Interior and dash lights

So I was giving a friend a ride in the Barracuda (69) and was showing him that the "cigar lighter even works" and when the lighter popped the map light right below it came on. But only the front map light, not the rear courtesy lights. I started trying a couple of things and when I rotate the headlight switch to turn on the interior lights the rear lights come on and front map light shuts off. If I turn the headlights off completely the map light turns off but if the headlight switch is on, either full or parking lights, the map light comes on. The rear lights still function correctly when the doors open and close but the map light doesn't come on with them anymore. And the cluster/dash lights no longer work. I'm going to pull out the wiring diagram to see if I can figure this out but electrical is definitely not my strength lol. Any help is appreciated. I did check the map light bulb to make sure it was seated correctly and seems fine. One clue may be that the cigar lighter doesn't work anymore, I suspect this could be the issue or maybe a grounding problem.