Door contact switch/footroom lighting

Hello.

something else: with my passenger door the control switch is obviously hanging in the door - i.e. in the dashboard the symbol for open doors remains and the footroom lighting also. If you knock on the door, the switch triggers. After 2-3 door locks, however, he stays suspended again.

Where is the contact switch exactly? In the door lock (as the hook that then accesses at the Holm) or behind it? How do you get it? It just a bit annoys if the lighting is missing :-(. WD40 has done nothing, mechanics are at least externally well lubricated and smooth.

vesruche me just whbs original to buy - then I don't have to bother with such questions anymore :-)