This is a Citroen Berlingo! Nice!

Outer Wilds - what an experience!

I initially tried with those capacitors but decided to also try without them - perhaps you’re right and I broke my LDOs by doing that :/

I tried with the resistor, same thing, 0V. I made two images showing the measurements

Yes, that’s what I did and what it shows. I also attached a picture of my test setup just in case I did something wrong there

Yes, I measured across ground and Vin and it shows ~4V. Across ground and Vout 0V.