If you’re a proud owner of a 1966 Mustang, then you know how important it is to make sure every component of your car is in top condition. One of the key components of your Mustang is its tail lights, and ensuring they’re wired properly is crucial. In this article, we’ll provide a comprehensive guide to the 66 Mustang tail light wiring diagram, covering everything you need to know to get your lights working correctly.
Section 1: Understanding the 66 Mustang Tail Light Wiring Diagram
Before we dive into the specifics of the wiring diagram, let’s take a moment to understand the different components that make up your Mustang’s tail lights. Each tail light assembly consists of three main components:
- The housing
- The lens and reflector
- The wiring and bulb sockets
Now that we understand the components, let’s discuss the different wires you’ll find on your Mustang’s tail light assembly:
- The ground wire: This wire attaches to the metal frame of the car and provides a direct path to the negative terminal of the car’s battery.
- The parking light wire: This wire powers the small bulb in your tail light assembly that illuminates when you turn on your headlights.
- The brake light wire: This wire powers the main bulb in your tail light assembly that illuminates when you press the brake pedal.
- The turn signal wire: This wire powers the bulb in your tail light assembly that flashes when you activate your turn signals.
Now that we understand the different wires and components, let’s take a closer look at the 66 Mustang tail light wiring diagram.
Section 2: The 66 Mustang Tail Light Wiring Diagram
The 66 Mustang tail light wiring diagram might seem complicated at first glance, but don’t worry – we’ll break it down step by step. Here’s an overview of the wiring diagram:
| Wire Color | Function | Location | Number of Wires |
| Black | Ground | Left tail light housing | 1 |
| Black | Ground | Right tail light housing | 1 |
| Green | Right turn signal | Left tail light housing | 1 |
| Green with white stripe | Left turn signal | Right tail light housing | 1 |
| Yellow | Brake light | Both sides | 2 |
| Brown | Parking light | Both sides | 2 |
Let’s break down each wire and function in more detail:
Ground
As we mentioned earlier, the ground wire provides a direct path to the negative terminal of the car’s battery. On the 66 Mustang, the ground wire is black and is connected to both the left and right tail light housing.
Turn Signals
The turn signal wires are green and green with a white stripe, and are responsible for powering the bulbs that flash when you activate your turn signals. The green wire powers the right turn signal and is connected to the left tail light housing, while the green with white stripe wire powers the left turn signal and is connected to the right tail light housing.
Brake Lights
The brake light wire is yellow and is responsible for powering the main bulb in your tail light assembly that illuminates when you press the brake pedal. There are two yellow wires – one for each tail light housing – and they’re both connected to the brake light socket.
Parking Lights
The parking light wire is brown and is responsible for powering the small bulb in your tail light assembly that illuminates when you turn on your headlights. There are two brown wires – one for each tail light housing – and they’re both connected to the parking light socket.
Section 3: Frequently Asked Questions
1. Why are my tail lights not working?
If your tail lights aren’t working, the first thing to check is the fuse. If the fuse is intact, check that the bulbs are installed correctly and that the wiring is connected properly. If you’re still experiencing issues, it might be time to consult a professional mechanic or electrician.
2. How do I replace a tail light bulb?
To replace a tail light bulb, first locate the bulb socket and remove it from the tail light assembly. Then, remove the bulb from the socket and replace it with a new one. Finally, reinstall the socket in the tail light assembly and test the bulb to make sure it’s working properly.
3. How often should I replace my tail light bulbs?
Tail light bulbs typically last for several years, but it’s a good idea to replace them as soon as they start to dim or flicker. This will ensure that you always have bright, reliable tail lights to keep you safe on the road.
4. Can I install LED tail lights on my 66 Mustang?
Yes, you can install LED tail lights on your 66 Mustang, but it’s important to make sure they’re compatible with your car’s wiring system. Consult a professional or refer to the manufacturer’s instructions to ensure a proper installation.
5. Why do my tail lights stay on when I turn off my car?
If your tail lights stay on even after you’ve turned off your car, there may be an issue with the wiring or switch. Consult a professional to diagnose and repair the issue.
Conclusion
Now that you understand the 66 Mustang tail light wiring diagram, you’re equipped to handle any issues that may arise with your car’s tail lights. Remember to always refer to the diagram and follow best practices to ensure a proper and safe repair. And as always, if you’re not sure what to do, don’t hesitate to seek the help of a professional mechanic or electrician.
