Keyless Entry Code Location

Hoping someone can tell me the location of the module containing the code for the keyless entry. Thanks, in advance. Sorry, this is for the 2004 Ford Focus. Tom

I heard that if you turn your car to "on" position and "off" 4 times in 6 sec. You will hear a "bing". Then press the unlock button on the remote, it should set it to the remote. Give it a try and tell me.