Ka 2007 battery light problem fixed very easily and very cheaply thanks to posts found on various web forums! The battery light was coming on about 10 seconds after every engine start, and was then staying on. I checked the small 3 pin plug on the alternator, and the blue wire had corroded through. It took an auto electrician 15 minutes to remove the plug and reconnect the wires using 3 mini connectors. If I had not been proactive, this could have ended up expensive….as in a mechanic probably fitting a new alternator!