1994 Buick Century Owner's Manual - Page 137

To Unlock the System After a Power Loss When battery power is reapplied to a secured radio, the radio won't turn on and "LOC" will appear on the display. Enter your secret code as follows; pause no more than 15 seconds between steps. 1. Turn the ignition on. (Radio off.) Disabling the Anti-Theft System: 1. Press the I and 4 buttons together for fiveseconds with ignition on and radio power off. The display will show "SEC," indicating the unit is in the secure mode. 2. Press the SET button. The display will show "OOO." 3. Enter the first three digits of your code following step 6 and 7of the preceding paragraphs. The display will show the numbers as entered. 2. Press the SET button. The display will show "000." 3. Enter the six digits of your code following steps 6-9 on the preceding. The display will show the numbers as entered. 4. Press the lower (BAND) knob and SEC appears, then the time, indicating that the disabling sequence was successful. 4. Press the lower (BAND) knob. The radio will display "000." 5. Enter the second three digits of the code. Thedisplay will show the numbers as entered. 6. Press the lower (BAND) knob.If the display shows "--- , the disabling sequence was successful (the numbers matched the user-selected code or the factory back-up code) and the unit is in the UNSECURED mode. If the display shows "SEC," the disabling sequence was unsuccessful and the numbers did not match either of the codes and the unit will remain in the SECURED mode. " 135