Check the brake light bulbs in back, one of them may installed incorrectly.
Check the brake switch under your pedal (which needs to be pushed when the brake pedal is depressed). This is what the problem was on my friends Sentra. As long as you have checked the lights and fuses, this should do it.
It could be the brake pedal switch or the rear light cluster circiut boards
brake switch try some wd40 on it first if no help then replace it. by the way it is up where the brake pedal rests under the dash.
There is a switch just above the brake pedal that is called the brake stoplight switch. When the brake pedal is released, it stops the brake lights from illuminating. Check to make sure the switch is contacting the brake pedal stop where it should. A short term method of not killing the battery would be to unplug the connector to the switch and get a new one. It won't have brake lights when disconnected so I don't recommend driving with it like that. replace the broken switch
On a 1978 Porsche 911 SC, the brake light switch is located on the brake pedal assembly. It is typically mounted on the pedal cluster, near the top of the brake pedal. To access it, you may need to remove the carpet and cover under the dashboard. The switch is activated when the brake pedal is pressed, completing the circuit for the brake lights.
When you push the brake pedal.
to the right of the brake pedal
Under the brake pedal is a brake light switch that when you press the pedal it hits it and makes your lights come on..sometimes when they get weak the pedal depresses them simply from the weight of the pedal and they stay on..Have a friend get inside the truck and pull UP on the brake pedal as you look at the lights..if the brake lights go off when they pull up on it..then it is that switch under the brake pedal
Check the brake light switch on the brake pedal
When you step on the brake pedal, you close a switch at the top of the arm that holds the pedal. That puts power to the brake lights
The brake light switch is located above the brake pedal on a 1993 Nissan Sentra. To reach the switch the driver's door needs to be opened.
manualy lift brake pedal to see if they go out. if so check spring at pedal