1999 chevy lumina brake light dnt work but the brake light in the back window works fine. i changed the bulbs and they dnt work i dnt have the manual to the car to tell me what fuse goes to what what can i do to fix this problem?

See if bulbs have burnt out in the left brake light and rear turn signal (one bulb if combined) and also rear center high mount brake light.

If the left turn signal has a slower speed than the right turn signal, this is a symptom of a bulb or bulbs burnt out.

Usually, the wiring is not a problem, but I would not rule wiring (or sockets) as a problem out.

Good luck on this repair.

Check the brake light switch on the top of brake pedal, it's most likely the cause.

Check the bulbs and then check the wiring to make sure one of the wires has not been pinched or cut. The problem has to be somewhere between the mount light and the taillights

Check the brake light fuse if its ok then check the bulbs if they are ok then check the brake light switch. Good luck

I have a solution for you and it is your turn signal switch. I replaced mine and all of the lights work now. It is a pain to put in since you have to take off the steering wheel to replace ti but it will work after that. The switch is less than sixty dollars but ti will save you from getting a ticket

Check your bulbs. Though unusual that both would go out at the same time. I believe brake bulbs are the 1156's but not positive on the newer models. It may be posible that ifone brake light goes out it won't allow a connection to the other one. Check the filiments in both and see if you see a breakage of pieces floating around inside the bulbs.
If that is not the case then get another 12 volt battery
and run a wire to the ground wire or you can find a place on the chassis/metal part of the body, and then run a wire directly to the positive wire connecting to the brakes. If the builbs light up then you know it is an electrical problem in the wiring and will have to trouble shoot that.

the break light wire on the lumina runs through the blinker switch or multifunction switch on the colum.. check there as well as at the tail light sockets. on the late 90s gm cars the sockets had a tendancy to rot away... use a test light at the brake light wire in the trunk and have a friend apply the break. if there is power then may have to get new tail lights. or replacement bulbs.

The brake light in the rear window and the main brake lights are on a different circuit. After the signal leaves the activating switch on the brake pedal arm, it splits. One circuit goes straight to the high mount brake light, the other goes into the turn signal switch. If the rear turn signals work but the brake lights don't, suspect the turn signal switch, not the bulbs and wires. Better to check this before removing and checking bulbs, wires and fuses. It is a common problem with the W-body cars like Lumina, Monte Carlo, Buick Regal, Olds Cutlass and Pontiac Grand Prix. (Approx 94-99 models). Part number is GM 190005031 (w/o radio accessory control) or 19005032 (with radio controls)

The ground wire in the trunk area, coming from the brake light harness, might have come off or really loose. Hope this will get your lights working again. Best wishes.

i would check the bulbs first. then continue to the brake switch