[FrankM_]

On the wiring diagram, I see nothing in between the light and the power coming from Fuse I, box 1 (5A fuse). So that would be the first one to check (black wire).
The power for this fuse is 'always on' (bus 30).

I had some plastic based fuses in there that looked OK (metal strip not broken) but the plastic body melted somewhat, shortening the fuse body and making bad contact. So the best thing to do is to really get the fuse out, clean the contacts gently and put the fuse (or a new one) in to be sure.


The the switch around the bulb either connects the other bulb end to ground (brown wire) or to the door switch (brown/white wire) which connects to ground when the door opens.

If it is not the fuse/ fuse contacts (which seems to be the only common point between clock and lights) then :

Some of the wiring is 1 mm2, some 0.75 mm2 and some 0.5 mm2 - so you could have a wiring problem somewhere now (melted)
or
the issue is inside of the interior light switch (did you check it ?)

Since both interior lights do not work anymore, I am ruling out the door switches as they are individual to each side ?