45Service Manual – SC6000 04 - Control System
KSI Relay
The KSI relay is located on the back of the main control board. If the KSI relay fails, nearly all machine
functionality will be disabled.
CAUTION: The control board is always receiving power, even when the machine is off. Make sure
to disconnect the main battery connector before working on the control board.
1. Shut down the machine and disconnect the main battery connector under the operator’s seat.
2. Remove the Main Control Board described on page 44, but it may not be necessary to disconnect the
harness connectors if space permits.
3. Remove the two screws that secure the relay to
the back of the controller, and free up the relay
from the control board.
4. Before removing any wires, make note of which
wires are connected to which terminal on the
relay.
• The two terminals separate from the others
are for the relay coil. One terminal should
have a Battery+ connection (B), and the
other should be connected to the main control
board (C).
• The six grouped terminals are for the double-
pole, double-throw contacts. The farthest
terminals are connected to Battery+. The
middle terminals are the main KSI output
power wires.
B
C
D
A
E
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