Some vehicles are equipped with an air bag system. The system must be disarmed before performing service on, or around, system components, the steering column, instrument panel components, wiring and sensors. Failure to follow the safety precautions and the disarming procedure could result in accidental air bag deployment, possible injury and unnecessary system repairs.
Make sure you have the anti-theft codes for the radio and radio presets before disconnecting the battery.
Disconnect and isolate the negative battery cable. Wait 3 minutes for the system capacitor to discharge before performing any service.