Originally Posted by pizzaguy
Lew:
Listen to him!
This board is FULL of stories of people suddenly being stranded due to NOTHING more than a battery. I had one that would turn the engine over, but as soon as the engine started, it would die. The car was towed to a garage ($80 for the tow) and they worked on the car an hour ($90) - and it turned out to be nothing more than a battery THAT TESTED FINE. (THis was in a Dodge Durango, but the point still applies.)
When the battery reaches 3 to 4 years of age, REPLACE IT! It's the INEXPENSIVE way out of a LOT of potential problems. I replaced mine over a year ago just because it was the original battery from 2005.
Those are possibilities, but if his also continuously tries to go down even when it's fully retracted like he said it did (after I told him my story), I would put my money on the spoiler motor (sensor). If that isn't the case, it could be a speed sensor. I know if the BAS/ESP (maybe it's the BCM, I don't really remember) system detects any difference in speeds for an extended period of time, it will deploy the spoiler.