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.
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
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.
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
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
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.
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