To find it, you'll need to:
1. Consult a 1965 Mustang wiring diagram: This is your best bet. A factory service manual or a reproduction of one (available online or from classic car parts suppliers) will show the relay's location within the wiring schematic. The diagram will often use a symbol to represent the relay, making it easier to locate.
2. Look near the fuse box: The horn relay is usually located near the fuse box or under the dashboard, often attached to the firewall or inner fender. It's frequently a small, square or rectangular metal box.
3. Trace the horn wires: You can follow the wires leading to the horn itself. These wires will lead back to the relay. This method requires some patience and careful observation.
4. Check common areas: Owners of 1965 Mustangs have reported finding the relay in various locations near the fuse box, so look carefully around that area.
Because of the variability, there's no single definitive answer. Using a wiring diagram is strongly recommended.
