Used steering column wiring harness plug aka Turn Signal Switch Harness Connector. Replacement plug for all 1970-72 Mercury Cougar and Ford Mustang, with tilt or fixed steering columns. Generic Ford part likely lots of applications between 1968-69, Ford, Mercury, & Lincoln. This plug is black, there is also a natural or white color version of this plug used by Ford 1968-69.
Ford part number D0AZ-14489-L.
*NOTE* Need help diagnosing a Cougar turn signal problem? Victor Yarberry is the world's most knowledgeable expert on the subject. Vic has owned Cougars since the 1970's and is the designer of all of our solid state sequential systems. There is no question he cannot answer! Here is a link to a great source of information on the subject.