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 108 of 452
Table 8. Lights and Engine Retarder Switch
.
1
2
3
4
5
Figure 8. Lights and Engine Retarder Switch.
Key
Control/Indicator
Function
1.
LIGHTS Switch
CAUTION
Do not operate service lamps for extended periods
of time with engine off. Failure to comply may
prevent engine from starting due to run down
batteries.
The LIGHTS switch is a combination switch and
rheostat that controls all tractor service lamps. Pulling
the LIGHTS switch knob out to the first position turns
on the marker/turn signal lamps, service tail and stop
lamps, clearance lamps, and instrument panel lamps.
Pulling the LIGHT switch knob out to the second
position turns on the service head lamps in addition to
the same lamps operated in the first position. Turning
the LIGHTS switch knob when in the first or second
position will dim or brighten the instrument panel
lights.
2.
ENGINE
RETARDER
Switch
This switch is located on the control panel to the right
of the LIGHTS switch and controls the number of
engine cylinders activated when the engine retarder
foot switch is depressed. The HIGH position
designates all 6 cylinders for maximum engine
braking, MED position designates 4 cylinders, and
LOW position provides 2 cylinders for minimum
engine braking.
TM 9-2320-273-10
0005
0005-10
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