There are two different (Well 3) Different wind sensors.
A&E Weather Pro "Lighthouse" units are the ones that are ... Not good, (personal opnion but shared by many) on this unit there is a small tower on the roof, usually above the control box which is usually near the front end of the awning, it looks like a lighthouse.
FAN IT,, when the wind speed hits around 15MPH, it should retract
The next is a Carefree they use a 3-cup "spinner" on their older units,, Same test
Newer A&T, (Do not know about carefree) uses a motion sensor in the front arm.. This one, in theory, SHOULD work.