John Deere — Testing Seat Switch
Testing & diagnosis · Safety Interlock System
From a John Deere owner's manual — check it applies to your exact model before use.
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Before you start
- If engine and mower blades do not stop, there is a problem with your safety interlock circuit
Procedure
- Park machine safely.
- First test: lock park brake, start engine, move throttle to maximum, engage mower, raise up off seat. Result: engine and mower blades should stop.
- Second test: disengage mower, start engine, unlock park brake, raise up off seat. Result: engine should stop.
- Third test: lock park brake, disengage mower, start engine, raise up off seat. Result: engine should continue to run.
Source: John Deere owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.