Near Intersection of I-35 & I-90 Southern Mn. | I may not be following exactly what you have done. Possibly I can clear up some confusion or possibly create more. This may be due to differences in terminology or what you are attempting to do.
I am assuming (always dangerous) that you wish to use an Ag Leader Liquid Product Control module with your Hagie. The Liquid Product Control module can control your spray rate, automatically shut off boom sections (Auto swath), create maps. summaries etc. The system can work very well. I have installed several when I worked as a Tech and on my own personal equipment. I have installed the Ag Leader Liquid Product Control Module on my pervious and current Hagie sprayers.
A complete system consists of an appropriate Ag Leader display, a Liquid Product Control Module and some type of switch box arrangement.
The purpose of the switch box arrangement as I call it, is to convey your intentions to the system. The switches on the switch box do not directly control the spray valves in a sprayer as they often do or have done with more basic systems. Instead the switches act as inputs to the system by which you can convey your intentions. They are used in a variety of situations such as spreader trucks, planters, dry box rigs, injection systems etc.
There are two choices. They are functionally equivalent. In some situations either approach is fine. In other situations using one approach or the other may be more desirable. This means the complete system consists of the Ag Leader display, TWO modules and appropriate wiring harnesses to tie this all together.
Switch box choices:
1) Use an Ag Leader Module called the Auxiliary Input Module. This is a black box with various connectors on it. It must be connected to a dumb switch box of some type. This dumb switch box could be a SPDT toggle switch (single swath spreader truck), Ag Leader's dumb switch box (contains 11 switches), a custom made dumb switch box or a special wiring harness to connect to OEM switches such as in your Hagie. With the special wiring harness the Hagie switches become inputs to the system and do not directly control the section valves. A word of caution, the special wiring to repurpose the Hagie switches involves some electronic trickery. It would be possible to make your own harness but knowledge of Ag Leader's switch detect procedure is necessary.
2) Another equally functional approach would be to use Ag Leader's SC110 CAN switch box. With the SC110, the Auxiliary Module is not used and the Hagie switches would not be used. This "smart" switch box contains 11 switches and the equivalent circuitry that the Auxiliary Input Module contains all in a single enclosure. This approach may be "cleaner" in some installs.
Do you have an Auxiliary Input Module or an SC110 CAN switch box? You must have and use one or the other to work with the Liquid Module. The Liquid Product Control Module by itself will not work for you. These two switch box approaches are used in other situations such as spreader trucks, planters, sprayers, injection systems etc. so they are sold as separate items. This is why I ask if you have one or the other. You must have one or the other to work with the Liquid Module.
There are two choices, I personally use one of each.
In my Hagie sprayer, I use an Auxiliary Input Module and the special cable for using the OEM Master and section switches already in my Hagie. By using the Auxiliary Input Module in the Hagie with the special cable, I am able to repurpose the OEM Master and Section switches. Had I put the SC110 smart switch box in the Hagie, it could work fine but would involve mounting the switch box etc. In that case the OEM switches would not be used for anything. So using an Auxiliary Input Module tucked in a box on the cab floor and connected with the special wiring harness to the original Hagie switches was used since it allowed me to use those switches and was a "cleaner" approach.
For my planter tractor, I needed a switch box arrangement also. This was to work with both seed section clutches and spray. Again I had the two choices. For the current planting tractor I decided to purchase an Ag Leader SC110 smart CAN switch box. This is an enclosure containing a Master and 10 switches along with the circuitry of the Auxiliary Input Module. This mounts nicely near the side window and results in less cab clutter. In a previous planter tractor I used a homemade switch box and an Auxiliary Input Module. The homemade switch box contained switches for the Ag Leader Auxiliary Input Module and some other unrelated planter switches all in the same switch box.
So for your Hagie, you have the choice of either switch box approach. Using an Auxiliary Input Module and the interceptor wiring harness would seem the best in my opinion. This harness reroutes your switches to the Auxiliary Input Module and the output from the Liquid Module can then control your boom sections. The Hagie switches will no longer directly turn ON the section valves but become inputs to the system indicating that you have given "permission" for a section to be ON. Auto swath and other factors can prevent a section from turning ON.
From you description, I get the impression that you have rewired the original OEM switches beyond the Liquid Product Control Module to operate the valves directly as would have been the case in older more basic systems. Besides the potential for damage and all kinds of other confusion, Auto Swath would not be able to shut off sections automatically for you.
Possibly little of the above pertains to you and your situation. I may be making some incorrect assumptions of what you have and what you are trying to do. Good Luck
Edited by tedbear 1/22/2026 07:20
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Hagie DTS 10, 2100, 284 ag leader conversion
