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trim pump? 2 wire or 3 wire

Old 03-07-2013, 09:55 PM
  #11  
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The black is common earth on a three wire.

Run it to the battery neg or block (prolly closer) and all is good.
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Old 03-08-2013, 07:18 AM
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Originally Posted by snapcracklepop
I didnt know there were 3 wire motors but it seems that if you wanted to use a 3 instead of a 2, all you would have to do is change the relay wiring to make them normal switches instead of polarity reversing.

Have a look at a 3 wire schematic and compare it to the 2 wire.
You could do it, but why .Three wire typically use solenoids and two wire use relays .Wired completely different .If you are having to ask the question ,you probably should just replace with the same type motor that is there. The wiring is simple but why change unless you have to (for whatever reason) JMO. On the relays,they are both "parked" at ground .The one you energize becomes hot and the other remains ground ...polarity reversing......Solenoids are just electric switches with the third black (-) always (-)grd

Last edited by motor; 03-08-2013 at 07:24 AM.
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