New Holland LS140 Workshop Manual page 494

START RELAY CIRCUIT
The power originates at the battery and flows through
the (R) positive battery cable to the starter solenoid.
From here the power flows through the (R) wire to the
battery side of the start relay.
The power then flows through the (R) wire to the
preheat circuit breaker and to the engine fuse panel
to the 15A key main fuse.
The power then flows through the (R/W) wire to the
battery terminal on the ignition key switch.
When the service/run switch is in the "RUN" position,
the operator is in the seat with the seat belt buckled,
SECTION 55 - ELECTRICAL SYSTEM
and the start interlock relay is energized by the
W/LTGN wire from the service/run switch, the start
relay receives energizing power from the seat/seat
belt circuit via the W/O wire, then the (W/DKBL) wire
from the start interlock relay.
When the service/run switch is in the "SERVICE"
position, the start relay receives energizing power
through the (W/DKBL) wire from the service/run
switch.
When the start relay is activated, it connects the
battery side of the relay to the start side and sends
power to the starter solenoid through the (W/R) wire,
activating the starter motor.
55-69
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