Fastback interior lights don't turn off

Looking for input - I pulled out all the cargo area panels in my '69 fastback cuda to add insulation and new carpet. Reinstalled the side pillar lamps and they worked properly, but next morning I discovered the lights were on (doors closed, light switch in proper position). I was really glad the bulbs are LED so didn't cause heat damage. I swapped in another headlight switch, no change - the yellow wires at both sockets stay hot with doors closed. I'm thinking I must have accidentally grounded the yellow wire somehow in putting it all back together, or is there some other explanation? Appreciate your thoughts!