How do change the rear liscence plate bulb on a 1998 Lincoln Town Car?

Question edited for clarity and add maker.
Question moved to model category.

There are many fuses and modules covering lighting. The likely reason is corrosion, but you can check fuses very quickly using a multimeter's probes by touching the bare visible contacts on the top of the fuse. There is no need to remove them. Set the multimeter to Ohms / Continuity.

Lincoln Town Car (1998-2002) fuses and relays...

Fuse Box Diagrams https://fuse-box.info > lincoln > lincoln-town-car-1998-... The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses. The location of the fuses ...

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Quoting from link:

https://itstillruns.com/replace-lights-lincoln-town-cars-7660993.html

Tail Lights, Stop Lights and Rear Turn Signal Lights

Turn the Town Car's engine off, and open the trunk. Remove the trunk retainer if your Town Car is equipped with one. Put on the gloves.
Pull the carpet away in order to access the tail lamp assembly. Remove the three nut-and-washer assemblies with a socket wrench.
Remove the desired bulb socket by turning it counterclockwise, and then pulling it straight out of the assembly. Pull the old bulb out of the socket, and install a new bulb. All three lights use 3457AK-type bulbs.
Place the socket back into the assembly, and reinstall the three nut-and-washer assemblies. Place the carpet back into the vehicle, reattach the trunk retainer if necessary, and close the trunk.

https://itstillruns.com/replace-lights-lincoln-town-cars-7660993.html

Change the bulbs.
GL,
Td

If the hight mount brake light is working , then your switches , fuses , relays , are OK . Most likely problem is that the bulbs themselves are burnt out , or there is a broken or loose wire.

For 1998 Lincoln Town Car 4.6L SFI 8cyl the Fuel Filter is located under vehicle, driver side, below seating area, front of rear wheelwell, mounted on chassis in fuel line.

Hope helps, remnember rated this.

check the fuses first then the bulbs

sounds like the brake light switch.

I recommend autozone if you buy the bulb from them they will assist you but I believe it has to be replaced from inside the trunk

open the trunk, and pull the linning away from the body. It should easly move. you have access to the lighting fixture. determine which is the stop light and turn the base counterclockwise to open. remove the blown bulb. To install the new, do not touch with your bare hands, use a soft cloth or paper towel to seat the bulb into its socket. reinstall by truning the bulb clockwise to seat in place. Press your linner back into place.