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I assume you are talking about the security coding when your radio displays "SAFE" after a battery disconnect. Here is the procedure.
Anti-theft security code, inputting The security code is "fixed", meaning the radio is programmed by the radio manufacturer to accept only one code. This code must be input during the new vehicle delivery inspection, into newly installed or existing units removed and reinstalled.Prerequisites:
Inputting code/cancelling electronic lock-up
Incorrect code number If an incorrect code is entered, "SAFE" will appear in the display (first blinking and then continuous) and the radio will not function. The entire coding procedure can only be repeated one more time immediately (the number of attempts is displayed).If during the second attempt an incorrect code is entered, the radio will lock-up for approximately one hour. Leave radio switched on for 1 hour and attempt coding again when the number of attempts on display goes out (ensure proper code is available).Cycle: 2 attempts - 1 hour lock-up still applies.
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So the problem is that there is no power to the radio?
You say you checked the fuses. If the fuse is ok, then I would check the fuse on the back of the radio, if I remember correctly I believe there should be one. You will need some special radio keys to remove the radio. They are inserted into the small slots at the sides of the radio of the radio. once removed check for the fuse. if the fuse is ok or not there you must then check for power at the back of the radio. If you need more help from there let me know. When you do get power restored to the radio "SAFE" may be displayed and then follow the procedure I previously sent you.