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|  MIL-T-2452J
3.4.2.2 Ignition system (gasoline). For gasoline engine driven vehicles, a 12-volt dc
ignition system shall be furnished. An alternator of not less than 40-ampere rated capacity and
which provides not less than 16 amperes dc output at normal engine idle speed shall be
furnished.
*
3.4.2.3 Lighting. All vehicle lights and reflectors shall conform to Federal Motor Carrier
Safety Regulations 393.12, 393.19, 393.20, and 393.22 through 393.26(d). When available as
the manufacturer's standard or optional feature, the brake lights shall override the four-way
emergency flasher. Identification, side marker, and clearance lights shall be of the armored or
recessed type with the exception of those lights installed on the roof of the truck cab. Shock and
vibration reduction means shall be provided to prolong the filament life of all lights. Stoplights,
taillights, and turn signal lights shall be installed on the rear at a height of not more than
60 inches from the ground, and shall remain visible to overtaking traffic while personnel are
riding on the steps. The lights shall be protected, either by recessed mounting below or behind
impact surfaces, or by guards equal in strength to 6-inch diameter standard weight pipe.
3.4.2.4 Turn signals. Turn signal lamps shall conform to SAE J588. Operating units
shall conform to SAE J589, class A, and shall be mounted on the steering column. The vehicle
shall be provided with double-faced front signal units and with single faced rear signal units,
installed in accordance with SAE J588. Turn signals shall not be mounted on the engine
compartment hood. Turn signal operating units shall have visible and audible type flash
indicators.
*
3.4.2.5 Batteries. Each battery shall be of 12-volt potential. The total reserve capacity
ratings and the total cold cranking ampere ratings at 0F, both measured in accordance with
SAE J537, shall be not less than specified in table III. The batteries shall be of the
maintenance-free type, having the maintenance-free characteristics listed in W-B-131.
TABLE III. Batteries.
Reserve capacity
Cold cranking
Engine type
(minutes)
(amperes)
Diesel (less than 220 gross
320
1,200
horsepower)
*
Diesel (220 gross
480
1,740
horsepower
and over)
Gasoline
100
450
11
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