if you look at the enf of the wiper arm where the blade is attached, it should be "U" shaped, there is a little spring clip inside of it. With a flat blade screwdriver or pocket knife, push the tab...
The 1997 Ford Thunderbird has the most common hook-end wiper arms. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be...
I recommend using an awl for this, but a good pair of needle nose pliers will work. You'll also need a large screwdriver. First, remove the washer fluid line from the wiper. I'd use a grease pencil...