Programming Instructions for 2003 Mercury Grand Marquis Remote Fob
1. Obtain all remote transmitters including existing working remotes.2. Turn the ignition from OFF to RUN 4 times within 3 seconds.
3. Doors should lock then unlock indicating that the vehicle is in the programming mode.
4. Within 7.5 seconds:
Press any button on the first remote transmitter.
Doors should lock then unlock.
Within 7.5 seconds:
Press any button on the second remote transmitter.
Doors should lock then unlock.
Within 7.5 seconds:
Repeat step 4 for for all other remotes
5. Wait 7.5 seconds and then turn ignition OFF
6. Wait 20 seconds and then confirm programming by locking and unlocking vehicle.
Please Note: a maximum of 4 remote transmitters can be programmed to the same vehicle.
Key Programming Information for 2003 Mercury Grand Marquis
You must have 2 original Ford keys that start your engine to perform this procedure. If you only have one working key or none at all it must be programmed by a dealer or locksmith! Your New third (unprogrammed) key must also be cut prior to performing this procedure. Please Note: If one of your keys is a cloned key from a hardware store this procedure will NOT work. This procedure requires original programmed keys.1. Insert an existing (working) key into the ignition cylinder.
2. Turn the ignition cylinder ON (just shy of starting the car Without cranking the engine) and back to OFF. Ignition should stay in ON position for at least one second.
3. Remove the existing key and WITHIN TEN SECONDS, insert a second working key and turn to ON and then back to OFF. Ignition must be on for at least one second but no more than ten seconds. Remove key.
4. Insert the New (unprogrammed) key before twenty seconds have elapsed and turn to ON. Leave it in the ON position for at least one second and turn back to OFF.
5. The security light will light up for THREE seconds to indicate the new key has been successfully programmed.
For those who do not have 2 original keys: These keys can NOT be programmed at hardware stores like Ace, Lowes, Walmart, & Home Depot. They must be programmed by an automotive locksmith or dealership.
www.keyfobprogram.com/fd2
Use our Locksmith Search if you need professional help.