Hitachi ZW180 Technical Manual page 157

From Fuse #7 of
Fuse Box B
Intake Air
Heater Relay
Intake Air
Heater
Fuse
(120A)
To Fuse #7 of
Fuse Box B
NOTE: The illustration shows the current flow
when preheating is made with the intake-air
heater relay excited and the power
supplied to the intake-air heater.
SYSTEM / Electrical System
Key Switch
Fusible
Link
T2-4-7
Fuse Box A
7
8
Battery
Relay
Monitor
Unit
Preheat
Indicator
1-24
39
40
42
50
ECM
Battery
T4GD-02-04-012