Alltrax controller both diodes

[R&TBabich]

Originally Posted by TahoeDawgZ71

.... There is no polarity of a solenoid. The polarity comes from the diode. ....

I think the magnetic break out solenoids have polarity.
Also, the polarity comes from the battery connections and is followed by the diode.

[Sergio]

His comments were in reference to the MZJ type solenoid he had in his post which does not have any built in polarity.

The Solenoid You have on your picture does not have magnetic blowouts, the + on the side is because there is a diode soldered from factory between the terminals.

That OEM Solenoid is the reason some early Club Car wiring diagrams did not show a diode on the solenoid which some folks erroneously interpreted as not being needed.

You should always have a diode when the Solenoid coil is being activated by an electronic device.

The Solenoids with the Magnetic Blowout like the SW180 in CartsUnlimited drawing will have the + on the Top near when of the big posts to indicate where the highest voltage potential cable is connected.

If not cabled correctly instead of "blowing" the arc out of the contact area when they open, the Solenoid will actually drive the arc inside which can cause premature damage of the contacts surface.

[R&TBabich]

Originally Posted by Sergio

His comments were in reference to the MZJ type solenoid he had in his post which does not have any built in polarity.

The Solenoid You have on your picture does not have magnetic blowouts, the + on the side is because there is a diode soldered from factory between the terminals. ....

It was just the way it was worded.
That little diode is hard to see.
After cleaning off the crud on my OEM solenoid there is a little diode on it.
So, like the magnetic blowout design it's not the solenoid contacts or the activation coil that have polarity.
Having a diode soldered on it or a magnetic blowout circuit determines the polarity of the assembly.

[cajun000]

Originally Posted by R&TBabich

It was just the way it was worded.
That little diode is hard to see.
After cleaning off the crud on my OEM solenoid there is a little diode on it.
So, like the magnetic blowout design it's not the solenoid contacts or the activation coil that have polarity.
Having a diode soldered on it or a magnetic blowout circuit determines the polarity of the assembly.

My pic is the 2017 Onward OEM solenoid. Similar to your pic, but not exactly. I cannot find a small diode between the two small terminals nor a "+" stamped into the solenoid. I am installing an Alltrax 48-400 contoller and need to know if I should install the diode included with the controller on the larger terminals after removing the resistor currently installed. Also, does this solenoid need another diode installed between the two smaller terminals or does this solenoid have an internal diode.