MIL-DTL-46821D(AT)
3.2.7.3 Engine starting circuit. With the loader in operating condition, properly serviced,
and with the drive selector in "N" position, the starting circuit shall function as follows when the
starter switch is operated as follows (see 4.6.4):
a. With the ignition switch "OFF" and the starter switch in the engine starting
position, the starter motor shall operate, but the engine shall not start.
b. With the ignition switch at "ON" and the starter switch in the engine starting
position, the starter motor shall operate, and the engine shall start.
3.2.7.4 Lights. Normal headlights and taillights, blackout headlights and taillights, and all
instrument panel lights shall conform to applicable drawings. All electrical contacts and
connections shall maintain positive contact under all loader operating conditions (see 2.2.2
and 4.6.4).
3.2.7.4.1 Lighting circuits. With light switch assembly on the instrument panel adjusted
as shown in table I, lights shall operate as specified herein (see 4.6.4).
Table I. Instrument panel lights.
Switch setting and operating conditions
Light conditions
Main light switch at "off"
No carrier lights operate.
Main light switch at "service drive"
Head and tail lights on.
a. Dimmer switch operated
Headlight beam changes.
b. Brakes applied
Stop light on.
c. Brakes released
Stop light off.
Main light switch at "stop light"
Headlights off, tail lights off.
a. Brakes applied
Stop light on.
b. Brakes released
Stop light off.
Main light switch at blackout (bo) marker
Bo marker and bo tail lights on.
a. Brakes applied
Bo stop light on.
b. Brakes released
Bo stop light off.
Main light switch at bo drive
Bo drive light, bo marker, and bo tail
lights on.
a. Brakes applied
Bo stop light on.
b. Brakes released
Bo stop light off.
Main light switch at any setting except "Off"
Lights operate as specified above,
and panel light switch at setting as
as applicable.
follows:
a. "Off" position
Instrument panel lights off.
b. Park
Instrument panel lights on.
c. Dim
Instrument panel lights dim.
d. Panel bright
Instrument panel lights bright.
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