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Home > Ordnance Documents and other related manuals > > Driver's Compartment. - Od161570052
Wiring  Design.
Heater,  Defroster,  and  Ventilation  Mechanisms. - Od161570053

Introduction to the High Mobility Multi - Purpose Wheeled Vehicle (HMMWV)
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INTRODUCTION TO THE HMMWV - OD1615 - LESSON 4/TASK 1
g. Driver's Compartment.
The driver's compartment contains vehicle
control  indicators,  and  a  removable  instrument  cluster.
The  cluster
contains  gages  that  monitor the  engine  temperature,  oil  pressure,  fuel
level, vehicle speed/mileage, and battery voltage through sending units,
except the speedometer and voltmeter.  Also on the removable cluster is the
hi-beam indicator.
The WAIT TO START and BRAKE indicators are located to
the left of the steering wheel on the dash.
h. Brake Indicator.
The BRAKE indicator illuminates when a system
hydraulic failure occurs or when the parking brake is engaged.  A parallel
circuit is formed through the parking brake switch and the proportioning
valve switches if either or both switches are closed.
i. Vehicle Lighting System.
The history of motor vehicle lighting
parallels the history of the lighting of houses and other buildings, with
oil and gas lamps having been used in the early motor vehicles.  With the
development  of  a  satisfactory  electrical  system,  electric  lighting  has
become the standard means of lighting motor vehicles.
The lighting system on the HMMWV is a standard military system in which a
main switch controls the service headlights, blackout lights, directional
signals and the panel lights.  When the panel is illuminated, a lamp in the
transmission quadrant illuminates the shift lever position indicator.  The
directional signal switch is also a standard military unit.  A solid state
flasher, located under the dash next to the circuit breakers, pulses the
directional lamps and provides a hazard flashing feature.
j. Electric Horn.
A single electric horn is mounted under the hood,
forward facing, near the front of the vehicle.  It is a standard military 24
volt horn, activated by a horn button in the hub of the steering wheel.
k. Windshield Wiper.
The HMMWV includes a windshield wiper/washer
system to maintain a clear field of vision through the windshield.
This
system consists of a two-speed electric motor, two wiper blades, blade
linkage, washer reservoir, two washer jets, connecting hoses, and a motor.
The motor is located inside the vehicle at the top of the windshield; it
drives the blade linkage inside
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