KEY TO CONTROL PANEL
WARNING AND INDICATOR LAMPS
A. ENGINE OIL WARNING LAMP
Red lamp comes on when engine oil pressure is
below engine operating limits. Lamp comes on
when oil pressure drops below 10 psi.
B . E N G I N E T E M P E R A T U R E W A R N I N G L A M P
This red lamp comes on when the engine cool-
ing system temperature is above operating limits.
The lamp comes on when engine temperature
C. DIFFERENTIAL LOCKOUT INDICATOR LAMP
Red lamp indicates when interaxle differential
lockout switch is in LOCK position and driveline
locking system is engaged.
D. PTO INDICATOR LAMP
Not used on M915A1 Vehicle.
E. PARK BRAKE INDICATOR LAMP
The red PARK BRAKE indicator comes on when
the park brake control (see item 8) is actuated.
F. HIGH BEAM INDICATOR LAMP
This blue lamp comes on when the dimmer switch
is set for high beam service lamps.
HEADLAMPS SWITCH KNOB
Pull knob halfway out to turn on the marker lamps,
tail lamps, and instrument panel lamps, or all the way
out to operate headlamps, tail lamps, marker lamps,
and instrument panel lamps. The switch also turns on
clearance lamps in either position.
3 WIPER INDICATOR LAMP
The wiper indicator comes on when you pull out the
headlamp switch to either the first or second posi-
tion. The indicator lamp is white and can be dimmed
by rotating the headlamps switch knob. Its purpose
is to aid in locating the wiper control at night.