Annotation of standard text SAE J849 :
This SAE Recommended Practice establishes the recommended locations for the air brake and electrical connections for towing multiple trailers. It applies to all commercial trailers except drop frame and car haul types.
SUBJECT TAXONOMY: Braking systems, Electrical, Electronics, and Avionics, Electrical systems, Parts, Trucks, Buses, Trailers
SUBFILE: Automotive
TYPE OF DOCUMENT: Ground Vehicle Standard
Stabilized: Jan 2013 