Disconnecting that battery does some spooky ****. One of the major mags doing road test had a test car with a bad battery connections and it did some really wild stuff during the test as the computer kept getting confused. It was Motor Trend or another really high circulation periodical. Naturally they panned our lovable vehicles. That must have really screwed up sales. My dealer had put three batteries and a new alternator in my SRT before they discovered the connection problem.