2003 Mercury Grand Marquis Owner Guide 4th Printing - Page 104

Locks and Security 1. Insert the first previously programmed coded key into the 4 ignition and turn the ignition from 3 3 (OFF) to 4 (ON) (maintain ignition 5 in 4 (ON) for at least one second). 2. Turn ignition to 3 (OFF) then 2 2 (LOCK) and remove the first coded key from the ignition. 1 3. Within ten seconds of removing the first coded key, insert the second previously programmed coded key into the ignition and turn the ignition from 3 (OFF) to 4 (ON) (maintain ignition in 4 (ON) for at least one second but no more than ten seconds). 4. Turn the ignition to 3 (OFF) then 2 (LOCK) and remove the second coded key from the ignition. 5. Within twenty seconds of removing the second coded key, insert the new unprogrammed key (new key) into the ignition and turn the ignition from 3 (OFF) to 4 (ON) (maintain ignition in 4 (ON) for at least one second). This step will program your new key. 6. To program additional new unprogrammed key(s), repeat this procedure from step 1. If successful, the new coded key(s) will start the vehicle's engine and the theft indicator will illuminate for three seconds and then go out. If not successful, the new coded key(s) will not start the vehicle's engine and the theft indicator will flash on and off. You may repeat steps 1 through 6. If failure repeats, bring your vehicle to your dealership to have the new spare key(s) programmed. 104 2003 Grand Marquis (grn) Owners Guide (post-2002-fmt) USA English (fus)