Here's a general outline. Specific steps may vary slightly depending on your Bronco's trim and options. Always consult a repair manual specific to your 1990 Ford Bronco for precise instructions and diagrams.
Tools You'll Likely Need:
* Security Torx bits (likely T-27 or T-30): These are often used on steering column components. Check your Bronco beforehand.
* Phillips head screwdriver: Possibly for some retaining screws or other fasteners.
* Flat-head screwdriver: May be needed for prying or gently releasing clips.
* Socket set (metric): Useful for various fasteners.
* Needle-nose pliers: For working with small parts.
* Wires and Connectors: A multimeter would assist in properly identifying wires and their functions to prevent installation errors.
* New Ignition Key Switch: Make absolutely sure you get the correct replacement part for your vehicle.
* Patience: This is essential.
General Steps (Consult your repair manual for specific details):
1. Disconnect the Battery: This is the most important step to prevent electrical shorts or injury. Disconnect the negative (-) terminal first.
2. Remove Steering Wheel: This is often necessary to access the ignition switch. You'll likely need a steering wheel puller. Mark the position of the steering wheel relative to the steering column before removal to ensure proper realignment later.
3. Remove Steering Column Shroud/Bezel: This is the plastic or metal cover around the steering column. It usually involves removing screws and possibly some clips.
4. Access the Ignition Switch: Once the shroud is removed, you should have access to the ignition switch. It's typically held in place by screws or a retaining clip.
5. Disconnect Electrical Connectors: Carefully disconnect the electrical connectors from the ignition switch. Take photos or make notes of the wire locations before disconnecting. A wiring diagram is invaluable here.
6. Remove the Ignition Switch: Remove the screws or clip holding the ignition switch in place. The switch might be slightly tricky to remove; use gentle but firm pressure.
7. Install the New Ignition Switch: Install the new ignition switch, ensuring it's properly seated. Reconnect the electrical connectors, making sure each wire goes back to its original location.
8. Reassemble: Carefully reassemble everything in reverse order of disassembly, making sure everything is securely fastened.
9. Reconnect the Battery: Connect the positive (+) terminal last.
10. Test: Test the ignition switch to make sure everything is working correctly. Test all ignition positions (accessories, start, etc.).
Important Considerations:
* Matching the Key: The new ignition switch should come with a new key, or you may need to have your key cut to match the new switch.
* Anti-theft System: If your Bronco has an anti-theft system, you might need to reprogram it after replacing the ignition switch.
* Steering Column Lock: Be aware of the steering column lock mechanism. Ensure it operates correctly after reassembly.
Again, this is a general overview. A detailed repair manual for your specific 1990 Ford Bronco is essential for accurate and safe completion of this repair. If you lack the experience or tools, seeking professional assistance from a qualified mechanic is strongly recommended. Improper installation can lead to electrical problems or damage to your vehicle.
