Here comes a similar problem:
Have two keys to program. Tried to de active alarm but can’t. It’s gets stop but there is no sound after it stop but there is no horn. And can’t add key or erase key.
Ford must always do 2 keys with all keys lost otherwise it does not work.
Need to use bypass cable. Doesn’t matter blade or smart key.
Blade or smart key doesn’t make a difference, it’s the same process!!
You have to use the Ford AKL bypass cable to disable the active alarm.
You have to disable the alarm before you can program keys. You have to disconnect the battery and have the scan tool control on/off so as soon as power is given to the car the scan tool can disable the alarm before it goes off.