This SAE Recommended Practice provides test procedures, requirements, and guidelines for high-mounted stop lamps intended for use on vehicles 2032 mm or more in overall width. This document applies to trucks, motor coaches, van type trailers, and other vehicles with permanent structure greater than 2.8 m high. This document does not apply to school buses, truck tractors, pole trailers, flat-bed trailers, and trailer converter dollies. The purpose of the high-mounted stop lamp or lamps is to provide a signal over intervening vehicles to the driver of following vehicles.
Moved SAE J1889 to referenced documents from related documents, and corrected title
Removed 2.1.2 Other Publications and moved to 2.2.4
Corrected Reference to Federal Highway Administration to Federal Motor Carrier Safety Administration
Added 2.2.4 TMC and TTMA publications, also added updated information document availability
Changed definition 3.1 and 3.2 to align better with J387
Added 3.2.3 statement that J387 is part of this document
Changed 5.1.5 to standard Warpage Test
Added 18.104.22.168 statement to photometry test to advise document users on the use of J1889 "Photometric measurements of lamps with LED light sources should use the photometry procedure described in SAE J1889 section 5.1.5."
Added 5.4 Dock Pad Heat Test
Changed 6.1.5 to standard Warpage test
Replaced Table 1 with Figures 1 and 2 as requested by Lighting Advisory Group, and changed all related references to Table 1.
Added 6.4 Added criteria for new Dock pad heat test
Sections 6.5 and 6.6 were renumbered