Kubota U20-3 Workshop Manual page 471

U20-3, U25-3 WSM
(4)Horn circuit
(Horn SW is off position)
Horn SW
Horn SW
Horn
GND
Diode
Horn
GND
Diode
V-M-12
Electrical system (Mechanism section)
• When horn switch is off, current doesn't flow
through relay.
So relay remains off condition and horn
doesn't sound.
• When horn switch is on position, current
flows through relay, magnetizes it and acti-
vates horn.