Look on the side of the bulb that is now installed.
remove the felt lining in the trunk. this will allow you access to the bulbs.
There are no bulbs, it is a panel of mini-lights. You access this from the trunk area.
Replace the whole light assembly Their are no bulbs it is neon light
you will have to disassemble the rear lens by entering the trunk. If the question really is for a 1998 Ford Tempo, then the answer is - you can't because the last Ford Tempo model year is 1994!!
if you open the trunk you will find a carpeted section on the lid and in the corner of the trunk where the lights are. You need to open the access doors to the light bulbs and replace the bulbs. the sensor will need to be reset by someone that can reset the codes
Open the trunk, unfasten the plastic panel at the rear. Taillight bulbs are changed from the inside of the trunk.
3 big plastic wing nuts hold the tail light assembly in the body. remove those and the tail light can be removed to gain access to the bulbs.
The socket size for the trunk tail light on a 2001 Buick LeSabre is 7mm. Bulbs can be purchased at most local automotive repair stores.
check your ignition switch.
It sounds to me like your bulbs are out. These bulbs have a lifespan just like the light bulbs in the lamps that you have at home. These are easy and cheap to replace, and you can usually access the bulbs from your trunk, if you own a car.
First remove the gray cover behind the light in the trunk. You should then have acsess to the bulbs.
To replace the brake light bulbs on a VW Polo, pull away the carpeting in the trunk, unscrew the bolt holding the lights on, and disconnect the wiring. Replace the bulbs, put the wiring and bolts back, then replace the carpeting.