any one know if you can program a 2nd key to a 2004 expedition when you have one key that works my 2nd key stoped working. i can program keys when you have two working keys

 

I am pretty sure you will need to have 2 working keys to program a new key in. A trip to the dealer (ouch!)or if you can find someone else with the right kind of scan tool (a shop that does tuning might have one). I would buy 2 keys off of ebay, get them cut (usually hardware stores do this for free) and get 1 programed in. After you get it back do the other one yourself so you should always have at least 2 keys if you ver need to go through this again.

 

This is straight from the owners manual of a 2004 Navigator. But its the same system.

Your vehicle is supplied with two coded keys. Only a coded key will
start your vehicle. Spare coded keys can be purchased from your
dealership. Your dealership can program your key or you can “do it
yourself.” Refer to the Programming spare keys section in this chapter.
The following items may prevent the vehicle from starting:
• Large metallic objects
• Electronic devices on the key chain that can be used to purchase
gasoline or similar items
• A second key on the same key ring as the coded key
If any of these items are present, you need to keep these objects from
touching the coded key while starting the engine. These objects and
devices cannot damage the coded key, but can cause a momentary “no
start” condition if they are too close to the key during engine start. If a
problem occurs, turn ignition to the OFF position and restart the engine
with all other objects on the key ring held away from the ignition key.
Check to make sure the coded key is an approved Lincoln coded key.
If your keys are lost or stolen you will need to do the following:
• Use your spare key to start the vehicle, or
• Have your vehicle towed to a dealership or a locksmith. The key codes
will need to be erased from your vehicle and new key codes will need
to be re-coded.
Replacing coded keys can be very costly and you may want to store an
extra programmed key away from the vehicle in a safe place to prevent
an unforeseen inconvenience.
The correct coded key must be used for your vehicle. The use of the
wrong type of coded key may lead to a “no start” condition.
If an unprogrammed key is used in the ignition it will cause a “no
start” condition.
Programming spare keys
A maximum of eight keys can be coded to your vehicle. Only
SecuriLock
keys can be used. To program a coded key yourself, you
will need two previously programmed coded keys (keys that already
operate your vehicle’s engine) and the new unprogrammed key(s) readily
accessible for timely implementation of each step in the procedure.
If two previously programmed coded keys are not available, you must
bring your vehicle to your dealership to have the spare coded key(s)
programmed.

 

So WHAT IS the procedure for doing it yourself? The information, or a link would be helpful.

 

Quote from the F150online forums

^^^^^

Take the two keys you already have. Insert the first key into your ignition and turn the ignition on, but do not start the truck. Keep the key in the ignition for at least one second. Take the first key out and within 5 seconds insert the second key and turn the ignition on, but do not start the truck. Keep the key in the ignition for at least one second. Take the second key out and within 10 seconds insert the new key and turn the ignition and turn the ignition on, but do not start the truck. Keep the new key in the ignition for at least one second. Turn the ignition off then try to start the truck with the new key.

If the process worked for the first key repeat for second key

 

THANK YOU for the most helpful key procedure.

 

Yeah. Sucks...

My old 00 EB and the current EB only came with one key. Of course...

Haven't yet found it necessary to pay a dealership an hour's worth of labor, or what ever they please to charge you for the programming.

Hence, I have had to get by with only one key. Maybe the next one will have two keys from the very beginning...

 

Modified,


Your quite welcome

 

Local locksmith did mine for about $50.00. Had Walmart cut second and third keys that I bought off ebay. They did it for free. Had locksmith program second key and programmed third key myself.