Near Intersection of I-35 & I-90 Southern Mn. | The High Current connector (2 pin Gray Deutsch) is used and needed to supply 12VDC and ground to each of your modules. You might even need 12VDC and ground for some other devices such as spray valves. This high current power is what does the "work" of the module such as opening valves, adjusting a control valve, triggering clutches etc. The four small wires are for communication to allow the modules to "talk" to each other.
If you were using a genuine Ag Leader cable from the tractor disconnect to the modules,this could be done various ways. For example on my planter I have several modules beside each other similar to your picture. I have an Ag Leader cable coming from the tractor that disconnects at the hitch. It has 4 large pins (2 Pairs of High Current Power and Ground). One pair gets its power and ground directly through the Display cable. The other pair uses a short stub to the tractor battery to feed the other pair. This cable also has four smaller pins in the center that deal with the CAN communication to/from the various modules. You need both.
This cable gives me 3, 2 pin Deutsch connectors for high current power and ground back on the planter. Like you I need more, some for modules and some to provide power/ground to my spray valves. This could be done several ways, I chose to make some splitters to provide enough connections. I tried to even out the load by having some on each high current pair/ground.
There's no reason you couldn't use a bus bar as you suggest. The only restriction would be that the wiring is heavy enough to handle the electrical load. The bus bar would be wired "hot" to the tractor battery. It might seem that wiring them "hot" could cause a draw on the battery but the draw is minor.
I would suggest using a battery disconnect anyway for such situations.
Looks like you broke off one of the corners on the lower module. I did the same. I found that it is not necessary to tighten them very tight.
Edited by tedbear 8/10/2025 13:53
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can you supply 12v to ag leader modules externally?
