I would first check the grounding between the truck and the trailer. If the ground is good then bulbs would be the next thing to check.
If the vehicle is equipped with a trailer light plug, the wires for the brake lights and the turn signals have been connected together, which is common, as many trailers do not have separate lights for brakes and turn signals.
Yes.
Yes.
Check the fuse first.
hazards and turn signals have separate flashers. replace flasher for turn signals
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.
i have tail lights but do not have brake lights nor do i have turn signals. i have replaced brake switch and all bulbs
try the flasser cam its under the dash
blown bulb due to short circuit, faulty ground, or broken wire
Most common problem --turn signal flasher needs replacement Could also be a problem in steering column
Day Light Running Lights.
If there is no brake lights on a 1998 Mazda pickup, check the fuse. If the fuse has blown, the lights will not work.