I actually have the same problem here as monty. Have had it for many months now since I haven't been able to get it in for service. I'm going to check the stuff you guys listed on here and hopefully it'll fix it.

I took it in to the dealer a few months ago and they "fixed" it. Said there was a short in my switch wiring (in the switch console above the shifter) that was causing it. They replaced this switch cluster, and it worked for about maybe 5 seconds, and I went back into the dealer. They told me that they would have to call Chrysler (this is a Chrysler dealership, mind you) and talk to them about the problem, and that they would call me back. Well, they never called me back. So I've been stuck with a broken spoiler for about, I want to say, 9 months?

I really hope your suggestions work with this new switch cluster. Wish me luck.