Adverse adjust the height of the light from the cabin

The other day I try a little drive down stack height from the cab on the controller and does not work, figure out that not even light controls OF ventilation is not di key locks the door from the inside (can be locked, only lighting does not work), will now put Is what weight, WHERE compound what or what, when I give a contact, then twice a jiffy the regulator bulb (see video) Thus, the key to the lock code, the command FROM ALL ventilation in the dark, but before you know it only at the first point in the morning, if you turn it off and turn on again will not blink more. ALL fuses ok. Whether there is any relay for lighting ?? VIDEO -> https://youtu.be/4y0afYQlQnI
HELP, CITROEN C4 2005 1.6HDI THANKS