected.
8. Reassemble: Carefully reinstall the steering column shroud and secure it with its screws or clips.
9. Reconnect the Battery: Once everything is reassembled, reconnect the battery terminals.
Crucial Considerations:
* Repair Manual: A factory service manual or a Chilton's/Haynes repair manual specific to your 1979 Chevy Malibu is strongly recommended. This will provide detailed diagrams and instructions tailored to your vehicle. Trying this without a manual is risky and can lead to damage.
* Tools: You'll likely need various screwdrivers, possibly a socket set, and potentially a special ignition switch removal tool.
* Patience: This is not a quick job. Take your time and be methodical.
* Safety: Always disconnect the battery before working on any electrical components in your vehicle.
If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improperly installing the ignition switch can lead to serious problems, including being unable to start your car or even creating a safety hazard.
