Here's a general overview. Specific procedures may vary slightly depending on the trim level and options on your Mustang. Always consult a repair manual specific to your vehicle's year and model for the most accurate instructions.
Tools You'll Likely Need:
* Security Torx bits: The steering column likely uses security Torx screws. You'll need the correct bit size and type.
* Flathead screwdriver: Possibly needed to pry or manipulate certain components.
* Phillips head screwdriver: Possibly needed for some screws.
* Pliers: For gripping small parts.
* New ignition cylinder: Make sure it's the correct one for your year and model Mustang.
* Penetrating oil (PB Blaster, etc.): To help loosen any stubborn screws or components.
* Shop rags: To keep things clean.
* A repair manual specific to your 1990 Ford Mustang: This is crucial for detailed, accurate instructions and diagrams.
General Steps (Consult your repair manual for precise instructions):
1. Disconnect the battery: This is a crucial safety step to prevent accidental shorts or damage to the electrical system.
2. Remove the steering wheel: This is usually done by removing a bolt or bolts at the center of the steering wheel. You may need a special steering wheel puller tool. Make note of the steering wheel's position relative to the steering column before removing it. This will help ensure correct realignment later.
3. Access the ignition cylinder: This typically involves removing the steering column shrouds or covers. This will expose the ignition cylinder. You may have to remove some screws and/or detach plastic trim pieces.
4. Remove the ignition cylinder: This usually involves removing a retaining clip or screws that hold the cylinder in place. Before removing anything, take note of the orientation and position of any wiring harnesses and components connected to the cylinder. Take pictures if needed. Sometimes, a special tool is required to remove the ignition cylinder.
5. Install the new ignition cylinder: Carefully insert the new ignition cylinder, ensuring it's properly aligned and seated. Reinstall any retaining clips or screws.
6. Reconnect any wiring harnesses: Double-check that everything is connected correctly.
7. Reinstall the steering column shrouds and covers: Reassemble the steering column components in reverse order of removal.
8. Reinstall the steering wheel: Ensure it's aligned correctly with the steering column. Tighten the steering wheel retaining bolt(s) securely.
9. Reconnect the battery: Test the ignition system to ensure it functions correctly.
Important Considerations:
* Security: The ignition cylinder is a security component. Ensure you are replacing it with a properly matched component. If you are having problems with the ignition cylinder locking/unlocking, this could indicate a bigger security issue. You may want to seek the help of a locksmith.
* Wiring: Be extremely careful with wiring connections. Incorrectly reconnecting wires can damage the electrical system.
* Realignment: Accurate realignment of the steering wheel is essential for safe operation.
This is a simplified overview. Using a repair manual specific to your 1990 Ford Mustang is absolutely essential to avoid damaging your vehicle. If you're not comfortable performing this task, it's best to take your car to a qualified mechanic.
