Just a guess......have you looked really carefully inside the front cargo area from the outside.....walls and ceiling? Sometimes Iíve seen some rigs have their light switch up inside there.
Ken and Terry
2018 Sunseeker 2430S-CD
and if we ever need it, can be pushed by our 2017 GMC Terrain toad (4 wheels down)
Former Georgetown 330TS owner for 10 years with more mods than I can count.