S211estate

Hi, I’m a newbie to the board here.

I wanted to try some LED bulbs on the D-pillar lights. I removed the original halogen bulb (while the light is still on) and installed the LED. It didn’t light up, so I put the original bulb back on again. And now the original bulb doesn’t turn on either. Both D-pillars and tailgate light are all stoped working

I know I should’ve worked on it when the lights are off…
Do you think the circuit got shorted somewhere? What should I look for?
Any help would be appreciated!