Tools you'll likely need:
* Phillips head screwdriver
* Flat head screwdriver (possibly)
* Wire strippers/crimpers (if replacing wires, not just the switch)
* Socket wrench set (might be needed depending on how the switch is mounted)
* Electrical tape (if necessary)
* New headlight switch (ensure you get the correct one for your 1966 Mustang!)
* Optional: Digital multimeter (to test wiring before and after)
Steps:
1. Access the Switch: The location of the headlight switch varies slightly depending on the trim level and options of your Mustang. It's usually located on the dashboard, often under or near the steering column. You'll likely need to remove the steering wheel bezel (the plastic trim around the steering wheel) to gain access. This usually involves removing screws or clips. Consult a 1966 Mustang shop manual or online resources with pictures for specific instructions on bezel removal for your model.
2. Disconnect the Wiring: Carefully disconnect the wires from the old headlight switch. Take photos or make a detailed diagram before disconnecting anything to help with reassembly. Note the color codes of the wires and where they connect. A digital multimeter can help you identify which wire goes where if you're uncertain.
3. Remove the Switch: Once the wires are disconnected, the switch itself should be relatively easy to remove. It may be held in place by screws, clips, or a retaining nut. Again, refer to your shop manual or online resources for specific removal instructions for your Mustang's switch. Sometimes gently prying with a flathead screwdriver (being extremely careful not to damage anything) is necessary.
4. Install the New Switch: Carefully install the new headlight switch, ensuring it's properly seated. Tighten any screws or clips.
5. Reconnect the Wiring: Reconnect the wires to the new headlight switch, matching the colors and positions to your diagram or photos. Double-check your work before proceeding.
6. Reassemble: Reinstall the steering wheel bezel and any other parts you removed to access the switch.
7. Test: Reconnect the negative battery terminal. Test the headlight switch thoroughly to ensure all functions (headlights, parking lights, etc.) work correctly.
Important Considerations:
* Shop Manual: A 1966 Ford Mustang shop manual is invaluable for this type of repair. It will provide detailed diagrams and instructions specific to your car's model.
* Wiring Diagrams: Online forums and Mustang-specific websites often have wiring diagrams that can be extremely helpful.
* Professional Help: If you're not comfortable working with car electrical systems, it's best to seek professional help from a mechanic. Improper wiring can cause damage to your car's electrical system or even create a fire hazard.
This is a general guide, and the specific steps may vary slightly depending on your car. Always consult a repair manual or online resources specific to your 1966 Ford Mustang model before attempting this repair. Safety first!
