Recently the radio and gauges on the dash stopped working suddenly and the car started to sputter. Then a few miles down the road, the car completely died.. We took the battery to O'Reilly's and they tested it and told us that it was bad. So we went and purchased a new one. It's a day and a half later and the car started to do the same thing: radio stopped working, gauges stopped working and the car started to sputter. Had a mobile mechanic come out to replace the alternator but they said it was working fine. Possibly something draining the batter. Where can we start looking? Terminals hooking up to the battery? Bad wiring?