Cub Cadet Z-Force S Series - Manual (Page 107)

Electrical System
101
Engine shut-down circuits
Engine shutdown circuits stop the engine by disabling
the ignition and removes power from the afterfire solenoid.
Key switch shut-down: See Figure 7.18.
The key switch turned to OFF connects the M (Mag-
neto) terminal and A1 to G (Ground).
• Grounding the magneto primary windings pre-
vents the magneto from developing the magnetic
field that it collapses to generate a spark. This dis-
ables the ignition.
• The A1 terminal is de-energized.
NOTE: On older electrical system, prior to 2008, the after-
fire solenoid was powered by the alternator. In
order to turn off the afterfire solenoid, the A1 termi-
nal was shorted to ground inside the key switch.
This drains the current from the alternator, de-
energizing the solenoid. That function was left in
place so that the same key switch can be used, but
it is not needed. The Z-Force S powers the sole-
noid through the A1 terminal of the key switch and
not the alternator.
Seat switch and brake switch: See Figure 7.19.
The seat switch and brake switch work in series to
ground the magneto primary windings if the brake is
released while the seat is vacant.
1. The magneto (yellow wire) is connected to the N.C.
terminal of the brake switch.
1a. When the park brake is applied, the plunger of
the park brake switch is depressed, opening the
N.C. (Normally Closed) contacts within the
switch.
1b. When the park brake is released, the plunger
on the switch is extended, closing the N.C. con-
tacts within the switch. This completes part of
the ground path.
1c. The seat switch is the next part of the ground
path. The yellow wire/white trace connects the
park brake switch to the seat switch.
2.The seat switch is connected to the N.C. terminal of the
brake switch (yellow wire/white trace).
2a. When the seat is occupied, the N.C. contacts
within the seat switch are open.
2b. When the seat is vacant, the N.C. contacts
within the seat switch are closed. This com-
pletes the final leg of the ground path when the
park brake is not set, disabling the ignition.
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