TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 109 of 452
Table 8. Lights and Engine Retarder Switch - Continued.
Key
Control/Indicator
Function
WARNING
Before backing operations, ensure the backup alarm
override switch is in the down position. Do not
disable the alarm when personnel or equipment
safety may be sacrificed as a result. Failure to
comply may result in injury or death to personnel.
Seek medical attention in the event of an injury.
3.
BACKUP
ALARM Override
Switch (M916
through M920)
This switch is located on the control panel under the
engine retarder switch and allows the operator to
disable the backup alarm in “Quiet Zones”. Place this
switch in the up position to turn off the backup alarm.
Return the switch to the down position to activate the
backup alarm.
4.
WORK LAMPS
Switch
(M916 and M920)
This switch is located on the control panel under the
backup alarm override switch. Place this switch in the
ON position to turn the stationary work lamps on, and
the OFF position to turn off.
5.
OPERATION
Switch
CAUTION
Do not operate blackout lamps for extended periods
of time with engine off. Failure to comply may
prevent engine from starting due to run down
batteries.
This switch is a two-position switch used to select
either the blackout or service lamps, but does not turn
lamps on. The LIGHTS switch is used to turn all
lamps on and off. To operate this switch, pull the
toggle out and move to either position. This feature
prevents accidental engagement or disengagement of
the service lamps. In the NORMAL position, all
blackout lamps are inoperable and all service lamps are
operable. In the BLACKOUT position all service
lamps, backup lamps, and horn are automatically
locked out, and the blackout marker, tail, and stop
lamps will operate when the LIGHTS switch is pulled
to its first position. Pulling the LIGHTS switch to its
second position turns on the blackout drive lamps in
addition to the same blackout lamps operated in the
first position. The blackout stop lamps (brake lights)
will operate with the LIGHTS switch in either
position.
TM 9-2320-273-10
0005
0005-11
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