Usually this is caused by the physical position of the brake light switch not being adjusted properly.
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
Check switch under pedal & make sure is turning off when not applied.
It's probably your Alternator that is going bad. That is if the battery and brake lights came on at the same time.
Brake lights draw their energy from the vehicle's battery.
The brake lights in your 1983 Nissan pickup truck are controlled by the brake light relay switch. When the brake light relay switch malfunctions the brake lights will stop working.
There is no switch to activate or deactivate the brake lights on a 1988 Nissan. The brake lights automatically turn on any time the brakes are pressed.
check your fusible link, its connected to your positive battery cable,check for burnt marks or it might be swollen.
They are tied to either the brake lights or the tail lights.
The brake light switch on a Nissan is located just behind the brake pedal. It sends a signal to the brake lights when the pedal is pressed to turn them on.
the connection between the battery and the brake lights
the brake light driver side not working
Are the brake lights operational? Are you having any battery recharging issues? If not, I'd be looking at circuit issues such as an open/loose ground or relay malfunction. Good Luck! Dub