This SAE Recommended Practice provides definitions of common terms used in SAE Documents pertaining to motor vehicle lighting. It covers not only basic lighting terms but also terms which identify major segments of technical reports.
The following definitions were modified for the intent of consistency between standards and to improve the clarity and accuracy of the definitions with brevity:
3.1.9 LED - definition revised to ANSI standard
3.1.10 Average Rated Lab Life - definition revised
3.2.1 Adaptive Forward Light System (AFS) - revised to be consistent with J2591
3.2.7 Full AFS added
3.2.9 “Aimable” changed to “Aimed”
3.2.10 Lamp Size - definition added
3.2.13 Warning Light added
3.4.1 Stop Signal Function - definition revised
3.4.2 Stop Lamp - “lamp” added and definition revised
3.4.3 Turn Signal Lamp - “lamp” added and the text inserted “or change direction” added to the definition to be consistent with J588.
3.4.4 Center High Mounted Stop Lamp (CHMSL) - “The CHMSL Is intended to provide a signal to the both the operator of the following vehicle as well as through intervening vehicles” was added to be consistent with J1957.
3.4.5 Backup Lamp - “Lamp” and “(reversing)” added to be consistent with J593; ECE reference added
3.6.1 Parking Lamp (Front Position) - definition completely revised to be consistent with J222; the word “burning” replaced with “operating” to include the use of LEDs.
3.6.2 Tail Lamp (Rear Position) - the word “burning” replaced with “operating” to cover LED sources.
3.6.3 Sidemarker Lamp - definition revised
3.6.4 Clearance Lamp - definition changed to agree with J2042
3.6.7 Rear Fog/Tail - reference to SAE J585 added to be consistent with J1319
3.6.8 Daytime Running Light (DRL) - definition revised to agree with J2087
3.7.1 Rear Facing Cargo Lamp - Definition revised to agree with J1424
3.7.2 Side Facing Cargo Lamp - Definition revised to agree with J1424
3.7.3 License Plate Lamp - “plate” added
3.7.4 Puddle Lamp definition added
3.8.2 Headlamp - “an upper and /or lower beam “changed to “a high and /or a low beam” to be consistent with J1383
3.9.1 Auxiliary High Beam - Definition revised; J582 requires revision to allow only the use of the term “high beam” and not be interchanged with “upper and “driving”.
3.9.2 Front Cornering Lamp - Definition revised requiring changes to J852
3.9.3 Front Fog Lamp - Definition revised to agree with J583.
3.9.4 Rear Cornering Lamp - “lamp” added
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