On my DS I have two switches. One on the dash, in the row in the center labeled courtesy lights, and the second one is in the bedroom near the speaker shut off switches.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS