AUTOMOTIVE ELECTRICAL CIRCUITS AND WIRING

Figure 2-63.- Accepted beam pattern for aiming passenger vehicle headlights.
Figure 2-64.- Accepted beam pattern for a four-headlight system.
BLACKOUT LIGHTS
Blackout lighting is a requirement for certain combat operations. The purposes of
blackout lighting are as follows:
To provide the vehicle operator with sufficient light to operate the vehicle in total
darkness
To provide minimum lighting to show vehicle position to a leading or trailing vehicle
when illumination must be restricted to a level not visible to a distant enemy
The three types of blackout lighting are as follows:
The BLACKOUT DRIVING LIGHT (fig. 2-65) is designed to provide a white light of
25 to 50 candlepower at a distance of 10 feet directly in front of the light. The light is
shielded so that the top of the low beam is directed not less than 2 degrees below the
horizon. The beam distribution on a level road at 100 feet from the light is 30 feet
wide.
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