entering code if you have gotten the correct code (if the radio was ever changed the code on file will not work - you will have to remove the radio to get serial number to get code).
When you turn the radio on, it will state code or something to that effect. You push the buttons on the radio that = the code so if it were 11221 that is what you put in, then the radio will start to work. If it beeps in the process of entering the code or if you did not enter it correctly you still have to finish the 5 digit code in order to enter it correctly. If you have not entered the correct code after 5 attempts it will lock the radio up for an hour If I recall Correctly.