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Toro 74240 - Key Switch; Purpose; How It Works; Testing

Toro 74240
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Mid-Mount Z Service Manual 7 - 31
ELECTRICAL SYSTEMS
Purpose
The key switch provides proper switching of the start,
run, stop, and interlock circuits.
How It Works
Detents inside the switch give it three positions: “OFF”,
“RUN”, and “START”. The “START” position is spring
loaded so the switch returns to the “RUN” position
when the key is released.
Testing
1. Disconnect the switch from the wiring harness.
2. Verify the conditions in the table.
3. There should not be continuity between any of the
switch terminals and ground.
KEY SWITCH LOGIC
Position Circuit
Off E-G
On B-A
Start B -A-S
Key
S
witch
Start
Battery
Ground
Accessory
Engine
Kill

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