1965 Ford Mustang LED Headlight Conversion Guide morsunled.wordpress.com

Most quality LED headlights are true plug-and-play, meaning no cutting or rewiring is required. However, because classic Mustangs have older electrical systems, it’s wise to inspect your wiring and consider upgrading to a headlight relay harness for improved voltage stability and consistent brightness.

Electrical System Considerations

Older vehicles like the 1965 Mustang may experience voltage drop due to aging wiring. While LEDs draw less current, adding a relay harness can ensure optimal power delivery directly from the battery. This improves performance and protects the factory headlight switch from overload.