I was having trouble with a newer battery. I kept charging without much success. Started it and let it run, but the battery never really charged up. Kept trying, and finally even with charger connected, no lights or signs of life showed.
So new battery being installed, and as soon as I touched the negative, the starter came on. No key in the ignition, and even with the power button switched to off, the starter starts cranking and will not stop.
I hate to have the thing towed 20 miles to nearest repair shop if there is an easy fix.