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ELECTRICAL SYSTEMS
Purpose
The interlock module monitors the status of the safety
switch and prevents the engine from running if an
unsafe condition exists.
How It Works
When the ignition switch is in the "ON" or "START"
position, B+ to power the module is supplied to the blue
wire from the "A" terminal of the ignition switch. The
black wires are connected to the chassis ground and
provide B- for the module internal circuit and also for
the safety switches. The yellow and brown wires are
connected together through the blade switch and
motion control switches. This circuit is closed when the
blade switch is off and the control levers are in the out
position, allowing the engine to run with the operator
out of the seat. When the unit is in operation (blade
switch on and control levers in), the brown wire is
connected to ground through the seat switch. If ground
is removed from the brown wire, the module waits a
half second and then shuts down the engine by
sending a ground signal to the kill terminal through the
red/black wire.
Testing
1.
Apply B+ to blue wire and B- to black wire.
2.
Check for continuity between red/black wire and
B-.
Continuity = OK
No continuity = Bad
3.
Connect yellow and brown wires together.
4.
Check for continuity between red/black and B-.
Continuity = Bad
No continuity = OK
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Interlock Module
Mid-Mount Z Service Manual
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