July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Trunk Room Light Switch
WARNING: This page is about a different car, the 2001 Subaru Outback and 2001 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Check continuity between terminals.
Fig 1: Checking Continuity Between Trunk Room Light Switch Terminals