Hitachi ZW180 Technical Manual page 172

Head Light Lighting Circuit
•
When the key switch is turned to the ON position,
the power from terminal M of the key switch
excites the battery relay through fuse #8 of fuse
box A, and the battery power flows to fuse box A
and fuse Box B.
•
The battery power from fuse #5 of fuse box A
enters the right head light relay.
•
The battery power from fuse #15 of fuse box A
enters the left head light relay.
•
The battery power from fuse #12 of fuse box B
enters the high beam relay.
•
When the head light switch is positioned at
(Head Light), the power from terminal S lights
each of the clearance lights (Refer to Clearance
Light Lighting Circuit.), and the power from
terminal H flows to the dimmer switch.
•
At this time, if the dimmer switch is turned to Lo
(Low Beam), the power enters the right head light
relay and the left head light relay. The battery
power enters the head lights and lights them by
exciting the respective relays.
•
If the dimmer switch is turned to Hi (High Beam),
the power excites the high-beam relay, and the
battery power enters and lights the high-beam
lights. The power from the dimmer switch also
enters terminal 1-22 of the monitor unit and lights
the high-beam indicators.
SYSTEM / Electrical System
T2-4-22