Oklahoma trailer light requirements cover every vehicle towed in combination with another vehicle. This applies to any trailer, semitrailer or pole trailer. Each trailer must have at least two tail lights mounted on its rear and placed so they will emit a red light that can be seen from 1,000 feet away after dark. These lights must be mounted at a minimum height of 15 inches and a maximum height of 72 inches.
Trailers towed on Oklahoma's highways must have license plates illuminated by no more than two separate white lights, situated where the license plate can be clearly seen from 50 feet away. A license plate with more light sources is in violation of this statute.
Every trailer, semitrailer or pole trailer on Oklahoma's highways must have at least two red reflectors for the benefit of other vehicles. These reflectors must be placed no lower than 15 inches or higher than 75 inches and must be visible at night to cars traveling directly behind the trailer at 100 feet to 600 feet away.
Oklahoma trailer light requirements call for every trailer to have at least two working stop lamps that illuminate whenever the brakes are applied. The lights may be any shade of color between red and amber and must be visible from 500 feet away in normal sunlight. If the trailer's design allows it, Oklahoma statutes also call for a third stop light to be high-mounted in the center of the trailer to display a red brake light above the level of the other stop lamps.
Every vehicle on Oklahoma roads must be equipped with turn signals that flash a red or amber light to indicate that the vehicle combination is turning right or left. Turn signals should be visible from 500 feet away in normal sunlight.
