2007 MKZ son got a new car,dumped the MKZ on dad. He had a recall on the airbag and when he left dealer they forgot to reset it. Car is no longer insured. My scanner will not reset it.Battery was unhooked for 24 hours,did not clear light. If I unhook the battery and connect the pos and neg together will it drain and power in the computer ? Will that reset the light? I want to give my daughter the car with no light on it. Thanks