why is the battery light on?
I live in Winnipeg, Manitoba, Canada where it's -20c to -40c in the winter. Recently, my battery light came on while driving. I charged the battery for about 45 mins to an hour then started the car; the light never came on. Whenever I plug my engine/battery heater overnight the light stays off. But whenever i park outside without plugging in the car the light comes on when i start the vehicle. last night it came on but this time the radio started flashing and the ABS light came on as well. soon after the car died and wouldn't start. I cleaned the battery terminals, recconnected the battery, started the car and now it seems to be running ok. my question is; is the alternator to blame or could it be some other problem? The alternator seems like a pain to take out so i wanted to be sure before proceeding...thank you in advance.