On this model if the ball joint is bad the lower control arm needs replaced as you can't just replace the ball joint.
I will attach information on the control arm.
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They are not suppose to be replaced with out the arm.......if you do the same process is followed you would just press out the old one and install the new one.
Here is the information on inspecting....
NOTE: If the ball joint is equipped with a lubrication fitting, grease the joint then road test the vehicle before performing test.