How can I enter the code into my 1995 Fiesta?

It sounds like its locked out. Its a real pain in the butt ! You'll need to leave the radio switched on showing the " _ _ _ _" for 30 minutes . If I remember correctly that means leaving the ignition on the Fiesta on. After the 30 mins the " _ _ _ _ " should be flashing and you can the enter the code.

Linz
August 2005