The 1992 grand marquis has rear drum brakes.
92 grand marqs also has optional discs. To remove the calipers, simply loosen the two large bolts holding the calipers. then compress the piston back with a C-clamp using the old pad as a base. place the caliper on the mount, replace the bolts and hit the brakes once to check for contact. Also, it is a good idea to grease the sliding bolts.
I would direct you to a very similar question concerning 1994 Marqs:
How do you access the rear drum brakes on a 1994 Grand Marquis
and the answer I provided therein.
"I know that 1992+ are discs, but the rears have drums built into them for the emergency brake.  However, to access the rear emergency brake pads is a different process than is typical for a rear drum setup.
It involves removing the axle shafts, so I would recommend taking it to a shop."
Concerning the above statement, emergency brake pad/hardware replacement on a rear-disc equiped Mercury Marquis involves no such thing! The e-brake is simply a mini-drum brake type assembly within the disc itself. As with most drum brake-equiped vehicles, there's an access slot on the backing plate to back the adjustment off, allowing disc removal in cases where the e-brake shoes have worn into the rotor drum (for lack of a better term). Occasionally this slot doesn't quite line up with the adjuster, but it is there! To those researching such a relatively simple procedure, don't let morons like the individual who posted above confuse you with their misinformation.
FIRST REMOVE THE WHEEL.THEN REMOVE THE TWO BOLTS HOLDING THE CALIPER TO THE BRACKET.THEN REMOVE THE TWO BOLTS TO REMOVE BRACKET. REVERSE TO REINSTALL.
Remove the wing nuts from inside the trunk, the assembly will pop out.
Look inside the trunk for the wing nuts to remove the unit.
i have a 95 mercury grand marquis how do i remove the passtime device You should NOT unless you paid off the car. the dealership will then remove it.
The plugs are under the coil. Just remove the coil and there they are.
The repair section on autozone.com explains how to change the light switch.
there is a coil on each one. remove the coil and there is the plug.
Remove the wiring harness from the tail light assembly in your 2005 Mercury. Remove the tail light assembly retaining bolts. The tail light assembly will come out.
Remove the belt from your 1997 Mercury Grand Marquis air conditioning compressor. Remove the air conditioning hoses. Remove the air conditioning compressor retaining bolts.
i'm asking the question
Remove the spark plug wire from your 2001 Mercury Grand Marquis. Remove the spark plug with a 5/8 deep well socket, white turning it to the left. Reverse the process to put in the new spark plug.
Just remove the coil on top of the plug.