a blown bulb or loose wire.
If there is no brake lights on a 1998 Mazda pickup, check the fuse. If the fuse has blown, the lights will not work.
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.
The brake light switch is under the dash, and whenever the brake pedal is touched the brake light comes on. If the switch has failed or is out of adjustment it will leave the brake light on.
are brake lights staying on or is brake in the dash on ?
Check the fuse, check the bulbs, then check the brake light switch.
Check stop light fuse Check bulbs double filamented smaller for brake lights Check the operation of the stop light switch Check socket for corrosion
brake light switch would be most common cause
Check bulbs - they are double filamented with smaller being for brake lights Check stop light fuse Check the operation of the brake light switch Check sockets for corrosion and ground
The most probable cause is that the brake light switch is out of adjustment.
BAD BRAKE LIGHT SWITCH AT TOP OF BRAKE PEDAL
A malfunctioning brake light and flasher relay switch will cause the brake lights and flashers to stop working. The relay switch can be found below the dashboard on the drivers side of the passenger compartment.
More than likely it is the brake light switch that is attached to the brake pedal.