I have owned my 2006 expedition for just over a year. It came with only one Key FOB, but 2 keys, so I purchased a new one from the local store. Quickly discovered that the reprogramming sequence outlined in the manual and online, doesn't work. In fact, when I turn the key in the ignition 8 times from off to on, the locks do not cycle. Now the original Key FOB does not work and I have replaced the battery in it. I checked fuses #4 and #8, but not sure which direction to go. I assume that the key FOBs are original factory items. I have no aftermarket alarm system or remote start system.

Any ideas?

 

Your existing remote doesn't work because once you start the procedure all previous remotes are erased from memory. Since the locks aren't cycling it would seem you're not getting the 8 key cycles timed correctly.

Programming remote transmitters
It is necessary to have all (maximum of six — original and/or new) of your remote transmitters available prior to beginning this procedure. If all remote entry transmitters are not present during the programming procedure, the transmitters that are not present during programming will no longer operate the vehicle. Note: Do not press the brake pedal anytime during this sequencing, as doing so will invalidate the procedure.

To program the transmitters yourself:
• Unlock all doors using the power door lock/unlock control. Insert a key and turn the ignition from the 1 (OFF/LOCK) to the 3 (ON) position and cycle between 1 (OFF/LOCK) and 3 (ON) eight times in rapid succession (within 10 seconds) with the eighth turn ending in the 3 (ON) position. The locks will cycle to confirm that the programming mode has been entered.
• Within 20 seconds, program a remote transmitter by pressing any button on a transmitter. The locks will cycle once to confirm that the remote transmitter has been programmed. (If more than 20 seconds pass before pressing a remote transmitter button, the programming mode will exit and the procedure will have to be repeated.)
• Repeat the previous step to program additional remote transmitters.
The locks will cycle once to confirm that each remote transmitter has been programmed.
• When you have completed programming the remote transmitters, turn the ignition to the 1 (OFF/LOCK) position or wait 20 seconds. Again the doors will lock/unlock to confirm programming has been completed.

 

I meant to say that now a year later the original FOB is not working. It has been a year since I attempted to reprogram then.

I will try again though.