The 2001 Chevy Blazer brake lights may not work and the third bake stays on because the current light needs to be replaced. A replacement brake light can be purchased at an Auto Parts store like Pep Boys.
A third brake light is used to provide a deceleration warning to vehicles that can't see the left and right lights. You can learn more about these brake lights at the Wikipedia.
this tells you is a simple wiring problem.most likely a loose wire from the third light to the other lights.(third lights provides the power to the other lights)
Any light that stays on is not a "brake light", it's a "tail light". It's possible that they may be on at a lower level normally, and brighten when the brakes are applied, though.
wrong bulbs or bad earth
I assume you have checked/replaced the bulbs. Take a cicuit tester and check the wire harness connections under the bumper and around the trailer connector if you have one. The problem must be at that area IF all your other lights are working as you said.
it would be the brake light switch about 20 dollars at autozone
The third brake light is named for then Secretary of Transportation Elizabeth Dole and are called "dole lights".
You probably have a bad turn signal switch (inside the steering column) if this is a GM.
Chevelles never had a third brake light since the Chevelle name was dropped after 1977. However, third brake lights were first installed (and required) in 1986.
Check the bulbs - they are double filamented- smaller for stop and larger for tailights
Yes, it is the same fuse used for the rear brake lights.
New bulb needed or broken wire
we are having back brakes problems
Check the bulbs, if o/k check the wiring to it
Depending on the year, there may be one fuse for all three brake lights, or two fuses, one for the highmount brake light and one fuse for the two lower brake lights/tail lights. So, if all three brake lights are out, it could be just one fuse or perhaps the brake light switch which is on the brake pedal metal arm assembly.
The brake light, a red light shaped like a headlight on the dash means that one or more exterior lights are not working. It could be a taillight, brake light, side marker, license plate light, or third brake light. It stays on all the time if it's a side marker or any light besides the brake light. If it's the brake or third brake light it will come on only when you press the brake pedal.
the fuse should be for all brake lights and tail lights if only one is out its a bulb
Short in wires or wired incorrectly.
Fuse for the "Third" Brake LightAlthough I have no experience with the Chevy Tahoe, the systems are similar for almost all vehicles.The third brake light is tied into the wiring for the other brake lights and is protected by the SAME fuse they are.Thus, there is no separate fuse for the third brake light.Therefore, IF your other brake lights are working, then a failure of the third brake light to activate IS NOT caused by a fuse, but instead an "open circuit" condition in the "dedicated" third brakelight wiring [from where its wire "splits" off of the wiring harness to the other brake lights].This is usually caused by a connector which has become disconnected, or a cut or broken wire.
a blown bulb or loose wire.
I hate to ask , but did you check the bulbs ? The tail light portion may work fine , but the brake lights don't if both of the bulbs are bad .
There could be a separate fuse for the lower brake lights , or maybe both lower brake light bulbs are burned out
Above the brake pedal. If your main brake lights dont work but your third center brake light does, then the brake light switch is not the problem. Its is the turn signal switch.
I am not sure on a ford but i had about the same problem on a GM car i had and it was the turn signal switch i replaced it and all the brake lights worked fine you might try that
either dimmer switch or blown fuse If you are saying that the tail brake lights are working but the third brake light is not....It may be a defective turn signal switch in the steering column.