TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
h. LIGHTS.
The vehicle lighting system consists of the left and right headlight assemblies, left and right taillight assemblies,
stoplight switch, dimmer switch, domelights, driver’s night viewer and light switch assembly.
The driver’s instrument panel lights consist of the HIGH BEAM indicator light, GLOW PLUG WAIT light,
PARKING BRAKE indicator light, and one panel light for illumination of the tachometer and speedometer.
The portable instrument panel lights consist of the MASTER indicator light, MASTER WARNING light, LOW
COOLANT light, and two panel lights for illumination of the portable instrument panel.
Lights associated with the accessory control box consist of the HEATER indicator light, EXHAUST indicator
light, and two panel lights for illumination of the accessory control box panel. Miscellaneous lighting consists
of one MASTER indicator light located on the steering shaft and another located on the enclosure assembly in
the crew compartment. The M3 electrical air heater is equipped with an ON/OFF indicator light.
The relationship of the vehicle lighting system and related individual components is shown on the wiring
diagrams (para 6-88).
When the MASTER switch is turned ON, 24 vdc is supplied through the MASTER relay to the circuit breaker
panel. Circuit breakers 1,2,4 and 6 distribute the power to the various lamps, LEDs and controlling switches.
AMMO COMPARTMENT DOME LIGHT CIRCUIT
2-134
