68 Barracuda Instrument lights not working
A lot of excellent information in this thread.
If you have a multi-meter or test light, one approach is to test whether there is power present for the circuit at the fusebox.
The instrumentation, radio and gear selectot lights get power from the end fuse in the box. Its a 2 or 3 amp fuse.
The convertible interior lights always have power. They get power from a fuse shared with other lights such as rear lights.
Blinkers are not fused in '68 - seperate circuit.
Headlights are also seperate circuit - circuit breaker insight the switch.
The headlights switch is really a multifunction switch, with three circuits going through it.