This is a NOS Ford power relay which is correct for all 1974 1975 1976 Ford LTD, Granada, Thunderbird, Mustang, Pinto.   It powers the rear window defroster and or deicer.   It is original Ford NOS and has never been mounted or installed.   If you need the switch which controls the rear window deicer on these same models.  just see my other listings and you will find a NOS Ford one.