Function of trunk lamp switch - GF82.20-P-4103-02A

When the trunk lid, or the tailgate on models 202.07/08/18 is open, the trunk lamp switch (S17/8)  connects one input on the PSE control module (combined) (A37)  to ground.

The contact in the switch can be opened with the trunk lid open or tailgate open by pulling out the switch tappet.