Steering column wiring harness plug aka Turn Signal Switch Harness Connector. Replacement plug for all 1968 - 1969 Mercury Cougar and Ford Mustang, with tilt or fixed steering columns. Generic Ford part likely lots of applications between 1968 - 1969, Ford, Mercury, & Lincoln.
Ford part number C8AZ-14489-S.
*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.