Ford Grand Marquis Owner's Manual page 191

Removing and Replacing the Tire
1. Find the jacking location notches (a
depression on plastic moulding) near the tire
that you are changing. Align the two tabs on
jack with rectangular notch on sheet metal.
Slowly push jack straight until the tabs are
against the side of the frame. MAKE SURE
THE JACK IS PROPERLY POSITIONED
UNDER THE FRAME. Turn the handle of
the jack clockwise until the wheel is
completely off the ground.
To lessen the risk of personal injury, do
not put any part of your body under the
vehicle while changing a tire. Do not start
the engine when your vehicle is on the
jack. The jack is only meant for changing
the tire.
The improper lift point
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RWARNING