Check turn signal switch. Pull back lighty on turn signal lever and brake lights will come on. Replace switch inside steering column. The green and yellow wires you see at the bulbs are the ones that control the brake lights and turn signals.
Likely to be the brake light switch on the pedal at fault if the bulbs and fuses are good and other lights work ok.
This could be caused by a malfunctioning fuse. fuses will need to be checked. the light bulbs within the tail lights wil need to be checked. the switch under the brake pedal will need to be check to make sure it it activating properly. if all else fails it could be a wire problem and your wire system will need to be checked
If the brake lights are not coming on in your car and you have changed the bulbs and the fuses with no results, you could also check the wiring in your '98 Chevrolet Lumina. The wires may be damaged or even broken.
it maybe the brake switch
Check to stop light switch - usually located at the upper end of the brake pedal under dash area
it could be your brake light switch,or the fuse could be blown ,or the bulbs could be blown.or it could also be the turn signal switch.
Check the bulbs. If these are OK it could be the switch on the brake pedal arm.
I have asked a similar question.Ive checked the bulbs and the fuse and they are fine. There is a brake light plunger type switch attached to the upper part of the brake pedal but i havent been able to locate it yet.Its awarkward lying on your back with a torch trying to find it.
Check all the fuses. If not bulbs or switch that's all that it can be,
Could be low on brake fluid, time to have the brakes checked.
There could be a separate fuse for the lower brake lights , or maybe both lower brake light bulbs are burned out
You could have a bad brake light switch, bad bulbs, or a short in the wiring. Try changing the bulbs first. My Camry was doing the same thing. I put in new bulbs and no more problem.