my airbag light is on and want go off where do i start.

airbag light on means some fault codes stored in car, you should get a code reader to read and clear the fault codes, ELM327 Bluetooth CAN-BUS scan tool http://www.chinasinoy.com/wholesale/elm327-bluetooth-software-obd2-eobd-can-bus-scanner-tool.html this tool you can have a look.

try disconnecting and reconnecting the battery. this worked for us.