73 duster dash lights

Never have worked ? I'll bet they did. If they never worked during the time ou've owned the car... There is one fuse that doesn't show any power at either end until the park lamps are pulled on. If a new fuse there will blow immediately when the park lamps are pulled on... Orange wires are the ones to inspect. These go to radio, ash tray, many more places.
If the ignition switch has ever been replaced, the orange wire going to the column shift indicator may be in the wrong position in the switch connector. I've seen this before. Hope this helps.