The rear auto spolier on my Crossfire is stuck in the up position and goes down on the button but does not stay down, there must be a sensor on the grearbox for this, any ideas how to cure to get it to go back to automatic operation

 

I know some issues can come from a bad battery, not sure if your symptoms line up with that scenario though

 

Yep. Try a new battery. Or possible poor connections?

 

There are limit switches involved and they may be not quite set right or damaged somehow.
There is a test procedure detailed in the service manual. Go to the post found in my signature to see the manual.