Near Intersection of I-35 & I-90 Southern Mn. | I was cleaning up my files today and ran across my Ag Leader drawings.
Pin 1 in the brown connector is 12V so it should go the lower terminal of your SPDT switch. Pin 2 in the brown connector is the input for E1 and should go to the center terminal of your SPDT switch. Pin 3 is Switch Detect so it should go to the upper terminal of your switch.
This means when the switch is flipped UP, the center terminal will be connected to the lower terminal and return 12V to E1. When the switch is flipped DOWN the center terminal will be connected to the upper terminal and return what voltage is on the the Switch Detect Pin. The majority of the time the Switch Detect will be at ground.
At startup and every 15 seconds or so, the system performs what I think of as a Switch Presence routine. It leaves the valves at the current positions but sets the Switch Detect temporarily at 12V for a very short period of time. During that time the system quickly checks all inputs to determine which ones have responded with 12V either because they are switched to 12V or connected to Switch Detect which at that time is also 12V. Those that have respond with 12V means that there really is a switch at that location. After this quick check, the Switch Detect Pin returns to ground. The system then only bothers to check the locations that it believes actually have a switch present. After another 15 seconds the process is repeated.
Having the switch UP will indicate that you give permission for the Master to be ON. With the switch DOWN, you take away permission for the Master to be ON. The input diagnostics screen shows the status of the various Inputs so E1 should go to Green when the switch is Up and Black when the switch is Down.
Your picture and text seem to indicate that this is the case so I believe your switch is wired correctly. I believe you have also changed the Auxiliary input screen so the upper right box shows E1 rather than Switch for the Master choice. If you don't change that setting the system will still watch the original Master even though you have added an additional switch. Send a picture of that screen so I can compare it to what I think it should be.
So I believe your wiring and configuration changes dealing with the new switch are correct. I believe the problem is due to some other area of confusion. Remember having the Master Switch ON gives the system permission to apply but several other factors might be preventing application such as a zero target rate, lack of high current power to the control valve, lack of high current power to the L2 modules, auto swath active or other factors.
Edited by tedbear 1/12/2026 12:33
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AgLeader SC110 auxiliary engage switch
