TM-9-2320-272-10

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 211 of 481

TM 9-2320-272-10

2-110

Change 2

2-18. OPERATION OF VEHICLE SERVICE LIGHTS (Contd)

a.

Service Lights.

NOTE

Unlock lever must be in UNLOCK position to move main switch

to any position other than BO MARKER.

(1)

To illuminate instrument panel, turn main switch (4) to either STOP

LIGHT, SERVICE DRIVE, BO MARKER, or BO DRIVE position.

(2)

To brighten or dim instrument panel illumination, move auxiliary switch

(6) to either PANEL BRT or DIM position.

(3)

For normal daylight driving, turn main switch (4) to STOP LIGHT

position.

(4)

For night driving, turn main switch (4) to SERVICE DRIVE position.

(5)

In blackout operation:

(a)

Turn main switch (4) to BO DRIVE position before driving vehicle.

(b)

Turn main switch (4) to BO MARKER position after stopping

vehicle.

(6)

To illuminate parked vehicle at night, turn main switch (4) to SERVICE

DRIVE position and auxiliary switch (6) to PARK position.

b.

Turn Signal and Hazard Warning Lights Tab Button.

NOTE

• Turn signal control lever must be moved to center position after

completing turn.

• When the hazard warning light/emergency flashers are in use,

they override the brake light/stop light operation. When

driving, exercise caution and be prepared to use hand signals to

indicate a stop.

(1)

For right turns, move turn signal control lever (1) upward towards

windshield (3). For left turns, move lever (1) downward away from windshield (3).