Hi. My '08 G6 3.6L cooling fans started making a serious loud noise. Looked under hood and the larger right fan has a spark arcing from the motor. It's still functioning. Thinking of just replacing the fans. But the smaller left fan is never on. Which leads to my question. Are not both fans supposed to run together? Do I just have a problem with the large fan? And if and when I replace the fans will the left fan continue to not function? Hanes service manual says not recommended to check relays without proper equipment from a dealer but I've shoveled out quite a bit of money to the dealer and want to avoid them. Any replies are much appreciated.