Near Intersection of I-35 & I-90 Southern Mn. | In my experience PWM valves are generally not grounded to the chassis of the machine. This means connecting the two wires either way would be fine. The cable you show would plug in directly to a Raven control valve but will need to be modified to mate with your valve. Your configuration will need to be set up properly as well.
To be certain of this, I would set my meter to continuity and check each wire to chassis ground. I suspect the circuit will be open for each wire to chassis ground. You could then connect the wires either way. Cut off the two pole connector and replace it with a Weather Pack 2 pin Tower.
If you are use an Ag Leader Liquid Module, the two wires involved will be Pin 2 and Pin 7 of the Channel 1 port. My Hagie uses the 12V PWM setting. This sets Pin 2 to send out the PWM signal to the valve. Pin 7 is ground.
With a setting of Ground PWM. Pin 7 becomes the PWM signal out and Pin 2 is ground.
Put the Ag Leader display in "M" (Manual) and try running the pump (best not to run it dry). Using the UP arrow key should cause the pump speed to Increase, Using the DOWN arrow should cause the pump speed to Decrease.
Once this is established you will want to set the zero flow offset value. This number keeps the PWM valve partially open at a point that should be "right on the edge" of just starting to turn your pump. This will the system to be "ready to go" and not have to ramp up to get action. The zero flow offset can be set by trail & error. If the pump starts/stops as desired then increase the zero flow offset value until the pump does not stop when you flip the Master OFF. When this happens the zero flow offset is to high. Reduce it to determine the value wher the pump almost starts turning.
Some messing with these numbers may be necessary. The main thing at first is to get it turning, then being able to adjust the speed with the UP/DOWN keys in the correct direction etc.
You will need to have the implement switch active or jumpered, auto swath inactive and a rate for the product you have chosen since it will default to zero the first time you chose it. The Module must also have good high current power (two pin Deutsch gray connector). A blinking green LED shows good CAN communication but does NOT prove good high current power. This is a common misconception.
I'm somewhat familiar with these since I have been testing a questionable Liquid Product Control module and have determined that Pin 2 is always at 12V no matter the setting. This means something is wrong internally within the one I'm testing. It appears it could still be used for monitoring sn applied rate but not automatically controlling it.
Edited by tedbear 5/9/2025 06:09
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JD PMW Solenoid pinout (hyd drive from a 1770)
