MIL-S-62359(AT)
3.4.8 Lighting. All lights and reflectors shall be protected from operational hazards by mounting in recessed or otherwise guarded locations. Lights and reflectors shall not be mounted on vertical surfaces of the rub rail (unless recessed and fully protected) or on the semitrailer bumper. Turn signal lamps shall conform to SAE J588. All electrical wiring shall conform to SAE J1292. Clearance and identification lamps shall be constructed for easy removal and replacement of lamps and lenses without the use of hand tools.
3.4.8.1 Twelve-volt direct current (dc) system. A 12-volt dc lighting system conforming to 3.4.8 and 3.4.8.2 shall be provided. The 12-volt dc lighting system shall conform to Federal Motor Carrier Safety Regulations 393.14, 393.20, 393.22, 393.23, 393.25 through 393.29,
393.32 and 393.33.
3.4.8.2 Receptacle for 12-volt dc lighting system. The front of the semitrailer shall be equipped with a 7-contact receptacle conforming to SAE J560 with the connectors connected and color coded as specified therein. The receptacle shall be provided with a spring loaded cover.
The receptacle shall be located in accordance with SAE J702.
3.4.8.3 Independent 24-volt dc system. When specified (see 6.2), a 24-volt de lighting system, independent of the 12-volt dc lighting system, shall be provided. Separate wiring and bulbs shall be provided for the 24-volt dc system. The system shall conform to 3.4.8. The
24-volt dc system shall also conform to the Federal Motor Carrier Safety Regulations referenced in 3.4.8.1, except the 24-volt dc stop and turn lamps shall be combined.
3.4.8.4 Interconnected 24-volt de system. When specified (see 6.2), capability of operating the 12-volt dc system (see 3.4.8.1) from a towing vehicle equipped with a nominal
24-volt de electrical system shall be provided.
3.4.8.5 Receptacle for 24-volt dc system. When either an independent or interconnected
24-volt dc system is specified, the front of the semitrailer shall also be equipped with a 12-contact receptacle and cover conforming to MS75021, part number MS75021-1. The receptacle shall be located in accordance with SAE J702. The 24-volt dc, 12-contact receptacle shall be connected
to the lights as follows:
Contact B. Connect to left-hand turn signal and stop lamp (yellow) Contact D. Connect to ground (white)
Contact E. Connect to clearance, side marker, identification, and tail lamps (black and brown)
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