Missing interior light?

[Trolkar]

In Denmark it is quite cold right new! – And that seems to affect my interior light.
When opening a door, there is no light when below -5 celsius. That goes for all the doors, except the right rear door. After some hours in my garage, the light works fine with all the doors.
Where is the contacts located? – Think they need some grease or silicone…

[renaultbiler]

There is door switches mounted on the chassis in front of the door (where the hinges are).

[Trolkar]

And what about about the trunk?