The system for the horns is supplied through the horn relay T3
of the engine compartment control unit
B1
from the direct
line from the battery through the fuse F10 located in
B1
.
The relay coil is energized by an earth
signal when one of the steering switches is closed; these switches
are connected via the clock spring to the stalk unit
H5
.
The relay thereby supplies the high tone horn
P10
and the
low tone horn
P11
.