Hitachi ZW180 Technical Manual page 90

Reverse Traveling Alarm Control
(Refer to the SYSTEM/Electric System group.)
Purpose: To sound the alarm buzzer when reverse of
the FNR lever or the FNR switch is selected.
Operation:
1. When reverse of the FNR lever or the FNR switch
is selected, MC grounds the terminal from the
reverse light relay.
2. The reverse light relay is excited, and current
flows to the reverse light and the reverse buzzer.
F
N
R
FNR Lever
or
FNR Switch
SYSTEM / Control System
MC ECM
Monitor
Unit
Reverse Light
Relay
From #8 of From #11 of
Fuse Box A Fuse Box A
T2-1-48
Right
Reverse Light
Reverse Buzzer
Left
Reverse Light
T4GD-02-01-004