crosses the switch and supplies the asher unit on the LG/K wire. At the same
time contacts are closed to connect the hazard warning light and the asher
unit to both the G/W and GIR wires, the right-hand and left-hand indicators and
the warning light ash alternately.
11.3 Other auxiliary systems
11.3.1 Electric horns
Regulations in most countries state that the horn (or audible warning device)
should produce a uniform sound. This consequently makes sirens and melody-
type fanfare horns illegal! Most horns draw a large current, so are switched by
a suitable relay.
The standard horn operates by simple electromagnetic switching. ...
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