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B-110 lights

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Lights on my B-110 work when not running, but do not work when Running.

Wrong power source I guess.

But what?  Looked at wiring diagrams, but it just shows going to regulator.


Not a labeled terminal on the regulator.





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Should be attached to the "Bat" terminal if a 3 connection regulator or to the "Light" or "Accessory" terminal on a 4 connection regulator. If a 3 should work running or not. The 4 terminal sometimes only when running, depends on the regulator. If a 4 connection and lights work when not running but not when running is it charging? 


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Dug into this today.  Pretty simple, old switch.  Aftermarket plastic switch was worn loose, would not stay on when engine with vibration was running.



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