Tools You'll Likely Need:
* Socket set: Various sizes, including metric and standard.
* Screwdrivers: Phillips and flathead, various sizes.
* Wrench set: Possibly open-end and combination wrenches.
* Pliers: Needle-nose and regular.
* Wire strippers/crimpers: If you need to repair or replace wiring.
* Test light or multimeter: To check wiring and power.
* Ignition switch removal tool (highly recommended): This specialized tool helps prevent damage to the ignition switch housing and steering column.
* Shop towels or rags: To keep things clean.
* 1966 Mustang repair manual: Absolutely crucial for accurate diagrams and torque specifications.
Steps (General Outline - Consult your manual for precise details):
1. Disconnect the Battery: This is the *most crucial* first step. Disconnect the negative (-) terminal to prevent electrical shorts and injury.
2. Steering Column Access: You'll likely need to access the ignition switch from underneath the steering column. This may involve removing parts of the steering column shroud or dash trim. Your repair manual will detail this.
3. Remove the Old Ignition Switch: This is often the trickiest part. The ignition switch is usually held in place by screws or a retaining clip. Using the specialized ignition switch removal tool is highly recommended to avoid damage. If you don't have one, proceed with extreme caution to avoid breaking the switch or its housing. Once removed, carefully note the wiring connections before disconnecting them. Take pictures or make a detailed diagram.
4. Inspect the Wiring: Carefully examine the wiring harness connected to the old switch. Look for any damage, corrosion, or broken wires. Repair or replace any damaged wires.
5. Install the New Ignition Switch: Carefully align the new switch with its mounting points. Secure it in place using the appropriate screws or clips.
6. Reconnect the Wiring: Connect the wiring harness to the new switch, ensuring each wire goes to the correct terminal. Refer to your diagram or the repair manual to ensure correct connections. Incorrect wiring can lead to serious problems.
7. Test the Switch: Reconnect the battery. Test all ignition switch positions (accessories, start, run, etc.) to make sure everything functions correctly. Check your headlights, horn, and other accessories to ensure they operate as intended.
8. Reassemble: Reinstall all the components you removed to access the ignition switch.
9. Double-Check: Before driving, double-check all connections and ensure everything is secure.
Important Considerations:
* Key Matching: If you're replacing the entire switch assembly, ensure the new key matches the ignition cylinder.
* Wiring Diagram: The wiring diagram in your repair manual is indispensable. Pay close attention to the color-coding of the wires.
* Professional Help: If you're uncomfortable performing this repair, it's best to seek professional help from a qualified mechanic. Improper installation can result in electrical problems or damage to your vehicle.
This is a simplified overview. The actual process is more involved and requires careful attention to detail. Again, a 1966 Mustang repair manual is essential for this project. Don't skip this step. The detailed diagrams and instructions are crucial for success.
