What happened when the battery light came on and then went off after driving on a flooded road?

Hello car owner, this is due to the fact that after driving through the water, the belt became wet and slipped, resulting in low power output from the generator. Usually this is caused by the generator belt tensioner breaking. It's not completely broken. But the increase is no longer tight. I hope this will help you. I wish you a good car. If you have any questions about the car, ask the car master. Professional technicians at 4S stores can solve the problem within 10 minutes.