folks, somehow this week a couple of unrelated items gone wrong on my faithful (hand me down) e34.

usually when i switch off the engine or when i open the doors, the interior lights (one in front and the two at the rear C pillars) automatically lights up - well now they don't. nothing wrong with the lights themselves though - they light up when i switched them on manually.

what relay or fuse could be at fault?

or something worse