Here's a general overview of the process; however, *this is not a substitute for a proper repair manual*:
1. Safety First:
* Disconnect the negative battery cable. This is crucial to prevent electrical shock and short circuits.
2. Accessing the Ignition Switch:
* This is usually located beneath the steering column shroud. You'll likely need to remove the steering wheel column shroud (plastic cover). This typically involves removing screws and possibly some clips. The exact method varies by vehicle. Consult your repair manual.
* Once the shroud is removed, you'll have better access to the ignition switch itself.
3. Removing the Ignition Switch:
* Identify the wiring harness connected to the ignition switch. Take photos or make detailed notes of the wiring connections before disconnecting anything. This is absolutely critical for reassembly.
* Disconnect the wiring harness. There may be connectors or screws securing the harness to the switch. Carefully disconnect them.
* Remove the ignition switch itself. This may involve removing retaining screws or clips holding it in place. Again, your repair manual is essential here. The switch may be held in place by a retaining clip or even a special tool.
4. Installing the New Ignition Switch:
* Install the new ignition switch. Make sure it is securely in place, matching the orientation of the old switch.
* Reconnect the wiring harness. Refer to your photos or notes to ensure each wire is connected to the correct terminal. Double-check this step to avoid electrical problems.
* Reinstall the steering column shroud. Secure all screws and clips.
5. Testing:
* Reconnect the negative battery cable.
* Test the ignition switch. Try starting the car, checking all ignition positions (accessories, ignition, start). Ensure everything functions correctly.
Important Considerations:
* The ignition switch may be linked to other components like the steering lock. You may need to carefully address these interconnections to prevent problems.
* You might need special tools. Some ignition switches require specific tools for removal and installation. A repair manual will usually list these tools.
* If you're uncomfortable with this task, take it to a qualified mechanic. Incorrectly installing the ignition switch can lead to electrical problems or even damage to your vehicle.
This is a general guide. Always consult a repair manual for your specific 1989 Mercury Tracer before attempting this repair. Failure to do so can result in damage to your vehicle or personal injury.
