73 Duster no brake lights.

Coming home from a classic car cruise last night and the car behind me tells me my brake lights aren't working. When I got home I start checking the obvious, brake light switch, fuses, bulbs, etc. Bulbs and fuses are ok but Emergency flashers are not working and brake light switch has no power on either side. Tail lights and turn signals all work but the left side blinks slower than the right side. I don't have a schematic for this car so I'm not sure what all is tied to the circuit. Possible bad emergency flasher ? If I remember right its a junction point. I have a 74 duster that has same problem, but i never drive it so I haven't even looked at it. Any guidance would be appreciated.