I have had the problem in the past with the Spoiler just going half way up, and as stated in other posts, either bad battery, bad connection to battery OR bad ground. How long is it since you changed your battery. Generally a battery should be changed every 4-5 years. You can get one from Walmart for approx. $100, which MAY sound a lot, BUT if your car lets you down, in the middle of nowhere OR worse still, in the middle of traffic, you will wish you replaced it. A bad battery in the Crossfire can cause all sorts of problems, and the problems will get worse as time passes. I would get your battery checked, clean and check all battery connections, including other end of ground cable, and replace battery if not really good.