M977 Through M985 General Operating Procedures (Cont)
Failure to place light switches in the OFF position
when vehicle is not in use may cause battery and/or
For FHTV model vehicles, ensure that 24V battery
disconnect switch is ON before operating lights.
d. Turn Service Drive Lights On/Off.
Lift up and hold UNLOCK lever (1).
Set lighting control lever (2) to SER DRIVE.
Let go of UNLOCK lever (1). Service headlights (3) and taillights (4)
will come on. Service stoplights (5) will light when brakes are used.
Press dimmer switch (6) with foot to use high or low headlight beam.
High beam indicator (7 or 7.1) will light when high beam is on.
Set lighting control lever (2) to OFF. Service headlights (3) and
taillights (4) will go out.