Your fuse could be blown, or the brake light switch is improperly adjusted.
fuse, bulbs, switch on brake pedal.
the switch on brake pedal is faulty and needs replacing
Check fuses or headlight switch
It is probably the brake lights that are on due to a misinstalled or damaged brake light switch.
If your brakes lights are not working and all of your other lights are OK try replacing your "brake stop switch". You may have to have either your local auto shop or local dealer replace the switch because it's hard to do yourself. I had the same problem on my Tahoe and replacing the brake stop switch solved it right away.
The switch on your brake pedal that controls the lights is most likely stuck, try some WD40 before replacing it.
Check the bulbs, then the fuse, then the switch at the pedal.
Under the brake paddle there is a switch. You pull the switch out and replace it with another one.
Defective or out of adjustment brake light switch, if the switch is mounted on the brake lever. If the switch is on the master cylinder, then it needs replacing.
I have the same problem with my 1998 wrangler, I have been told it is the Multi-function switch in the steering column, but I have not changed it yet, can't seem to find it at local auto parts store!
On most vehicles pressing the brake pedal activates a brake light switch which is usually located near the brake pedal. It will be this switch that is faulty. Replacing it is probably the best option.
Brake light switch needs adjusting or replacing. It is too sensitive.