I went and got a free (my parents had a free one from going there so much throughout the years) oil change from the ford dealership the other day and they made me aware i needed new brake pads. He quoted me over $400 and i told him not to worry about it since i could just do it myself for under half that price. He then proceeded to tell me that my rear passenger side brake pad is really bad and that it might be locking up. Ever since then i have noticed my car pulling to the right . What does that mean and is there any way I can check to see if it is locking up? Thanks!