Good luck finding the break. Personally, I would rather change a gearbox than fault find electrics

. Wiring can be a real nightmare, I hate electrics....LOL.....
I`m pretty sure that the wires leading to the door card lights have a conduit though, so the break might be further back in the system.
S13eater are your lights working now ? We must have jinxed them, with talikng about them

...LOL...
Regards,
Ian.