wrong bulbs or bad earth
The brake lights.
Probably a faulty brake light switch or the brake light switch is installed incorrectly.
The rear brake 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.
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.
This is operating as intended. Brake lights are only activated when the brake pedal is pressed, irrespective of the other lights in use. It is a safety feature so vehicles behind are aware the brakes have been applied. They are separate from the tail lights so they still give a visual indication of braking whether the other lights are on or off.
adgust the brake light switch at the brake pedel under the dash
Your rt side brake light is burned out.
This is normal. The 4-way and brake light share the same bulb. The brake light overrides the 4-way when applied.
the brake light
The head light switch is shorting out ,or a bad connection
Short in wires or wired incorrectly.