This proposal concerns lamps equipped with several light sources and fitted with an operating tell-tale that indicates the failure of any one of these light sources. The current provisions for the failure of one light source (the “N-1” requirement) are difficult to apply as a complete photometric check for all possible combinations of light source failure is required. The revised text follows the approach of supplement 17 to Regulation No. 87 and removes the requirement to check the complete photometric requirement, in case of failure of any light source, when the lamp is fitted on the vehicle with an operating tell-tale.

Proposal to amend the test procedure for reversing lamps and maneuvering lamps equipped with light sources other than filament lamps. Currently, the lamps are required to meet photometric parameters after one minute and 30 minutes of operation. Under normal use, these lamps are operated for no more than six minutes at a time. This proposal would set the second measurement point at 10 minutes rather than 30 minutes. This change would also align the procedure with SAE standard J1889.1.