TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 87 of 775
TM 9-2350-311-10
2–1 OPERATOR’S CONTROLS, INDICATORS, AND INSTRUMENTS — CONTINUED
2-1.1
Driver’s Controls and Indicators — Continued
15
16
17
M3 ELECTRICAL AIR HEATER
Two M3 electrical air heaters provide heated air to the driver
(M109A4/M109A5)
and cannoneer no. 2 while operating in an NBC environment.
DOME LIGHT SWITCH
Turns dome light assembly to ON or OFF.
PORTABLE INSTRUMENT PANEL
Used by driver when driver is in raised position.
2-3
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