I tried our XM radio and it would give the error of no antenna. I got the schematics for the roof from THOR and found where the antenna should be, and it looks like it was sheared off. I have pictures of the roof a few days after getting the RV and shows it's not there. The antenna is on order along with a new radio (different issue).
Wayne & Elissa
2021 THOR Four Winds 28A
Watchdog hardwired EMS, Alignment, Roadmaster front sway bar, vent covers, Dew Gutter