Open the trunk take the plastic srew behind taillight out and move the pice of trunk rug out of the way. You should be able to see the back of the bulbs just turn them to left and they will come right out. (you did not say what year)
just change the bulb!
To change the check engine light bulb on a 1996 Crown Victoria you need to remove the molding from around the instrument panel. Next, remove the headlight knob and shafts. Locate the light bulb and turn counterclockwise to remove. Reverse directions to replace with a new bulb.
bulb # 168 ( according to the owners manual )
If you want to change just the bulb, remove the small plastic on top of the light from the engine compartment, and turn the light even with the wire harness attached, the bulb will come out.
Take the bulb out.
open trunk, remove the 4 wing nuts, remove the casing from the outside. Bulbs are in there.
1999 Ford Crown Victoria side marker light bulb replacement: Purchase the correct replacement side marker light bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement bulb information. Then consult your owner's manual for the side marker light bulb replacement procedure. As simple as it sounds, the owner's manual is the best place to start for bulb replacement instructions and illustrations.
What's wrong with it? No light, no electricity to the bulb socket, loose in ceiling...? Radioman
Open trunk, there are 4 wing nuts hold in the light casing. Once wing nuts removed, whole casing comes off from the outside.
There should be a SWITCH at the dome light! If not, remove the fuse from the fuse box above where your gas pedal is. OR: Simply remove the BULB from the dome light. duncanw.
Take the old one out, and go to your local auto parts.
With the trunk open, there are 4 wing nuts that hold the light casing in place. Remove them and pull the light casing out from the outside.