The coach normally comes with a bat- wing antenna when built.
There would be a handle on ceiling with disk for raising it.
If its not there should go on roof to check and make sure there is no holes in roof, someone driving coach may have driven it with ant up and a tree limb ripped it off roof.
Here is
a link for you to check for important info for your coach.
All links below in my signature have info for your coach.
Enjoy the forum and safe travels.
Linear Mode
