The radio has this feature it shows THEFTLOCK on its face. THEFTLOCK® is designed to discourage theft of the radio. It works by using a secret code to disable all radio functions whenever battery power is removed.

If THEFTLOCK® is active, the THEFTLOCK® indicator will flash when the ignition if OFF.

The THEFTLOCK® feature for the radio may be used or ignored. If ignored, the system plays normally and the radio is not protected by the feature. If THEFTLOCK® is activated, the radio will not operate if stolen.

When THEFTLOCK® is activated, the radio will display LOC to indicate a locked condition anytime the battery power is removed. If the battery loses power for any reason, you must unlock the radio with the secret code before it will operate.

The instructions which follow explain how to enter a secret code to activate the THEFTLOCK® system. It is recommended that you read through all nine steps before starting the procedure.

1. Write down any three or four-digit number from 000 to 1999 and keep it in a safe place separate from the vehicle.

Important: If you allow more than 15 seconds to elapse between any of the steps, the radio display will automatically revert to time and you must start the procedure over at Step 4.

2. Turn the ignition to the ACC or RUN position.
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 has been written down.
5. Press MIN and 000 will appear on the display.
6. Press MIN again to make the last two digits agree with the code.
7. Press HR to make the first one or two digits agree with the code.
8. Press AM-FM after you have confirmed that the code matches the secret code that was written down. The display wills how REP to let you know that you need to repeat steps five through seven to confirm the secret code.
9. Press AM-FM and this time the display will show SEC to let you know that the radio is secure. The indicator by the volume control will begin flashing when the ignition is turned OFF.

Enter the secret code as follows, pausing no more than 15 seconds between steps:

1. LOC appears when the ignition is ON.
2. Press MIN and 000 will appear on the display.
3. Press MIN again to make the last two digits agree with the code.
4. Press HR to make the first one or two digits agree with the code.
5. Press AM-FM after you have confirmed that the code matches the secret code that was written down. The display will show SEC, indicating the radio is now operable and secure.

If you enter the wring code eight times, INOP will appear on the display. You will have to wait an hour with the ignition before you can try again. When you try again, you will only have three chances to enter the correct code before INOP appears.

Enter the secret code as follows, pausing no more than 15 seconds between steps:

1. Turn the ignition to the ACC or RUN position.
2. Turn the radio off.
3. Press the 1 and 4 buttons together, Hold them down until SEC shows on the display.
4. Press MIN and 000 will appear on the display.
5. Press MIN again to make the last tow digits agree with the code.
6. Press HR to make the first one or two digits agree with the code.
7. Press AM-FM after you have confirmed that the code matches the secret code that was written down. the display will show - - -, indicating that the radio is no longer secured.

If the code entered is incorrect, SEC will appear on the display. The radio will remain secured until the correct code is entered.

When battery power is given to a secured radio, the radio will not turn on and LOC will appear on the display.

Important: Either the customers code or the factory backup code can be used in order to remove the customers code.

Perform the following steps in order to remove the customers code:

1. Turn the ignition to the ACC or RUN position.
2. Turn the radio OFF.

Important: If the display changes to -- -- -- the theft deterrent is deactivated and no code is stored.

3. Press and hold pushbuttons 1 and 4 for approximately 6 seconds until the display changes to SEC.
4. Press the HR button.
5. Set the first 2 digits (0-19) of the code with the HR button.
6. Set the next 2 digits (0-99) of the code with the MIN button.
7. Press the AM-FM button in order to enter the code.
8. The theft deterrent is deactivated when -- -- -- is displayed and then the clock is displayed.

Perform the following steps in order to add the customers code:

1. Turn the ignition to the ACC or RUN position.
2. Turn the radio OFF.

Important: If SEC is displayed the theft deterrent feature is already activated. Remove the old code before entering the new code.

3. Press and hold the pushbuttons 1 and 4 for approximately 6 seconds until the display changes to -- -- --.
4. Press the HR button.
5. Set the first 2 digits (0-19) of the code with the HR button.
6. Set the next 2 digits (0-99) with the MIN button.
7. Press the AM-FM button in order to enter the code.
8. Repeat steps 3-5 when REP then 00 are displayed. This will confirm the following:

•	The customers code

•	Activates the theft deterrent feature

•	After step 5, will display SEC in order to show the theft deterrent feature has been activated.

Important: If -- -- -- is displayed after pressing the AM-FM button, the customers code has not been entered.

9. Anytime the ignition is removed and the THEFTLOCK® is activated, the THEFTLOCK® light will flash once every 2 seconds. Anytime the battery power is cycled and the ignition is ON, the display will show LOC. The radio will then need to be unlocked by either the customers code or the factory backup code.

Perform the following steps in order to obtain the radio display code:

Important: In order to display this code, the radio should be in the LOC mode or have SEC displayed before proceeding.

1. Press and hold the pushbuttons 2 and 3 for approximately 6 seconds until the first 3 digits of the display code are displayed.
2. Write the numbers down.
3. Press the AM-FM button. The second 3 digits are displayed.
4. Write the numbers down.

After approximately 5 seconds or if another button is pressed the display returns to LOC. The display code must be unscrambled in order to acquire the factory backup code that unlocks the radio.

In order to acquire the factory backup code call Delco Electronics Corporation and enter the authorized account number along with the display code that has been written down.

In order to change the customers code perform the following:

1. Unlock the radio
2. Ensure there is no customer code currently stored in the radio.

In order to determine whether or not there is a customers code stored:

1. Press and hold the pushbuttons 1 and 4 until the display changes
2. If SEC is displayed, there is a customers code stored. Remove the stored code. Refer to Removing the Customers Code. If -- -- -- is displayed there is no code stored and a new code can be added.

If the customers code is unavailable, refer to the Dealer Communications System for the unlock procedures or call Technical Assistance.