You should have MCD shades on a 2008. They never lose their programming. When you jump those wires, you should hear a beep sound. VERY faint. So, be close to the shade and have NO other sound distractions. Is your switch a square type mounted on the wall side panel? Or do you have a spring loaded switch on the dash console? If you have a spring loaded switch, then the programming wires are not really used. There are 2 brands Tiffin used for the shades---MCD (I am not sure when they stopped using them) and AUTO MOTION. Which Tiffin has used for at least the past 6 or 7 years if not longer. It is COMMON for the Auto Motion shades to have a defective motor and they stop. Use the link below to determine which you have. Doug
http://automotionshade.com/English/Support.aspx?pageUser=0http://automotionshade.com/English/Support.aspx?pageUser=0
http://mcdinnovations.com/owners-manualhttp://mcdinnovations.com/owners-manual