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Solenoid change.


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#1 brandoncarr OFFLINE  

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Posted August 31, 2015 - 07:47 AM

I have a 25 year old yard man. I need to replace the 3 pole solenoid on it and I bought a 4 pole. The solenoid bracket is under the seat with the battery. Can I connect the ground from the solenoid to the same ground as the battery? Or do I need a different ground?

#2 Bruce Dorsi ONLINE  

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Posted August 31, 2015 - 09:01 AM

 Can I connect the ground from the solenoid to the same ground as the battery?

 

Yes.



#3 glgrumpy ONLINE  

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Posted August 31, 2015 - 12:40 PM

The fourth term, if a small one is just 12 volts to points at start Only, and nothing when key's in On position. Don't use that terminal and you should be same as 3 term.

#4 Bruce Dorsi ONLINE  

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Posted August 31, 2015 - 04:09 PM

The fourth term, if a small one is just 12 volts to points at start Only, and nothing when key's in On position. Don't use that terminal and you should be same as 3 term.

 

Actually, there are two types of solenoids with 4 terminals.

 

One type is as you describe - one small terminal supplies full battery voltage to the ignition coil, the other small terminal energizes the solenoid.  ...The solenoid coil is grounded through its base.

 

The other type has the solenoid coil connected in series with the two small terminals.  .....One small terminal gets grounded, and the other small terminal gets battery voltage to activate the solenoid.  .....The solenoid coil is isolated from the base and the two large terminals.






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