If you own a vehicle, you may find that the audio systems are equipped with an Anti-theft or radio code feature that requires a special "security code" to unlock your radio.
This radio unlock code is not required for normal operations. It's purpose is to deter a potential thief from removing the stereo.
If the factory car stereo is stolen from the vehicle, the radio becomes inoperable without the radio code. Operating the unit will require a "secret stereo unlock code" known only by the owner.
A radio code is required if you have:
Experienced a dead battery.
Disconnected the factory radio harness.
Disconnected the battery to the vehicle.
