TM 5-3810-307-10
lower right of the control plate. It is used to prevent accidental movement of the main light
control switch. The switch must be turned 45 (maximum) to UNLOCK. The following lists
each switch position and the lighting/electrical circuit affected.
Switch Position
Circuits Enabled
OFF
ALL carrier-controlled lighting, horn and alarm circuits
disabled (see Note 2)
Normal Modes
STOP LIGHT
Backup/Superstructure Driving Lights (see Note 2)
Carrier Backup Alarm
Carrier Horn
Carrier Cab Dome Light
Service Stop Lights
Service Turn Signals, front & rear
Service Hazard Signals (4-way flash)
Service Headlights: flash
Carrier Panel Lights, according to the Auxiliary switch
position: panel lights are available in all positions except OFF,
i.e., bright in BRIGHT position, dim in DIM and PARK
positions; instrument lights are constantly on in this position.
SERvice DRIVE
All as in STOP LIGHT mode above, plus:
Service Park Lights, front
Service Tail Lights
Service Marker Lights, both sides
Service Identification Lights, front & rear
Service Clearance Lights, front & rear
Service Head Lights: High/Low beam, according to the
Auxiliary Switch Position (head lights enabled in all positions
except PARK).
Blackout Modes
BlackOut MARKER
Blackout Park Lights, Front
Blackout Tail Lights
Blackout Stop Lights
Carrier Panel Lights and instrument illumination, according to
the Auxiliary switch position (See STOP LIGHT mode above)
BlackOut DRIVE
All as in BlackOut MARKER mode above, plus:
Blackout Driving Light
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