LR3/Disco 3
voltage to operate the horns. For additional information, refer to
Anti-Theft - Active
(419-01A Anti-Theft - Active)
The horn circuit is permanently connected to battery voltage and therefore the horns can be operated at any time,
irrespective of ignition switch position.
The horns are controlled by a relay which is an integral part of the CJB. The relay contact and solenoid is connected to
the vehicle battery via a fusible link (Link 17) in the battery junction box and a fuse (F12) in the CJB. The horn switches,
when pressed, complete a ground to the relay which energises the solenoid. The energised solenoid closes the relay
contact and battery voltage is supplied to each of the horns. When the horn switch is released, the ground for the solenoid
is broken, the solenoid is de-energised and the relay contact opens, cutting the voltage supply to the horns.
