Self-resetting breakers are integrated into modern automotive wiring harnesses and often are part of the larger fuse box assembly. Retrofitting one into a 65 Mustang would be a significant modification requiring expertise in automotive electrical systems. It's not a straightforward swap.
Instead of a self-resetting breaker, consider these options:
* Replacing blown fuses: This is the standard and safest approach for a classic car. Keep a selection of the correct fuse amperages on hand. A blown fuse indicates a short circuit or overload – don't simply keep replacing it without addressing the underlying issue.
* Adding an aftermarket circuit breaker panel: You could install a separate, modern fuse/circuit breaker panel. This would require careful wiring and understanding of your car's electrical system. However, this is a more involved and potentially expensive option.
* Using automotive blade fuses in a suitable holder: Many auto parts stores sell fuse holders that accommodate modern blade fuses, offering a safer and more convenient alternative to the original style.
Before making any modifications, consult a wiring diagram for your specific 1965 Mustang model to ensure you're working safely and correctly. Incorrect wiring could damage your car's electrical system or even cause a fire.