Technically, the best way to do it is with the OBD-II tool. The shade tree way is to unhook the battery for a few minutes. Plug it back in. This will also erase the stored parameters of the computer so you will need to take the vehicle out for a drive so that it can "re-learn" how to run. 10 minutes is usually appropriate and should include several miles of on highway speeds.
how to reset the computer on a 1997 ford expedition
battery
If you want to reset the anti-theft on your 1999 Ford Expedition, you will have to have your PATS key. Many times, once you insert this key, the ant-theft system will restart.
disconnect negative battery cable
Try disconnecting the battery. This will reset computer. And may reset the transmission computer.
Some times. Go to Auto Zone they will check codes and reset your computer for free...
where is located ford expedition 1999 relays
Unplug battery for 30 minutes then plug back on that will reset the ecm
Disconnect the batter for 30 seconds and this resets the computer.
?? BUT 1999 is at front passengers floor board right panel I think.
Disconned the battery for 30 to 60 minutes. This will reset everything to factory setting.
i have a 98 ford expedition xlt the remote does not work how do i reset the alarm so it will work