Troubleshooting a turn signal problem requires checking several fuses and possibly the turn signal switch itself. You'll need to consult a 1964 Ford Mustang wiring diagram. These are available online through various Mustang parts suppliers and restoration sites, as well as through some dedicated automotive wiring diagram websites. The diagram will show you which fuses and relays are involved in the turn signal circuit.
Here's what you should look for in your investigation, using the wiring diagram as your guide:
* The Fuse Box (Usually Under the Dash): This box contains several fuses. The diagram will tell you which fuses are related to the turn signals, headlights, and related circuits. Check these fuses for continuity using a test light or multimeter.
* Multiple Fuses Might Be Involved: The turn signal circuit isn't necessarily protected by a single fuse. There might be a fuse for the turn signal switch, one for the turn signal lamps themselves, and potentially others related to the flasher unit.
Without the wiring diagram specific to your 1964 Mustang (coupe, convertible, etc. matters), providing a precise fuse location is impossible. Obtain a wiring diagram; it's the essential tool for this troubleshooting.
