Originally Posted by
CoralFan1776
When you say they run in reverse with the cable not plugged in, which end are you referring to?
If you have the cable unplugged from the icecap module for the apex and the pumps are running in either direction then I think you can say there is something wrong with the module.
If you have the 3.5mm end plugged in and the rj45 end unplugged then make sure the 3.5mm plug is in all the way. Also check it with the 3.5mm end unplugged.
Also for clarity, there are two different cables for these modules.
One has a single rj45 that goes to two 3.5mm ends. This cable is referred to as a Y cable and is only capable of running the pumps in the forward direction. You can run two pumps from one rj45 port with it.
The other cable type is one rj45 that ends in one 3.5mm plug. This cable is capable of running the pumps in both the forward and reverse directions. Because of what you said in your description I think this is the cables you have.
With this cable it uses two variable outputs to control one pump. One controls speed and the other controls direction. If you haven't understood that and programmed the ports to match then you could get this behavior.
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