How do you reset radio after a battery change on a 1993 Lincoln town car?

To reset the radio in a 1993 Lincoln Town Car after a battery change, turn the ignition key to the "ON" position without starting the engine. Press the "AM" and "FM" buttons simultaneously for several seconds until the radio resets. If the radio requires a security code, enter the code provided in your owner's manual. Otherwise, the radio should now be functional again.