Yahoo Message Number: 82960 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/82960)
Here are 2 pictures showing the units I am talking about. The light and or actual push button is called a light cartridge.
(http://cid:X.MA1.1349448934@...)
(http://cid:X.MA2.1349448934@...)
Hope this helps.
Mikee