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ebinmaine

Can someone tell me what this switch should do And how to wire it?

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It is a single pole switch that illuminates when on. I have not wire one but you could ohm it out to see which terminals make when switched. If the center terminal remains open that would be ground for the led.

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I took it apart last night.

No center terminal. 

2 separate internal circuits. 

 

The two terminals marked with a x between are connected internally to the light. 

 

The other two, closer together,  are the actual switch. 

I've not had much electrical experience in recent years but why is there 2 terminals with the light across them? 

 

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It is a single pole/single throw switch which will illuminate the handle with a red light when on.

You would supply 12 volts to one of the light terminals and a return (ground) to the other light terminal, polarity doesn't matter. The other two terminals would be the switched load, again polarity is not a concern. 

The reason there are four terminals is you might not be switching a 12 volt load with it.

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2 hours ago, 953 nut said:

It is a single pole/single throw switch which will illuminate the handle with a red light when on.

You would supply 12 volts to one of the light terminals and a return (ground) to the other light terminal, polarity doesn't matter. The other two terminals would be the switched load, again polarity is not a concern. 

The reason there are four terminals is you might not be switching a 12 volt load with it.

Ahhhh...

I knew it was a lit switch and I had never seen a 4 terminal single pole single throw before.

I've had this switch in a box of stuff for a decade or two and I don't actually remember if it works. There is no internal connection from one circuit to the other. Tried it with a multimeter and also physically took it apart. That would tell me that you would have to run a jumper from the  switched side to power the light off and on..... assuming both will be a 12 volt circuit.

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9 hours ago, ebinmaine said:

assuming both will be a 12 volt circuit.

Chances are this would be used for a secondary purpose. As an example, if you wanted to be able to eliminate the PTO/Seat switches temporarily you could put this switch in line with them and know when they were on by seeing the red lighted switch. This could be done on a battery powered ignition or magneto. 

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