it works just like a light bub if u take it out and its broke or tuned black it doesn't work hope this helps
check fuse panel for a blown fuse
There is a taillight fuse in the fuse panel.
check the fuse panel and the fuses
check fuse panel.
When you open the door, the side of the dash that that makes contact with the door will have a little panel that says fuse panel
There is a fuse replacement to get the dash lights to work on a 1993 Seville. The fuse for the instrument panel is located in the fuse box inside the passenger side of the trunk.
Check your fuse panel for a blown radio fuse.
it uses a 15amp fuse and goes in slot 13 in the fuse panel
Dimmer switch (rheostat burned out?) Headlight switch?
Horn Fuse # 14 ( 20 amp) in the fuse panel on the passenger side. Be sure and check fuse. Exchange with another 20 amp fuse and try horn if horn still does not work then it is the horn relay located under the hood fuse panel.
Check your fuse panel.
usually there is a fuse panel on the drivers side under the dash. all you have to do when you find the panel is figure out which fuse controls it. and in most cases there will be a diagram on the cover for the panel or one in your owners manual