Look inside the trunk and remove the (3) wing nuts that hold a large metal panel covering where the wires go to the back of the bulb socket, which should twist out. On the other end, open the hood and you should be able to see and/or reach the back of the light assembly where the wire goes in to the back of the bulb socket, then twist it out.
assuming you mean the light bulbs, see the answer to "how do you change turn signal lamps both front and rear on a 96 mercury grand marquis" right here in WikiAnswers.
how to change a valve cover gasket on a 97 mercury grand marquis ?
how to remove right turn signal relay on 1986 mercury grand marquis
connected to the turn signal
NO belt in the 302cid engine of a 1988 Mercury Grand Marquis. it is a chain with gears
On a 1996 Mercury Grand Marquis the windshield washer squirter button is on the end of the turn signal lever
Mercury Grand Marquis was created in 1983.
Replace the flasher relay if none of them are working.
Under dash, driver's side.
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.054 is the gap for the Mercury Grand Marquis.
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