Found my dads original 1971 duster!

dads71 said
Hey, Mattax. So quick question. I cant find any loose wires, bad connections etc. If I have the dash out, those 2 wires (red and black bolted together) it obviously now lets the car start….but should I also have power to the headlights, interior lights, signals etc (everything that doesn’t need the IVR conversion to 6 volts)?
I’ve never been able to get power to any of these yet. Or does the dash need to be installed back into the car to power this stuff up?
Sorry for the probably obvious question, the wiring end of things is just very confusing for me. Thanks

I was going to suggest trying to trace things on a wiring diagram, but the diagram I have of a '71 sucks. But then I went to my '74 diagram and struggled with that one too, so must just be too early.

Have you checked for missing/bad fuses?

Headlights won't work without the dimmer switch on the floor. Is that plugged in?

Best I can tell, looks like the turn signal switch is pretty important in the function of the lights, is that still plugged in?

Best I got. Maybe Mattax has better/more ideas.