I have a 1995 Mercury Grand Marquis and my mother has a 2003 and they both are the same, so yours probably is also. After you pull the trunk lining away so that you can see the metal, there are 3 large black plastic wing nuts that you unscrew. Once you remove those, the tail light section will come out from the front and then you can get to the bulbs to replace them.
Why ? Just replace it.
check the bottom of the steering column
where dose daytime running lamp module go on92 mercury grand marquis need to replace one
Remove the wing nuts from inside the trunk, the assembly will pop out.
I have a 1998 ford grand Marquis- and the problem is the air suspension light stays on- how to fix this problem
check your brake lights if they not worhing replace fuse or brake light switch
Have the codes read.
Fuse, loose connection, or the light switch. how do you remove the dashboard on a 94 mercury grand marque?
You won't know until you get the code read.
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.
Have vehicle scanned to determine the problem
The repair section on autozone.com explains how to change the light switch.
i have a 2002 grand marquis and when i driving on the highway at speed of 60 to 70 the light of traction control star to flash way is the problem
Perhaps your timing.
Burned out bulb?
take it to a good mechanic or a ford or merc dealer and they have to clear it for you
it is called lights control module box.It is under the sterling wheel.
this is usually caused by having a burnt out light bulb somewhere in the system.
You should be able to go under the hood and remove a cover. This should reveal the back of the light enclosure. Just remove the bulb and replace it with a brand new one.
On the left side of the steering column there is a light black tab that you pull down.
Inside the front right and left fenders, just under the side marker light, I believe. If it doesn't work at all, check the relay first.
This is not something that can be done by an amature. You need a timing light and tools. Take it to a mechanic to get it done right.
Look inside the trunk for the wing nuts to remove the unit.
It may not have one but if it does of course it will be located somewhere inside the glove box.
You can but the check engine light will remain on and it won't pass an emissions test.