Every trailer shall be equipped with at least 2 rear tail lamps that emit a red light plainly visible from at least 1,000 feet to the rear.
Trailers manufactured before June 1, 1971 shall have at least 1 tail lamp that emits a red light plainly visible from a distance of at least 300 feet to the rear.
On a combination of vehicles, only the tail lamps on the rearmost vehicle need actually be seen from the required distance.
Every trailer shall have either a tail lamp or separate lamp that illuminates the rear license plate with a white light from a distance of at least 50 feet.
After July 1, 1971, every trailer shall carry on the rear, either as part of the tail lamps or separately, 2 or more red reflectors visible from all distances between 100-600 feet behind the vehicle.
Before July 1, 1971, every trailer shall carry on the rear, either as part of the tail-lamps or separately, 1 or more red reflectors visible from all distances between 100-600 feet behind the vehicle.
Every trailer manufactured after July 1, 1971 shall be equipped with at least 2 stop lamps shaded either red or amber and visible from a distance of 300 feet, while vehicles manufactured before that date must have at least 1 stop lamp.
Every trailer manufactured after July 1, 1971 shall be equipped with electric turn signals on the front and rear of the vehicle.
Trailers and semitrailers 80 inches or more in overall width shall have: on the front, 2 clearance lamps, 1 at each side; on the rear, 2 clearance lamps, 1 at each side, and after June 1, 1971, 3 identification lamps grouped in a horizontal row, with lamp centers between 6 and 12 inches apart, and mounted on the permanent structure of the vehicle as close as practicable to the vertical centerline; on each side, 2 side marker lamps, 1 at or near the front and 1 at or near the rear; and on each side, 2 reflectors, 1 at or near the front and 1 at or near the side.
Rear reflectors on pole trailers may be mounted on each side of the bolster or load.
Clearance lamps shall be mounted so as to indicate the extreme width of the motor vehicle, not including mirrors, and as near the top of the vehicle as practicable.
When rear identification lamps are mounted at the extreme height of the vehicle, rear clearance lamps may be mounted at an optional height.
When mounting of the front clearance lamps at the highest point of a trailer results in those lamps failing to mark the extreme width of the trailer, they may be mounted at an optional height, but must indicate the extreme width of the trailer.
Front, side, and rear clearance and identification lamps shall be capable of being seen at all distances between 500 and 50 feet from the front and rear, respectively.