brake lights aren't working

[2sdesgone]

I have an 01 Tahoe, my brake lights won't come on when I press the pedal, but the third brake light will. Also, when the headlights are on, they are on, but not when I press on the pedal. Any ideas on why and how do I fix it?

 

[greengumby]

check the bulbs then check the sockets that they are in to make sure no moisture or correction is present . There is also present a stop lamp switch located just above the brake pedal could also be the problem. also make sure the fuse is good should be since the tail lights are running

 

[sixty9fordkiller]

when i initially installed my LED tailights....i accidentally plugged them in backwards and got a similar symptom...

Solution:

Replaced rear tailight fuses under the hood on the driver's side fuse box in the engine bay

 

[scott99zx6r]

Possible turn signal switch.

 

[tast101]

When this happened to me, it was my brake light switch that's connected to the pedal I guess. Was like a $18 part and with labor made it like $100.

 

[scott99zx6r]

If the brake light switch was bad the 3rd brake light wouldnt be working.