New Holland LS140 Workshop Manual page 493

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SECTION 55 - ELECTRICAL SYSTEM
71
CRANKING CIRCUIT GROUND
The start interlock relay is grounded through the
(B-4) wire to the ground terminal on the start relay.
The system ground (B-6) wire then goes to the
ground terminal of the preheat relay. The system
ground (B-8) wire then goes to the engine ground at
the bell housing.
START RELAY OPERATION
The start relay allows for smaller wires to be used in
the switch circuits. The larger wires are then only
used between the power supply, start relay, and
starter motor. The start relay provides a short path for
the high current required to pull in the starter solenoid
with minimal voltage drop.
The start relay, 1, and the preheat relay, 2, may be
wired in either position. Check wire colors for proper
relay location.
72
55-68