Here's a breakdown of why it's difficult and what's involved:
* No Key Access: The biggest challenge is you can't use your key to help remove or manipulate the ignition lock cylinder. This means you'll have to rely entirely on specialized tools and techniques.
* Dashboard Disassembly: Significant dashboard disassembly is typically necessary to access the ignition switch. This involves removing trim pieces, possibly the steering column shroud, and possibly the instrument cluster. The process is complex and varies slightly depending on the trim level of your truck.
* Specialized Tools: You'll likely need a specialized ignition lock cylinder removal tool. These tools are designed to grip and remove the cylinder without causing damage. A regular screwdriver or pry bar will likely damage the lock or surrounding components.
* Wiring: The ignition switch connects to a wiring harness. You'll need to carefully disconnect and reconnect this harness to avoid damaging the wires or short-circuiting the system.
* Column Lock: The steering column itself might have a lock mechanism that could further complicate the process.
* Replacement Cylinder: You'll need the correct replacement ignition lock cylinder for your 1979 F100. Getting the right part is crucial, and you may need the VIN number to ensure compatibility. You'll also need new keys that work with the replacement cylinder.
Strongly Recommended Approach:
Instead of trying this yourself, take your truck to a qualified locksmith or a reputable auto repair shop. They have the tools, experience, and knowledge to do this job properly and safely. They'll likely be able to remove the old cylinder and install a new one with minimal damage, and will also be able to cut new keys that match.
Attempting this complex repair on your own, especially without the correct tools, is highly discouraged. The cost of professional repair is far less than the potential cost of damaging your truck beyond repair.
