The optional services relay
J60 controls
the heating circuit for the seats as well as the electric rear windows
and sun roof:
See
E3060
SUN ROOF
,
See
E3051
ELECTRIC REAR WINDOWS
.
The coil for relay
J60 is energized when
the ignition is switched on (INT/A) by the line for fuse F6 of supplementary
fuse box B98 B, whilst the supply at the relay contact arrives from
the battery, through the line for maxifuse J/B2 of B99.
This supply passes through fuse
F5 of
supplementary fuse box B98 C, which guarantees the protection of
the circuit and reaches the switches in the seats through connection
D70 (left seat) and D71 (right seat): the supply for the two devices
is therefore controlled by the ignition (INT/A) and they are connected
to earth C20.
By pressing the switch on the seat the resistors
for the heaters in the left and right seats,
040 and 041, connected
in parallel, are supplied, until a thermal contact inside the heaters
disconnects the resistors when the temperature exceeds a certain
limit.When the resistors are on, an LED signals
the operation of the device.