Can you test an Ign Switch (318 or 420) to tell if it is working correctly?

318 Engine Ignition Key Diagram

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318 engine/wiring diagram 318 wiring diagram engine firewall Can you test an ign switch (318 or 420) to tell if it is working correctly?

John Deere 318 Onan Engine Differences B43G vs P218G - YouTube

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Can you test an Ign Switch (318 or 420) to tell if it is working correctly?
Can you test an Ign Switch (318 or 420) to tell if it is working correctly?

318 engine/wiring diagram
318 engine/wiring diagram

John Deere 318 Onan Engine Differences B43G vs P218G - YouTube
John Deere 318 Onan Engine Differences B43G vs P218G - YouTube