1998 Oldsmobile Aurora Owner's Manual - Page 172
1998 Oldsmobile Aurora Manual
Page 172 highlights
Activating the Theft-Deterrent Feature The instructions which follow explain how to enter your secret code to activate the THEFTLOCK system. It is recommended that you read through all nine steps before starting the procedure. NOTE: If you allow more than 15 seconds to elapse between any steps, the radio automatically reverts to time and you must start theprocedure over at Step 4. 1. Write down any three or four-digitnumber from 000 to 1999 and keep it in a safeplace separate from the vehicle. 8. Press AM-FM after you have confirmed that the code matches the secret code you have written down. The display will show REP to letyou know that you need to repeat Steps 5through 7 to confirm your secret code. 9. Press AM-FM and this time the display will show SEC to let you know that your radio is secure. Unlocking the Theft-Deterrent Feature After a Power Loss Enter your secret code as follows; pause no more than 15 seconds between steps: 2. Turn the ignition to ACCESSORY or RUN. 1. LOC appears when the ignition is on. 2. Press MN and 000 will appear on the display. 3. Turn the radio off. 4. Press the 1 and 4 buttons together. Hold them down until --- shows on the display. Next you will use the secret code number which you have written down. 5. Press MN and 000 will appear on the display. 6. Press MN again to make the last two digits agree with your code. 7. Press HR to make the first one or two digits agree with your code. 3. Press MN again to make the last two digits agree with your code. 4. Press HR to make the first one ortwo digits agree with your code. 5. Press AM-FM after you have confirmed that the code matches the secret code you have written down. The display will show SEC, indicating the radio is now operable and secure. 3-22