Rear Axle Light Bar; Backup Lights; Retard Lights; Brake Lights - Komatsu 930E-4SE Operation & Maintenance Manual

Operator Cab And Controls - Section 32
Page 32-26

REAR AXLE LIGHT BAR

NOTE: The brake light is functional at all times regardless of key switch position. All other lights (and the backup
alarm) are only functional with the key switch in the RUN position.

Backup Lights

Backup lights (1, Figure 32-10) illuminate when the
operator moves the directional control lever to
REVERSE. The lights can also be activated by using
the backup light switch in the cab. Using the switch
turns the lights on regardless of directional control
lever position.

Retard Lights

Retard lights (2) will illuminate when the operator
uses the retard function to slow the truck. The amber
light signals to traffic that the truck is slowing.
FIGURE 32-10. REAR AXLE LIGHT BAR
1. Backup Light
2. Retard Light
3. Brake Light

4. Backup Alarm

Brake Light
Brake light (3) will illuminate when the operator
depresses the brake pedal. The red light signals to
traffic that the truck is slowing.
Backup Alarm
Backup alarm (4) will sound when the operator
moves the directional control lever to REVERSE.
The alarm can also be turned on by using the backup
light switch. Using the switch turns the alarm on
regardless of directional control lever position.
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