Jack up the front end of your car. Grab the tire at the top and bottom and "wiggle" it fairly strongly. It will have some play in it and kinda make a small "thump" noise if it is bad. Sometimes you can get away with tightening them up just a little bit, but better to replace. You will have to remove the tire and wheel, brake caliper and rotor, and the little metal dust cap on the rotor to gain access to the retaining nut on the spindle. There will be a cotter pin holding it in place which will have to be removed in order to loosen the nut. After the brake rotor, caliper and nut is off the rotor will come off. DO NOT LOOSE PARTS and be sure to remember how you took them off so you can reverse the removal to put them back on. My advice, pick up a Chilton manual from your local O'reilly or Auto Zone store. That will explain in better detail than I can online.
( Carter ) 1993 Mustang GT - "Blackie" - The go-getter.
1991 LX 2.3 5 Speed Hatch - Family Mustang
1969 F-100 390 4 speed - Project Rustoleum
Summit Racing and Latemodel Restoration Supply have brought me this far, my imagination will bring me all the way.