Spoiler Position

On Base/Limited/SE models, the electric wing can cause issues with top operation. The BCM knows (or thinks it knows) the position of the wing at all times. If you try to put the top up or down when the wing is not EITHER fully UP or fully DOWN, the BCM will tell the PTCM to NOT move the top. You will get a blinking light and a 'beep'. MOST of the time, the wing will actually be in a valid position, but for what ever reason, the BCM has lost track of what is going on with the wing. This can (apparently) be caused by such things as a weak battery, bad spoiler travel sensor, or water intrusion in the area around the wing motor (which causes a bad spoiler travel sensor). I call this "a loss of sync(ronization) between the wing and the BCM."

In some cases, shutting off the engine and yanking the battery ground cable off for a few seconds will reset the BCM's logic and fix this. It is very hard to KNOW that this is the issue, unless you take the car to someone with a STAR diagnostic computer - a rare item these days.