Here's a general outline. This is not a complete, step-by-step guide, and specific procedures may vary slightly depending on the exact model of your truck. Consult a repair manual specific to your 1981 Ford truck for detailed instructions and diagrams. A Haynes or Chilton manual would be excellent resources.
Tools You'll Likely Need:
* Screwdrivers: Phillips and flathead, various sizes
* Socket set: Metric and possibly SAE, depending on your truck
* Pliers: Needle-nose and possibly slip-joint
* Ignition switch removal tool: This specialized tool makes the job much easier. It helps to remove the cylinder without damaging it. You can often find these at auto parts stores.
* New ignition tumbler: Ensure you get the correct one for your truck's year and model. You'll likely need the key code or VIN number to get the right match.
* Wiring diagram: Helps you reassemble the ignition switch correctly.
* Penetrating oil (like PB Blaster): To help loosen any stubborn screws or parts.
General Steps (Consult your repair manual for precise details):
1. Disconnect the negative battery cable. This is crucial to prevent electrical shock and short circuits.
2. Remove the steering wheel: This often involves removing the horn contact, nuts securing the wheel, and possibly a retaining clip. Be very careful; the steering wheel can be heavy.
3. Access the ignition switch: This typically involves removing the steering column shroud or trim pieces. The location and access method vary depending on your specific truck model.
4. Remove the ignition tumbler: This is where the specialized removal tool is extremely helpful. You'll need to insert the tool into the ignition switch, then carefully maneuver it to release the tumbler. If you don't have the tool, be prepared for a more challenging and potentially damaging process.
5. Inspect the ignition switch housing: Check for any damage or wear and replace the housing if necessary.
6. Install the new ignition tumbler: This is the reverse of the removal process. Ensure it's correctly seated.
7. Reconnect everything: Carefully put everything back together, making sure all screws and components are securely fastened. Pay close attention to the wiring connections.
8. Reconnect the negative battery cable.
9. Test the ignition: Turn the key to ensure the ignition system is working correctly.
Important Considerations:
* Key Codes: You may need your key code or VIN to order the correct replacement ignition tumbler. This ensures the correct key will work.
* Professional Help: If you're not comfortable working on your vehicle's electrical system or aren't mechanically inclined, it's best to take it to a qualified mechanic. Improper installation can lead to further damage or safety issues.
* Security: After replacing the tumbler, you may want to consider upgrading your ignition system with additional security measures to deter theft.
This is a general overview; a repair manual specific to your 1981 Ford truck is essential for accurate and safe completion of this task. Always prioritize safety and consult professional help if needed.
