Found my dads original 1971 duster!

Good for you brother. You'll have this figured out in no time. Just keep plugging away, and ask as many questions as you want.

Follow those schematics like water flowing.......From the positive, through the circuit (switches, relays etc.) and load (lights, wipers etc.), back to negative. Understand the difference between series and parallel circuits.:thumbsup:
Thanks man!!
So update: the signal lights are working! (I forgot to turn the key on when I tried them. LOL).

Map light is working

Glove box light is working

Radio circuit is working

Door buzzer is working

Console light is working

Gauges all work except the oil pressure gauge. The weird thing is that when my buddy used a test light on its terminal to see if there was power, the gauge would steadily go up as long as he held the test light on it. So weird. Any ideas?
Once I have it working and heater cables installed, I can put the dash back in :)

Great day! Tomorrow is tackling the heater cables and running harness to rear blower to get it working