No headlights but has parking lights

Must have still been half asleep this morning, but its a 74 dart swinger /6 .
I checked the dimmer switch at the floor and gave it a few cycles, still nothing.
I'll pop a headlight and hook it up to a power unit tomorrow and check to see if it might just be the filaments. will update tomorrow.
How are you testing this? Your wording suggests, "you ain't." Are you checking for power at the dimmer switch? As with a test light or meter?