However, if you're determined to try, here's a *general* outline (this is not a complete guide and omits crucial safety precautions):
1. Accessing the Ignition Switch:
* Steering Wheel Lock: This is the biggest hurdle. You might need specialized tools or techniques to release the steering wheel lock without a key. A locksmith is the best resource for this. Improper attempts can damage the steering column.
* Column Cover Removal: You'll need to remove the steering column cover (usually plastic) to access the ignition switch. This often involves removing screws or fasteners. Consult a repair manual for your specific model.
* Wiring Harness and Connectors: Once the cover is off, you'll see the ignition switch and its wiring harness. Carefully photograph or diagram the wiring before disconnecting anything.
2. Replacing the Ignition Switch:
* Disconnecting the Wiring Harness: Carefully unplug the wiring harness connectors from the ignition switch. Again, meticulously document the connections.
* Removing the Ignition Switch: The switch is usually held in place by screws or a retaining clip. Consult your repair manual for the exact procedure. You may need special tools.
* Installing the New Ignition Switch: Install the new ignition switch, making sure it's properly seated.
* Reconnecting the Wiring Harness: Carefully reconnect the wiring harness to the new ignition switch, following your diagram or photos.
* Reassembly: Reinstall the steering column cover and any other parts you removed.
Critical Considerations and Warnings:
* Repair Manual: You absolutely *need* a repair manual specific to a 1994 Ford Tempo LS. This will provide detailed instructions and diagrams crucial for this repair.
* Professional Help: This is a complex job involving electrical systems and potentially sensitive security measures. Professional help is highly recommended, especially since you lack a key. A locksmith can help with the steering wheel lock and potentially program a new key.
* Airbag Safety: If your vehicle has an airbag, take extreme caution during the disassembly and reassembly process. Disconnecting the battery is a crucial safety step but may not be sufficient.
* Security System: Some 1994 models may have rudimentary security systems that could be affected. A locksmith's expertise is valuable here.
* Wiring Damage: Incorrect wiring can cause significant electrical problems or even damage your vehicle's computer system.
In short: Unless you have significant automotive experience and access to the correct tools and a repair manual, attempting this repair without a key is strongly discouraged. Contact a qualified locksmith or mechanic for assistance.
