Turn signal WTF

I have a 1970 340 Dart and my turn signals stopped working along with my temp, oil pressure gauge, heater and wind shield wipers. I checked the fuses and grounds and they seam fine. I noticed today that everything works when the key is on accessory! I replaced the ignition switch a few years ago and the steering column harness about six months ago. Can anyone help? I'm not to good with the wiring side of car maintenance.

Thanks Jeff