Near Intersection of I-35 & I-90 Southern Mn. | Hopefully I can shed some light on your situation. First of all there ae MANY ways to accomplish your goals. The choice of a plan depends on 1) what you have already and 2) what you wish to end up with. Although functionally equivalent, a choice of a plan is somewhat dependent on your rig.
From your brief description I must make certain assumptions. I'm guessing that this is a pull-type sprayer which is pulled by a tractor. If this is the case then having a disconnect point at the hitch is pretty much a necessity. If this is a Self propelled rig then having a disconnect point is not necessary but wouldn't hurt anything.
I have used an Ag Leader display with a switch box arrangement and Liquid Product Control module in several rigs through the years. Possibly explaining them might be helpful to you, then again it might tend to confuse.
A complete Ag Leader spray control system requires an Ag Leader display, a GPS source, a switch box arrangement (there are two choices) and a Liquid Product Control module as well as the interconnecting wiring. The Liquid Product control module has a connection for a flow meter, control valve and section valve(s). These parts and pieces need to be connected together. There are several ways this can be done. Some approaches fit a situation better than others. There is no single "right" way.
Situation 1: I had a pull type sprayer that was being controlled by a Raven 440/450 type controller. It consisted of a Raven display cable in the tractor and an implement cable that connected to it at the hitch point and went back to the Raven flow meter, Raven butterfly control valve and section valves on the sprayer. The Raven display cable has a 16 pin (not 18 as you suggest) AMP female connector on both ends and was 10' long. One end connected to the Raven 440/450 and the other end stuck out the back window of the cab. This cable has a pair of heavy Red and White wires to connect directly to the vehicle battery. The portion sticking out the back window had another 16 pin female connector which mated with the Raven 16 pin male connector harness that was on the sprayer and lead to the flow meter, control valve and section valves.
I wanted to remove the Raven 440/450 and replace it with Ag Leader components. I purchased and actually still have an Ag Leader Raven Adapter harness for this arrangement. It has connections for the two modules (switch box arrangement) and Liquid Product Control module and the various connectors to allow it to go in place of the Raven440/450. This means that the wiring harness and modules are all in the cab and make a bulky mess of components and wires. I placed them in a small Gym bag and placed them in the corner of the cab.
This is the arrangement to which you refer. Because the assumption is that the rig is presently being controlled by a Raven 440/450 that you will have both the Raven display cable and the Raven implement cable. If you have not been using a Raven 440/450 presently you would not have those Raven cables. You could purchase them but I wouldn't go that route. It sounds as if you have already purchased the implement cable from Raven. Possibly that could be returned. To complete that approach would require obtaining a Raven display cable from Raven and the Ag Leader Raven replacement harness. I would not go that route unless you want the option of using a Raven 440/450 at times because the Ag Leader is busy elsewhere.
Situation 2: I have a planting tractor with Ag Leader components in it and a Deere 1770NT planter. The Ag Leader display and switch box arrangement are in the cab of the tractor. No Raven cables are involved. An Ag Leader cable sticks out the back window of the cab. This cable terminates in an AMP brand connector that contains four large pins (2 sets of high current power) and four smaller pins in the center. The center pins are the CAN connection consisting of 12V, ground, CAN High and CAN Low. This is the disconnect point for unhooking the planter. The cable on the planter itself consists of a mating connector again containing the large and small pins. This cable leads to the back of the planter where it is connected to Ag Leader Modules. One is a Clutch Control Module, Another is the STTM (population module) and another is a Liquid Product Control module to control spray on the planter. Various CAN tees are needed since I use several modules and a CAN terminator is required.
Since I don't think you have a Raven 440/450 and I think you need a disconnect point, this is the route I would suggest for your sprayer situation. It would not utilize the Raven implement cable that you have obtained. Ag Leader has a cable that connects to the Raven flow meter control valve and section valves with the AMP connector. For a pull-type sprayer that cable is generally long enough. I needed an extension since the planter is quite long in transport position. Your Liquid Module would be on the sprayer in reasonably close proximity to the flow meter, control valve and sectio valves. There would be a disconnect point at the hitch. This would result in a minimum of cab clutter.
Situation 3: I have a Hagie STS-12 sprayer. The above wiring arrangement would work with it but there would be no need for a disconnect point at the hitch since the wiring can always remain intact. I have a custom wiring harness that allows the Ag Leader Liquid module to connect to the flow meter, control valve and section valves as well as connect to the switch box arrangement. I don't believe this approach is appropriate for your situation. My Ag Leader Auxiliary Input Module and Liquid Product Control module are housed in a box in the right front corner of he Hagie. This arrangement is likely not desirable for your sprayer.
You may wonder why I refer to a "switch box arrangement". The reason is that there are two functionally equivalent ways to handle this. You must use one or the other but never both at the same time.
One method is to use an Ag Leader Module which is called the Auxiliary Input Module. This is a module that plugs into the small round CAN connector. It has a Green connector and a Brown connector. each connector contains several pins. These pins are typically connected to a switch box. This is how the operator signals his intentions to the system for things such as allowing a boom to come ON, etc.
The other method is to use an Ag Leader SC110 CAN switch box. This is functionally equivalent to the above but it is a single enclosure that contains 11 switches and the electronic circuitry of the Auxiliary Input Module.
You would use one or the other of these two switch box arrangements. The SC110 often results in less cab clutter but seems overkill for some installations such as a single section spreader truck. For those situations an Auxiliary Input Module and a single toggle switch are adequate.
A knowledgeable Ag Leader dealer should be able to show you and explain to you how the above choices might fit your situation. Unfortunately many sales people just don't have experience in these matters.
Give me a call if you wish. You will need to leave a message since I have a SPAM filter that won't let the call come through unless your number is in my contact list.
Edited by tedbear 3/6/2026 07:17
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Ag leader liquid control harness question