This SAE Recommended Practice covers the application of primary wiring distribution system harnesses to automotive, truck, and similar Motor Coach vehicles. This is written principally for new vehicles but is also applicable to rewiring and service. It covers the areas of performance, operating integrity, efficiency, economy, uniformity, facility of manufacturing and service. This practice applies to wiring systems of less than 50 V.
This document is being revised to remove the references made to Truck, Truck Tractor and Trailer per the agreement between the SAE Truck and Bus Electrical Systems Subcommittee and the SAE Electrical Distribution System Standards Committee. The Truck and Bus committee has replaced the referenced documents with newer SAE documents. The documents that supersede SAE J1292 are SAE 2174 "Heavy Duty Wiring Systems for Trailers more than 2032 MM or More in Width" and SAE J2202 "Heavy Duty Wiring Systems For On Highway Trucks".