Used air conditioning thermostat switch for any 1971-73 Mercury Cougar or Ford Mustang with integral or factory A/C. Attaches to the side of the fiberglass box under the dash, the wire probe gets inserted into the evaporator. Tested and working switch. These were originally manufactured by Cutler-Hammer for Ford.
Replaces Ford part number D1ZA-19618-A or D1ZZ-19618-A.