This SAE Recommended Practice provides test procedures, requirements, and guidelines for side turn signal lamps intended for use on trailers 12 m or more in overall length except pole trailers. Side turn signal lamps conforming to the requirements of this document may be used on other large vehicles such as trucks, truck tractors, buses, and other applications where this type of lighting device is desirable.
SAE J2039-2001 history
2020SAE J2039-2020 Side Turn Signal Lamps for Long Vehicles
2014SAE J2039-2014 Side Turn Signal Lamps for Long Vehicles
2001SAE J2039-2001 Side Turn Signal Lamps for Large Vehicles
1994SAE J2039-1994 Side Turn Signal Lamps for Large Vehicles@ Recommended Practice (June 1994)